Run results for: Attribute existence check within NamedNodeMap

Comparing perf of iterating through a NamedNodeMap in syncNodeFrom vs an Array created from said map. In this variant, we only create the array for the element being modified.

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Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Linux

Device Platform: Desktop

Date tested: 4 days ago

Test name	Executions per second
Original	504.6 Ops/sec
With attribute existence check	459.5 Ops/sec

HTML Preparation code:

<div id="start">
    <input checked="checked" class="very-hidden" id="cb-expect-ikeys" name="expect.ikeys" type="checkbox" value="True">
    <div class="form-check mx-auto filter-check" hx-post="ml" hx-target="#ml-lander" hx-trigger="click consume" hx-vals='{"base.sort.col": "rank", "base.sort.dir": "a", "filter.sort.str": "", "filter.sort.col": "", "modal.name": "symbol", "duplicated.col": ""}' id="cb-outer-combo-0">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="(Select All)" id="cb-0" name="i" style="pointer-events: none;" type="checkbox" value="0">
        <label class="form-check-label w-10" for="cb-0" id="cb-label-0">
            (Select All)
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-1">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AAVE" id="cb-1" name="i" type="checkbox" value="1">
        <label class="form-check-label w-10" for="cb-1" id="cb-label-1">
            AAVE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-2">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ADA" id="cb-2" name="i" type="checkbox" value="2">
        <label class="form-check-label w-10" for="cb-2" id="cb-label-2">
            ADA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-3">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ALGO" id="cb-3" name="i" type="checkbox" value="3">
        <label class="form-check-label w-10" for="cb-3" id="cb-label-3">
            ALGO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-4">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="APE" id="cb-4" name="i" type="checkbox" value="4">
        <label class="form-check-label w-10" for="cb-4" id="cb-label-4">
            APE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-5">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AR" id="cb-5" name="i" type="checkbox" value="5">
        <label class="form-check-label w-10" for="cb-5" id="cb-label-5">
            AR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-6">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ATOM" id="cb-6" name="i" type="checkbox" value="6">
        <label class="form-check-label w-10" for="cb-6" id="cb-label-6">
            ATOM
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-7">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AVAX" id="cb-7" name="i" type="checkbox" value="7">
        <label class="form-check-label w-10" for="cb-7" id="cb-label-7">
            AVAX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-8">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AXS" id="cb-8" name="i" type="checkbox" value="8">
        <label class="form-check-label w-10" for="cb-8" id="cb-label-8">
            AXS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-9">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BAT" id="cb-9" name="i" type="checkbox" value="9">
        <label class="form-check-label w-10" for="cb-9" id="cb-label-9">
            BAT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-10">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BCH" id="cb-10" name="i" type="checkbox" value="10">
        <label class="form-check-label w-10" for="cb-10" id="cb-label-10">
            BCH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-11">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BIT" id="cb-11" name="i" type="checkbox" value="11">
        <label class="form-check-label w-10" for="cb-11" id="cb-label-11">
            BIT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-12">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BMAX" id="cb-12" name="i" type="checkbox" value="12">
        <label class="form-check-label w-10" for="cb-12" id="cb-label-12">
            BMAX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-13">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BNB" id="cb-13" name="i" type="checkbox" value="13">
        <label class="form-check-label w-10" for="cb-13" id="cb-label-13">
            BNB
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-14">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BOT" id="cb-14" name="i" type="checkbox" value="14">
        <label class="form-check-label w-10" for="cb-14" id="cb-label-14">
            BOT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-15">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BSV" id="cb-15" name="i" type="checkbox" value="15">
        <label class="form-check-label w-10" for="cb-15" id="cb-label-15">
            BSV
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-16">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BTC" id="cb-16" name="i" type="checkbox" value="16">
        <label class="form-check-label w-10" for="cb-16" id="cb-label-16">
            BTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-17">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BTT" id="cb-17" name="i" type="checkbox" value="17">
        <label class="form-check-label w-10" for="cb-17" id="cb-label-17">
            BTT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-18">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BUSD" id="cb-18" name="i" type="checkbox" value="18">
        <label class="form-check-label w-10" for="cb-18" id="cb-label-18">
            BUSD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-19">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CAKE" id="cb-19" name="i" type="checkbox" value="19">
        <label class="form-check-label w-10" for="cb-19" id="cb-label-19">
            CAKE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-20">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CDAI" id="cb-20" name="i" type="checkbox" value="20">
        <label class="form-check-label w-10" for="cb-20" id="cb-label-20">
            CDAI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-21">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CETH" id="cb-21" name="i" type="checkbox" value="21">
        <label class="form-check-label w-10" for="cb-21" id="cb-label-21">
            CETH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-22">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CHZ" id="cb-22" name="i" type="checkbox" value="22">
        <label class="form-check-label w-10" for="cb-22" id="cb-label-22">
            CHZ
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-23">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CRO" id="cb-23" name="i" type="checkbox" value="23">
        <label class="form-check-label w-10" for="cb-23" id="cb-label-23">
            CRO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-24">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CUSDC" id="cb-24" name="i" type="checkbox" value="24">
        <label class="form-check-label w-10" for="cb-24" id="cb-label-24">
            CUSDC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-25">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CWBTC" id="cb-25" name="i" type="checkbox" value="25">
        <label class="form-check-label w-10" for="cb-25" id="cb-label-25">
            CWBTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-26">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DAI" id="cb-26" name="i" type="checkbox" value="26">
        <label class="form-check-label w-10" for="cb-26" id="cb-label-26">
            DAI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-27">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DASH" id="cb-27" name="i" type="checkbox" value="27">
        <label class="form-check-label w-10" for="cb-27" id="cb-label-27">
            DASH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-28">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DOGE" id="cb-28" name="i" type="checkbox" value="28">
        <label class="form-check-label w-10" for="cb-28" id="cb-label-28">
            DOGE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-29">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DOT" id="cb-29" name="i" type="checkbox" value="29">
        <label class="form-check-label w-10" for="cb-29" id="cb-label-29">
            DOT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-30">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ECOIN" id="cb-30" name="i" type="checkbox" value="30">
        <label class="form-check-label w-10" for="cb-30" id="cb-label-30">
            ECOIN
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-31">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="EGLD" id="cb-31" name="i" type="checkbox" value="31">
        <label class="form-check-label w-10" for="cb-31" id="cb-label-31">
            EGLD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-32">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ENJ" id="cb-32" name="i" type="checkbox" value="32">
        <label class="form-check-label w-10" for="cb-32" id="cb-label-32">
            ENJ
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-33">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ENS" id="cb-33" name="i" type="checkbox" value="33">
        <label class="form-check-label w-10" for="cb-33" id="cb-label-33">
            ENS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-34">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="EOS" id="cb-34" name="i" type="checkbox" value="34">
        <label class="form-check-label w-10" for="cb-34" id="cb-label-34">
            EOS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-35">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ETC" id="cb-35" name="i" type="checkbox" value="35">
        <label class="form-check-label w-10" for="cb-35" id="cb-label-35">
            ETC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-36">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ETH" id="cb-36" name="i" type="checkbox" value="36">
        <label class="form-check-label w-10" for="cb-36" id="cb-label-36">
            ETH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-37">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ETHW" id="cb-37" name="i" type="checkbox" value="37">
        <label class="form-check-label w-10" for="cb-37" id="cb-label-37">
            ETHW
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-38">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="EVMOS" id="cb-38" name="i" type="checkbox" value="38">
        <label class="form-check-label w-10" for="cb-38" id="cb-label-38">
            EVMOS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-39">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FEI" id="cb-39" name="i" type="checkbox" value="39">
        <label class="form-check-label w-10" for="cb-39" id="cb-label-39">
            FEI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-40">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FIL" id="cb-40" name="i" type="checkbox" value="40">
        <label class="form-check-label w-10" for="cb-40" id="cb-label-40">
            FIL
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-41">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FLOW" id="cb-41" name="i" type="checkbox" value="41">
        <label class="form-check-label w-10" for="cb-41" id="cb-label-41">
            FLOW
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-42">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FRAX" id="cb-42" name="i" type="checkbox" value="42">
        <label class="form-check-label w-10" for="cb-42" id="cb-label-42">
            FRAX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-43">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FRAX3CRV-f" id="cb-43" name="i" type="checkbox" value="43">
        <label class="form-check-label w-10" for="cb-43" id="cb-label-43">
            FRAX3CRV-f
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-44">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FTM" id="cb-44" name="i" type="checkbox" value="44">
        <label class="form-check-label w-10" for="cb-44" id="cb-label-44">
            FTM
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-45">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FTT" id="cb-45" name="i" type="checkbox" value="45">
        <label class="form-check-label w-10" for="cb-45" id="cb-label-45">
            FTT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-46">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="G-UNI" id="cb-46" name="i" type="checkbox" value="46">
        <label class="form-check-label w-10" for="cb-46" id="cb-label-46">
            G-UNI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-47">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="GRT" id="cb-47" name="i" type="checkbox" value="47">
        <label class="form-check-label w-10" for="cb-47" id="cb-label-47">
            GRT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-48">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="GT" id="cb-48" name="i" type="checkbox" value="48">
        <label class="form-check-label w-10" for="cb-48" id="cb-label-48">
            GT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-49">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HBAR" id="cb-49" name="i" type="checkbox" value="49">
        <label class="form-check-label w-10" for="cb-49" id="cb-label-49">
            HBAR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-50">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HEART" id="cb-50" name="i" type="checkbox" value="50">
        <label class="form-check-label w-10" for="cb-50" id="cb-label-50">
            HEART
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-51">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HNT" id="cb-51" name="i" type="checkbox" value="51">
        <label class="form-check-label w-10" for="cb-51" id="cb-label-51">
            HNT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-52">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HT" id="cb-52" name="i" type="checkbox" value="52">
        <label class="form-check-label w-10" for="cb-52" id="cb-label-52">
            HT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-53">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ICP" id="cb-53" name="i" type="checkbox" value="53">
        <label class="form-check-label w-10" for="cb-53" id="cb-label-53">
            ICP
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-54">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="KAVA" id="cb-54" name="i" type="checkbox" value="54">
        <label class="form-check-label w-10" for="cb-54" id="cb-label-54">
            KAVA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-55">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="KCS" id="cb-55" name="i" type="checkbox" value="55">
        <label class="form-check-label w-10" for="cb-55" id="cb-label-55">
            KCS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-56">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="KLAY" id="cb-56" name="i" type="checkbox" value="56">
        <label class="form-check-label w-10" for="cb-56" id="cb-label-56">
            KLAY
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-57">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LDO" id="cb-57" name="i" type="checkbox" value="57">
        <label class="form-check-label w-10" for="cb-57" id="cb-label-57">
            LDO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-58">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LINK" id="cb-58" name="i" type="checkbox" value="58">
        <label class="form-check-label w-10" for="cb-58" id="cb-label-58">
            LINK
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-59">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LTC" id="cb-59" name="i" type="checkbox" value="59">
        <label class="form-check-label w-10" for="cb-59" id="cb-label-59">
            LTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-60">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LUNC" id="cb-60" name="i" type="checkbox" value="60">
        <label class="form-check-label w-10" for="cb-60" id="cb-label-60">
            LUNC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-61">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MANA" id="cb-61" name="i" type="checkbox" value="61">
        <label class="form-check-label w-10" for="cb-61" id="cb-label-61">
            MANA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-62">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MATIC" id="cb-62" name="i" type="checkbox" value="62">
        <label class="form-check-label w-10" for="cb-62" id="cb-label-62">
            MATIC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-63">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MIOTA" id="cb-63" name="i" type="checkbox" value="63">
        <label class="form-check-label w-10" for="cb-63" id="cb-label-63">
            MIOTA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-64">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MKR" id="cb-64" name="i" type="checkbox" value="64">
        <label class="form-check-label w-10" for="cb-64" id="cb-label-64">
            MKR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-65">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="NEAR" id="cb-65" name="i" type="checkbox" value="65">
        <label class="form-check-label w-10" for="cb-65" id="cb-label-65">
            NEAR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-66">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="NEO" id="cb-66" name="i" type="checkbox" value="66">
        <label class="form-check-label w-10" for="cb-66" id="cb-label-66">
            NEO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-67">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="NEXO" id="cb-67" name="i" type="checkbox" value="67">
        <label class="form-check-label w-10" for="cb-67" id="cb-label-67">
            NEXO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-68">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="OSMO" id="cb-68" name="i" type="checkbox" value="68">
        <label class="form-check-label w-10" for="cb-68" id="cb-label-68">
            OSMO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-69">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="PAXG" id="cb-69" name="i" type="checkbox" value="69">
        <label class="form-check-label w-10" for="cb-69" id="cb-label-69">
            PAXG
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-70">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="QNT" id="cb-70" name="i" type="checkbox" value="70">
        <label class="form-check-label w-10" for="cb-70" id="cb-label-70">
            QNT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-71">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="RUNE" id="cb-71" name="i" type="checkbox" value="71">
        <label class="form-check-label w-10" for="cb-71" id="cb-label-71">
            RUNE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-72">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SAND" id="cb-72" name="i" type="checkbox" value="72">
        <label class="form-check-label w-10" for="cb-72" id="cb-label-72">
            SAND
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-73">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SHIB" id="cb-73" name="i" type="checkbox" value="73">
        <label class="form-check-label w-10" for="cb-73" id="cb-label-73">
            SHIB
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-74">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SNX" id="cb-74" name="i" type="checkbox" value="74">
        <label class="form-check-label w-10" for="cb-74" id="cb-label-74">
            SNX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-75">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SOL" id="cb-75" name="i" type="checkbox" value="75">
        <label class="form-check-label w-10" for="cb-75" id="cb-label-75">
            SOL
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-76">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="STETH" id="cb-76" name="i" type="checkbox" value="76">
        <label class="form-check-label w-10" for="cb-76" id="cb-label-76">
            STETH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-77">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="THETA" id="cb-77" name="i" type="checkbox" value="77">
        <label class="form-check-label w-10" for="cb-77" id="cb-label-77">
            THETA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-78">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="TKX" id="cb-78" name="i" type="checkbox" value="78">
        <label class="form-check-label w-10" for="cb-78" id="cb-label-78">
            TKX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-79">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="TRX" id="cb-79" name="i" type="checkbox" value="79">
        <label class="form-check-label w-10" for="cb-79" id="cb-label-79">
            TRX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-80">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="TUSD" id="cb-80" name="i" type="checkbox" value="80">
        <label class="form-check-label w-10" for="cb-80" id="cb-label-80">
            TUSD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-81">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="UNI" id="cb-81" name="i" type="checkbox" value="81">
        <label class="form-check-label w-10" for="cb-81" id="cb-label-81">
            UNI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-82">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDC" id="cb-82" name="i" type="checkbox" value="82">
        <label class="form-check-label w-10" for="cb-82" id="cb-label-82">
            USDC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-83">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDD" id="cb-83" name="i" type="checkbox" value="83">
        <label class="form-check-label w-10" for="cb-83" id="cb-label-83">
            USDD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-84">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDP" id="cb-84" name="i" type="checkbox" value="84">
        <label class="form-check-label w-10" for="cb-84" id="cb-label-84">
            USDP
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-85">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDT" id="cb-85" name="i" type="checkbox" value="85">
        <label class="form-check-label w-10" for="cb-85" id="cb-label-85">
            USDT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-86">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USTC" id="cb-86" name="i" type="checkbox" value="86">
        <label class="form-check-label w-10" for="cb-86" id="cb-label-86">
            USTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-87">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="VET" id="cb-87" name="i" type="checkbox" value="87">
        <label class="form-check-label w-10" for="cb-87" id="cb-label-87">
            VET
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-88">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="VGX" id="cb-88" name="i" type="checkbox" value="88">
        <label class="form-check-label w-10" for="cb-88" id="cb-label-88">
            VGX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-89">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="WBTC" id="cb-89" name="i" type="checkbox" value="89">
        <label class="form-check-label w-10" for="cb-89" id="cb-label-89">
            WBTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-90">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XCN" id="cb-90" name="i" type="checkbox" value="90">
        <label class="form-check-label w-10" for="cb-90" id="cb-label-90">
            XCN
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-91">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XDC" id="cb-91" name="i" type="checkbox" value="91">
        <label class="form-check-label w-10" for="cb-91" id="cb-label-91">
            XDC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-92">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XEC" id="cb-92" name="i" type="checkbox" value="92">
        <label class="form-check-label w-10" for="cb-92" id="cb-label-92">
            XEC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-93">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XLM" id="cb-93" name="i" type="checkbox" value="93">
        <label class="form-check-label w-10" for="cb-93" id="cb-label-93">
            XLM
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-94">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XMR" id="cb-94" name="i" type="checkbox" value="94">
        <label class="form-check-label w-10" for="cb-94" id="cb-label-94">
            XMR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-95">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XRD" id="cb-95" name="i" type="checkbox" value="95">
        <label class="form-check-label w-10" for="cb-95" id="cb-label-95">
            XRD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-96">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XRP" id="cb-96" name="i" type="checkbox" value="96">
        <label class="form-check-label w-10" for="cb-96" id="cb-label-96">
            XRP
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-97">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XTZ" id="cb-97" name="i" type="checkbox" value="97">
        <label class="form-check-label w-10" for="cb-97" id="cb-label-97">
            XTZ
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-98">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ZEC" id="cb-98" name="i" type="checkbox" value="98">
        <label class="form-check-label w-10" for="cb-98" id="cb-label-98">
            ZEC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-99">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ZIL" id="cb-99" name="i" type="checkbox" value="99">
        <label class="form-check-label w-10" for="cb-99" id="cb-label-99">
            ZIL
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-100">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="f6-sOHM" id="cb-100" name="i" type="checkbox" value="100">
        <label class="form-check-label w-10" for="cb-100" id="cb-label-100">
            f6-sOHM
        </label>
    </div>
</div>

<div id="end">
    <input checked="checked" class="very-hidden" id="cb-expect-ikeys" name="expect.ikeys" type="checkbox" value="True">
    <div class="form-check mx-auto filter-check" hx-post="ml" hx-target="#ml-lander" hx-trigger="click consume" hx-vals='{"base.sort.col": "rank", "base.sort.dir": "a", "filter.sort.str": "", "filter.sort.col": "", "modal.name": "symbol", "duplicated.col": ""}' id="cb-outer-combo-0">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="(Select All)" id="cb-0" name="i" style="pointer-events: none;" type="checkbox" value="0">
        <label class="form-check-label w-10" for="cb-0" id="cb-label-0">
            (Select All)
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-1">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AAVE" id="cb-1" name="i" type="checkbox" value="1">
        <label class="form-check-label w-10" for="cb-1" id="cb-label-1">
            AAVE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-2">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ADA" id="cb-2" name="i" type="checkbox" value="2">
        <label class="form-check-label w-10" for="cb-2" id="cb-label-2">
            ADA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-3">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ALGO" id="cb-3" name="i" type="checkbox" value="3">
        <label class="form-check-label w-10" for="cb-3" id="cb-label-3">
            ALGO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-4">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="APE" id="cb-4" name="i" type="checkbox" value="4">
        <label class="form-check-label w-10" for="cb-4" id="cb-label-4">
            APE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-5">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AR" id="cb-5" name="i" type="checkbox" value="5">
        <label class="form-check-label w-10" for="cb-5" id="cb-label-5">
            AR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-6">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ATOM" id="cb-6" name="i" type="checkbox" value="6">
        <label class="form-check-label w-10" for="cb-6" id="cb-label-6">
            ATOM
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-7">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AVAX" id="cb-7" name="i" type="checkbox" value="7">
        <label class="form-check-label w-10" for="cb-7" id="cb-label-7">
            AVAX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-8">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="AXS" id="cb-8" name="i" type="checkbox" value="8">
        <label class="form-check-label w-10" for="cb-8" id="cb-label-8">
            AXS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-9">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BAT" id="cb-9" name="i" type="checkbox" value="9">
        <label class="form-check-label w-10" for="cb-9" id="cb-label-9">
            BAT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-10">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BCH" id="cb-10" name="i" type="checkbox" value="10">
        <label class="form-check-label w-10" for="cb-10" id="cb-label-10">
            BCH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-11">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BIT" id="cb-11" name="i" type="checkbox" value="11">
        <label class="form-check-label w-10" for="cb-11" id="cb-label-11">
            BIT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-12">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BMAX" id="cb-12" name="i" type="checkbox" value="12">
        <label class="form-check-label w-10" for="cb-12" id="cb-label-12">
            BMAX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-13">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BNB" id="cb-13" name="i" type="checkbox" value="13">
        <label class="form-check-label w-10" for="cb-13" id="cb-label-13">
            BNB
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-14">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BOT" id="cb-14" name="i" type="checkbox" value="14">
        <label class="form-check-label w-10" for="cb-14" id="cb-label-14">
            BOT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-15">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BSV" id="cb-15" name="i" type="checkbox" value="15">
        <label class="form-check-label w-10" for="cb-15" id="cb-label-15">
            BSV
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-16">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BTC" id="cb-16" name="i" type="checkbox" value="16">
        <label class="form-check-label w-10" for="cb-16" id="cb-label-16">
            BTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-17">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BTT" id="cb-17" name="i" type="checkbox" value="17">
        <label class="form-check-label w-10" for="cb-17" id="cb-label-17">
            BTT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-18">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="BUSD" id="cb-18" name="i" type="checkbox" value="18">
        <label class="form-check-label w-10" for="cb-18" id="cb-label-18">
            BUSD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-19">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CAKE" id="cb-19" name="i" type="checkbox" value="19">
        <label class="form-check-label w-10" for="cb-19" id="cb-label-19">
            CAKE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-20">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CDAI" id="cb-20" name="i" type="checkbox" value="20">
        <label class="form-check-label w-10" for="cb-20" id="cb-label-20">
            CDAI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-21">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CETH" id="cb-21" name="i" type="checkbox" value="21">
        <label class="form-check-label w-10" for="cb-21" id="cb-label-21">
            CETH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-22">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CHZ" id="cb-22" name="i" type="checkbox" value="22">
        <label class="form-check-label w-10" for="cb-22" id="cb-label-22">
            CHZ
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-23">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CRO" id="cb-23" name="i" type="checkbox" value="23">
        <label class="form-check-label w-10" for="cb-23" id="cb-label-23">
            CRO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-24">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CUSDC" id="cb-24" name="i" type="checkbox" value="24">
        <label class="form-check-label w-10" for="cb-24" id="cb-label-24">
            CUSDC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-25">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="CWBTC" id="cb-25" name="i" type="checkbox" value="25">
        <label class="form-check-label w-10" for="cb-25" id="cb-label-25">
            CWBTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-26">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DAI" id="cb-26" name="i" type="checkbox" value="26">
        <label class="form-check-label w-10" for="cb-26" id="cb-label-26">
            DAI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-27">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DASH" id="cb-27" name="i" type="checkbox" value="27">
        <label class="form-check-label w-10" for="cb-27" id="cb-label-27">
            DASH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-28">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DOGE" id="cb-28" name="i" type="checkbox" value="28">
        <label class="form-check-label w-10" for="cb-28" id="cb-label-28">
            DOGE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-29">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="DOT" id="cb-29" name="i" type="checkbox" value="29">
        <label class="form-check-label w-10" for="cb-29" id="cb-label-29">
            DOT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-30">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ECOIN" id="cb-30" name="i" type="checkbox" value="30">
        <label class="form-check-label w-10" for="cb-30" id="cb-label-30">
            ECOIN
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-31">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="EGLD" id="cb-31" name="i" type="checkbox" value="31">
        <label class="form-check-label w-10" for="cb-31" id="cb-label-31">
            EGLD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-32">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ENJ" id="cb-32" name="i" type="checkbox" value="32">
        <label class="form-check-label w-10" for="cb-32" id="cb-label-32">
            ENJ
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-33">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ENS" id="cb-33" name="i" type="checkbox" value="33">
        <label class="form-check-label w-10" for="cb-33" id="cb-label-33">
            ENS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-34">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="EOS" id="cb-34" name="i" type="checkbox" value="34">
        <label class="form-check-label w-10" for="cb-34" id="cb-label-34">
            EOS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-35">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ETC" id="cb-35" name="i" type="checkbox" value="35">
        <label class="form-check-label w-10" for="cb-35" id="cb-label-35">
            ETC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-36">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ETH" id="cb-36" name="i" type="checkbox" value="36">
        <label class="form-check-label w-10" for="cb-36" id="cb-label-36">
            ETH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-37">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ETHW" id="cb-37" name="i" type="checkbox" value="37">
        <label class="form-check-label w-10" for="cb-37" id="cb-label-37">
            ETHW
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-38">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="EVMOS" id="cb-38" name="i" type="checkbox" value="38">
        <label class="form-check-label w-10" for="cb-38" id="cb-label-38">
            EVMOS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-39">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FEI" id="cb-39" name="i" type="checkbox" value="39">
        <label class="form-check-label w-10" for="cb-39" id="cb-label-39">
            FEI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-40">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FIL" id="cb-40" name="i" type="checkbox" value="40">
        <label class="form-check-label w-10" for="cb-40" id="cb-label-40">
            FIL
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-41">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FLOW" id="cb-41" name="i" type="checkbox" value="41">
        <label class="form-check-label w-10" for="cb-41" id="cb-label-41">
            FLOW
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-42">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FRAX" id="cb-42" name="i" type="checkbox" value="42">
        <label class="form-check-label w-10" for="cb-42" id="cb-label-42">
            FRAX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-43">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FRAX3CRV-f" id="cb-43" name="i" type="checkbox" value="43">
        <label class="form-check-label w-10" for="cb-43" id="cb-label-43">
            FRAX3CRV-f
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-44">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FTM" id="cb-44" name="i" type="checkbox" value="44">
        <label class="form-check-label w-10" for="cb-44" id="cb-label-44">
            FTM
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-45">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="FTT" id="cb-45" name="i" type="checkbox" value="45">
        <label class="form-check-label w-10" for="cb-45" id="cb-label-45">
            FTT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-46">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="G-UNI" id="cb-46" name="i" type="checkbox" value="46">
        <label class="form-check-label w-10" for="cb-46" id="cb-label-46">
            G-UNI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-47">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="GRT" id="cb-47" name="i" type="checkbox" value="47">
        <label class="form-check-label w-10" for="cb-47" id="cb-label-47">
            GRT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-48">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="GT" id="cb-48" name="i" type="checkbox" value="48">
        <label class="form-check-label w-10" for="cb-48" id="cb-label-48">
            GT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-49">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HBAR" id="cb-49" name="i" type="checkbox" value="49">
        <label class="form-check-label w-10" for="cb-49" id="cb-label-49">
            HBAR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-50">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HEART" id="cb-50" name="i" type="checkbox" value="50">
        <label class="form-check-label w-10" for="cb-50" id="cb-label-50">
            HEART
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-51">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HNT" id="cb-51" name="i" type="checkbox" value="51">
        <label class="form-check-label w-10" for="cb-51" id="cb-label-51">
            HNT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-52">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="HT" id="cb-52" name="i" type="checkbox" value="52">
        <label class="form-check-label w-10" for="cb-52" id="cb-label-52">
            HT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-53">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ICP" id="cb-53" name="i" type="checkbox" value="53">
        <label class="form-check-label w-10" for="cb-53" id="cb-label-53">
            ICP
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-54">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="KAVA" id="cb-54" name="i" type="checkbox" value="54">
        <label class="form-check-label w-10" for="cb-54" id="cb-label-54">
            KAVA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-55">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="KCS" id="cb-55" name="i" type="checkbox" value="55">
        <label class="form-check-label w-10" for="cb-55" id="cb-label-55">
            KCS
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-56">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="KLAY" id="cb-56" name="i" type="checkbox" value="56">
        <label class="form-check-label w-10" for="cb-56" id="cb-label-56">
            KLAY
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-57">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LDO" id="cb-57" name="i" type="checkbox" value="57">
        <label class="form-check-label w-10" for="cb-57" id="cb-label-57">
            LDO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-58">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LINK" id="cb-58" name="i" type="checkbox" value="58">
        <label class="form-check-label w-10" for="cb-58" id="cb-label-58">
            LINK
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-59">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LTC" id="cb-59" name="i" type="checkbox" value="59">
        <label class="form-check-label w-10" for="cb-59" id="cb-label-59">
            LTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-60">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="LUNC" id="cb-60" name="i" type="checkbox" value="60">
        <label class="form-check-label w-10" for="cb-60" id="cb-label-60">
            LUNC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-61">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MANA" id="cb-61" name="i" type="checkbox" value="61">
        <label class="form-check-label w-10" for="cb-61" id="cb-label-61">
            MANA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-62">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MATIC" id="cb-62" name="i" type="checkbox" value="62">
        <label class="form-check-label w-10" for="cb-62" id="cb-label-62">
            MATIC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-63">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MIOTA" id="cb-63" name="i" type="checkbox" value="63">
        <label class="form-check-label w-10" for="cb-63" id="cb-label-63">
            MIOTA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-64">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="MKR" id="cb-64" name="i" type="checkbox" value="64">
        <label class="form-check-label w-10" for="cb-64" id="cb-label-64">
            MKR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-65">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="NEAR" id="cb-65" name="i" type="checkbox" value="65">
        <label class="form-check-label w-10" for="cb-65" id="cb-label-65">
            NEAR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-66">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="NEO" id="cb-66" name="i" type="checkbox" value="66">
        <label class="form-check-label w-10" for="cb-66" id="cb-label-66">
            NEO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-67">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="NEXO" id="cb-67" name="i" type="checkbox" value="67">
        <label class="form-check-label w-10" for="cb-67" id="cb-label-67">
            NEXO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-68">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="OSMO" id="cb-68" name="i" type="checkbox" value="68">
        <label class="form-check-label w-10" for="cb-68" id="cb-label-68">
            OSMO
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-69">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="PAXG" id="cb-69" name="i" type="checkbox" value="69">
        <label class="form-check-label w-10" for="cb-69" id="cb-label-69">
            PAXG
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-70">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="QNT" id="cb-70" name="i" type="checkbox" value="70">
        <label class="form-check-label w-10" for="cb-70" id="cb-label-70">
            QNT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-71">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="RUNE" id="cb-71" name="i" type="checkbox" value="71">
        <label class="form-check-label w-10" for="cb-71" id="cb-label-71">
            RUNE
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-72">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SAND" id="cb-72" name="i" type="checkbox" value="72">
        <label class="form-check-label w-10" for="cb-72" id="cb-label-72">
            SAND
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-73">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SHIB" id="cb-73" name="i" type="checkbox" value="73">
        <label class="form-check-label w-10" for="cb-73" id="cb-label-73">
            SHIB
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-74">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SNX" id="cb-74" name="i" type="checkbox" value="74">
        <label class="form-check-label w-10" for="cb-74" id="cb-label-74">
            SNX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-75">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="SOL" id="cb-75" name="i" type="checkbox" value="75">
        <label class="form-check-label w-10" for="cb-75" id="cb-label-75">
            SOL
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-76">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="STETH" id="cb-76" name="i" type="checkbox" value="76">
        <label class="form-check-label w-10" for="cb-76" id="cb-label-76">
            STETH
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-77">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="THETA" id="cb-77" name="i" type="checkbox" value="77">
        <label class="form-check-label w-10" for="cb-77" id="cb-label-77">
            THETA
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-78">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="TKX" id="cb-78" name="i" type="checkbox" value="78">
        <label class="form-check-label w-10" for="cb-78" id="cb-label-78">
            TKX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-79">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="TRX" id="cb-79" name="i" type="checkbox" value="79">
        <label class="form-check-label w-10" for="cb-79" id="cb-label-79">
            TRX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-80">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="TUSD" id="cb-80" name="i" type="checkbox" value="80">
        <label class="form-check-label w-10" for="cb-80" id="cb-label-80">
            TUSD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-81">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="UNI" id="cb-81" name="i" type="checkbox" value="81">
        <label class="form-check-label w-10" for="cb-81" id="cb-label-81">
            UNI
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-82">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDC" id="cb-82" name="i" type="checkbox" value="82">
        <label class="form-check-label w-10" for="cb-82" id="cb-label-82">
            USDC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-83">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDD" id="cb-83" name="i" type="checkbox" value="83">
        <label class="form-check-label w-10" for="cb-83" id="cb-label-83">
            USDD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-84">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDP" id="cb-84" name="i" type="checkbox" value="84">
        <label class="form-check-label w-10" for="cb-84" id="cb-label-84">
            USDP
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-85">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USDT" id="cb-85" name="i" type="checkbox" value="85">
        <label class="form-check-label w-10" for="cb-85" id="cb-label-85">
            USDT
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-86">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="USTC" id="cb-86" name="i" type="checkbox" value="86">
        <label class="form-check-label w-10" for="cb-86" id="cb-label-86">
            USTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-87">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="VET" id="cb-87" name="i" type="checkbox" value="87">
        <label class="form-check-label w-10" for="cb-87" id="cb-label-87">
            VET
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-88">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="VGX" id="cb-88" name="i" type="checkbox" value="88">
        <label class="form-check-label w-10" for="cb-88" id="cb-label-88">
            VGX
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-89">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="WBTC" id="cb-89" name="i" type="checkbox" value="89">
        <label class="form-check-label w-10" for="cb-89" id="cb-label-89">
            WBTC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-90">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XCN" id="cb-90" name="i" type="checkbox" value="90">
        <label class="form-check-label w-10" for="cb-90" id="cb-label-90">
            XCN
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-91">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XDC" id="cb-91" name="i" type="checkbox" value="91">
        <label class="form-check-label w-10" for="cb-91" id="cb-label-91">
            XDC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-92">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XEC" id="cb-92" name="i" type="checkbox" value="92">
        <label class="form-check-label w-10" for="cb-92" id="cb-label-92">
            XEC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-93">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XLM" id="cb-93" name="i" type="checkbox" value="93">
        <label class="form-check-label w-10" for="cb-93" id="cb-label-93">
            XLM
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-94">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XMR" id="cb-94" name="i" type="checkbox" value="94">
        <label class="form-check-label w-10" for="cb-94" id="cb-label-94">
            XMR
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-95">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XRD" id="cb-95" name="i" type="checkbox" value="95">
        <label class="form-check-label w-10" for="cb-95" id="cb-label-95">
            XRD
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-96">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XRP" id="cb-96" name="i" type="checkbox" value="96">
        <label class="form-check-label w-10" for="cb-96" id="cb-label-96">
            XRP
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-97">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="XTZ" id="cb-97" name="i" type="checkbox" value="97">
        <label class="form-check-label w-10" for="cb-97" id="cb-label-97">
            XTZ
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-98">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ZEC" id="cb-98" name="i" type="checkbox" value="98">
        <label class="form-check-label w-10" for="cb-98" id="cb-label-98">
            ZEC
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-99">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="ZIL" id="cb-99" name="i" type="checkbox" value="99">
        <label class="form-check-label w-10" for="cb-99" id="cb-label-99">
            ZIL
        </label>
    </div>
    <div class="form-check mx-auto filter-check" id="cb-outer-combo-100">
        <input checked="checked" class="form-check-input float-none tcheckbox" data-value="f6-sOHM" id="cb-100" name="i" type="checkbox" value="100">
        <label class="form-check-label w-10" for="cb-100" id="cb-label-100">
            f6-sOHM
        </label>
    </div>
</div>
      
<script>
  /**
 * @typedef {object} ConfigHead
 *
 * @property {'merge' | 'append' | 'morph' | 'none'} [style]
 * @property {boolean} [block]
 * @property {boolean} [ignore]
 * @property {function(Element): boolean} [shouldPreserve]
 * @property {function(Element): boolean} [shouldReAppend]
 * @property {function(Element): boolean} [shouldRemove]
 * @property {function(Element, {added: Node[], kept: Element[], removed: Element[]}): void} [afterHeadMorphed]
 */

/**
 * @typedef {object} ConfigCallbacks
 *
 * @property {function(Node): boolean} [beforeNodeAdded]
 * @property {function(Node): void} [afterNodeAdded]
 * @property {function(Element, Node): boolean} [beforeNodeMorphed]
 * @property {function(Element, Node): void} [afterNodeMorphed]
 * @property {function(Element): boolean} [beforeNodeRemoved]
 * @property {function(Element): void} [afterNodeRemoved]
 * @property {function(string, Element, "update" | "remove"): boolean} [beforeAttributeUpdated]
 */

/**
 * @typedef {object} Config
 *
 * @property {'outerHTML' | 'innerHTML'} [morphStyle]
 * @property {boolean} [ignoreActive]
 * @property {boolean} [ignoreActiveValue]
 * @property {ConfigCallbacks} [callbacks]
 * @property {ConfigHead} [head]
 */

/**
 * @typedef {function} NoOp
 *
 * @returns {void}
 */

/**
 * @typedef {object} ConfigHeadInternal
 *
 * @property {'merge' | 'append' | 'morph' | 'none'} style
 * @property {boolean} [block]
 * @property {boolean} [ignore]
 * @property {(function(Element): boolean) | NoOp} shouldPreserve
 * @property {(function(Element): boolean) | NoOp} shouldReAppend
 * @property {(function(Element): boolean) | NoOp} shouldRemove
 * @property {(function(Element, {added: Node[], kept: Element[], removed: Element[]}): void) | NoOp} afterHeadMorphed
 */

/**
 * @typedef {object} ConfigCallbacksInternal
 *
 * @property {(function(Node): boolean) | NoOp} beforeNodeAdded
 * @property {(function(Node): void) | NoOp} afterNodeAdded
 * @property {(function(Node, Node): boolean) | NoOp} beforeNodeMorphed
 * @property {(function(Node, Node): void) | NoOp} afterNodeMorphed
 * @property {(function(Node): boolean) | NoOp} beforeNodeRemoved
 * @property {(function(Node): void) | NoOp} afterNodeRemoved
 * @property {(function(string, Element, "update" | "remove"): boolean) | NoOp} beforeAttributeUpdated
 */

/**
 * @typedef {object} ConfigInternal
 *
 * @property {'outerHTML' | 'innerHTML'} morphStyle
 * @property {boolean} [ignoreActive]
 * @property {boolean} [ignoreActiveValue]
 * @property {ConfigCallbacksInternal} callbacks
 * @property {ConfigHeadInternal} head
 */

/**
 * @typedef {Function} Morph
 *
 * @param {Element | Document} oldNode
 * @param {Element | Node | HTMLCollection | Node[] | string | null} newContent
 * @param {Config} [config]
 * @returns {undefined | HTMLCollection | Node[]}
 */

// base IIFE to define idiomorph
/**
 *
 * @type {{defaults: ConfigInternal, morph: Morph}}
 */
window.Idiomorph = (function () {
        'use strict';

        /**
         * @typedef {object} MorphContext
         *
         * @property {Node} target
         * @property {Node} newContent
         * @property {ConfigInternal} config
         * @property {ConfigInternal['morphStyle']} morphStyle
         * @property {ConfigInternal['ignoreActive']} ignoreActive
         * @property {ConfigInternal['ignoreActiveValue']} ignoreActiveValue
         * @property {Map<Node, Set<string>>} idMap
         * @property {Set<string>} deadIds
         * @property {ConfigInternal['callbacks']} callbacks
         * @property {ConfigInternal['head']} head
         */

        //=============================================================================
        // AND NOW IT BEGINS...
        //=============================================================================

        /**
         *
         * @type {Set<string>}
         */
        let EMPTY_SET = new Set();

        /**
         * Default configuration values, updatable by users now
         * @type {ConfigInternal}
         */
        let defaults = {
            morphStyle: "outerHTML",
            callbacks : {
                beforeNodeAdded: noOp,
                afterNodeAdded: noOp,
                beforeNodeMorphed: noOp,
                afterNodeMorphed: noOp,
                beforeNodeRemoved: noOp,
                afterNodeRemoved: noOp,
                beforeAttributeUpdated: noOp,

            },
            head: {
                style: 'merge',
                shouldPreserve: function (elt) {
                    return elt.getAttribute("im-preserve") === "true";
                },
                shouldReAppend: function (elt) {
                    return elt.getAttribute("im-re-append") === "true";
                },
                shouldRemove: noOp,
                afterHeadMorphed: noOp,
            }
        };


        /**
         * =============================================================================
         * Core Morphing Algorithm - morph, morphNormalizedContent, morphOldNodeTo, morphChildren
         * =============================================================================
         *
         * @param {Element | Document} oldNode
         * @param {Element | Node | HTMLCollection | Node[] | string | null} newContent
         * @param {Config} [config]
         * @returns {undefined | HTMLCollection | Node[]}
         */
        function morph(oldNode, newContent, config = {}) {

            if (oldNode instanceof Document) {
                oldNode = oldNode.documentElement;
            }

            if (typeof newContent === 'string') {
                newContent = parseContent(newContent);
            }

            let normalizedContent = normalizeContent(newContent);

            let ctx = createMorphContext(oldNode, normalizedContent, config);

            return morphNormalizedContent(oldNode, normalizedContent, ctx);
        }

        /**
         *
         * @param {Element} oldNode
         * @param {Element} normalizedNewContent
         * @param {MorphContext} ctx
         * @returns {undefined | HTMLCollection| Node[]}
         */
        function morphNormalizedContent(oldNode, normalizedNewContent, ctx) {
            if (ctx.head.block) {
                let oldHead = oldNode.querySelector('head');
                let newHead = normalizedNewContent.querySelector('head');
                if (oldHead && newHead) {
                    let promises = handleHeadElement(newHead, oldHead, ctx);
                    // when head promises resolve, call morph again, ignoring the head tag
                    Promise.all(promises).then(function () {
                        morphNormalizedContent(oldNode, normalizedNewContent, Object.assign(ctx, {
                            head: {
                                block: false,
                                ignore: true
                            }
                        }));
                    });
                    return;
                }
            }

            if (ctx.morphStyle === "innerHTML") {

                // innerHTML, so we are only updating the children
                morphChildren(normalizedNewContent, oldNode, ctx);
                return Array.from(oldNode.children);

            } else if (ctx.morphStyle === "outerHTML" || ctx.morphStyle == null) {
                // otherwise find the best element match in the new content, morph that, and merge its siblings
                // into either side of the best match
                let bestMatch = findBestNodeMatch(normalizedNewContent, oldNode, ctx);

                // stash the siblings that will need to be inserted on either side of the best match
                let previousSibling = bestMatch?.previousSibling ?? null;
                let nextSibling = bestMatch?.nextSibling ?? null;

                // morph it
                let morphedNode = morphOldNodeTo(oldNode, bestMatch, ctx);

                if (bestMatch) {
                    // if there was a best match, merge the siblings in too and return the
                    // whole bunch
                    if (morphedNode) {
                        return insertSiblings(previousSibling, morphedNode, nextSibling);
                    }
                } else {
                    // otherwise nothing was added to the DOM
                    return []
                }
            } else {
                throw "Do not understand how to morph style " + ctx.morphStyle;
            }
        }


        /**
         * @param {Node} possibleActiveElement
         * @param {MorphContext} ctx
         * @returns {boolean}
         */
        // TODO: ignoreActive and ignoreActiveValue are marked as optional since they are not
        //   initialised in the default config object. As a result the && in the function body may
        //   return undefined instead of boolean. Either expand the type of the return value to
        //   include undefined or wrap the ctx.ignoreActiveValue into a Boolean()
        function ignoreValueOfActiveElement(possibleActiveElement, ctx) {
            return !!ctx.ignoreActiveValue && possibleActiveElement === document.activeElement && possibleActiveElement !== document.body;
        }

        /**
         * @param {Node} oldNode root node to merge content into
         * @param {Node | null} newContent new content to merge
         * @param {MorphContext} ctx the merge context
         * @returns {Node | null} the element that ended up in the DOM
         */
        function morphOldNodeTo(oldNode, newContent, ctx) {
            if (ctx.ignoreActive && oldNode === document.activeElement) {
                // don't morph focused element
            } else if (newContent == null) {
                if (ctx.callbacks.beforeNodeRemoved(oldNode) === false) return oldNode;

                oldNode.parentNode?.removeChild(oldNode);
                ctx.callbacks.afterNodeRemoved(oldNode);
                return null;
            } else if (!isSoftMatch(oldNode, newContent)) {
                if (ctx.callbacks.beforeNodeRemoved(oldNode) === false) return oldNode;
                if (ctx.callbacks.beforeNodeAdded(newContent) === false) return oldNode;

                oldNode.parentNode?.replaceChild(newContent, oldNode);
                ctx.callbacks.afterNodeAdded(newContent);
                ctx.callbacks.afterNodeRemoved(oldNode);
                return newContent;
            } else {
                if (ctx.callbacks.beforeNodeMorphed(oldNode, newContent) === false) return oldNode;

                if (oldNode instanceof HTMLHeadElement && ctx.head.ignore) {
                    // ignore the head element
                } else if (oldNode instanceof HTMLHeadElement && ctx.head.style !== "morph") {
                    // ok to cast: if newContent wasn't also a <head>, it would've got caught in the `!isSoftMatch` branch above
                    handleHeadElement(/** @type {HTMLHeadElement} */ (newContent), oldNode, ctx);
                } else {
                    syncNodeFrom(newContent, oldNode, ctx);
                    if (!ignoreValueOfActiveElement(oldNode, ctx)) {
                        morphChildren(newContent, oldNode, ctx);
                    }
                }
                ctx.callbacks.afterNodeMorphed(oldNode, newContent);
                return oldNode;
            }
            return null;
        }

        /**
         * This is the core algorithm for matching up children.  The idea is to use id sets to try to match up
         * nodes as faithfully as possible.  We greedily match, which allows us to keep the algorithm fast, but
         * by using id sets, we are able to better match up with content deeper in the DOM.
         *
         * Basic algorithm is, for each node in the new content:
         *
         * - if we have reached the end of the old parent, append the new content
         * - if the new content has an id set match with the current insertion point, morph
         * - search for an id set match
         * - if id set match found, morph
         * - otherwise search for a "soft" match
         * - if a soft match is found, morph
         * - otherwise, prepend the new node before the current insertion point
         *
         * The two search algorithms terminate if competing node matches appear to outweigh what can be achieved
         * with the current node.  See findIdSetMatch() and findSoftMatch() for details.
         *
         * @param {Node} newParent the parent element of the new content
         * @param {Node} oldParent the old content that we are merging the new content into
         * @param {MorphContext} ctx the merge context
         * @returns {void}
         */
        function morphChildren(newParent, oldParent, ctx) {
            if (newParent instanceof HTMLTemplateElement && oldParent instanceof HTMLTemplateElement) {
              newParent = newParent.content;
              oldParent = oldParent.content;
            }

            /**
             *
             * @type {Node | null}
             */
            let nextNewChild = newParent.firstChild;
            /**
             *
             * @type {Node | null}
             */
            let insertionPoint = oldParent.firstChild;
            let newChild;

            // run through all the new content
            while (nextNewChild) {

                newChild = nextNewChild;
                nextNewChild = newChild.nextSibling;

                // if we are at the end of the exiting parent's children, just append
                if (insertionPoint == null) {
                    if (ctx.callbacks.beforeNodeAdded(newChild) === false) continue;

                    oldParent.appendChild(newChild);
                    ctx.callbacks.afterNodeAdded(newChild);
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // if the current node has an id set match then morph
                if (isIdSetMatch(newChild, insertionPoint, ctx)) {
                    morphOldNodeTo(insertionPoint, newChild, ctx);
                    insertionPoint = insertionPoint.nextSibling;
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // otherwise search forward in the existing old children for an id set match
                let idSetMatch = findIdSetMatch(newParent, oldParent, newChild, insertionPoint, ctx);

                // if we found a potential match, remove the nodes until that point and morph
                if (idSetMatch) {
                    insertionPoint = removeNodesBetween(insertionPoint, idSetMatch, ctx);
                    morphOldNodeTo(idSetMatch, newChild, ctx);
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // no id set match found, so scan forward for a soft match for the current node
                let softMatch = findSoftMatch(newParent, oldParent, newChild, insertionPoint, ctx);

                // if we found a soft match for the current node, morph
                if (softMatch) {
                    insertionPoint = removeNodesBetween(insertionPoint, softMatch, ctx);
                    morphOldNodeTo(softMatch, newChild, ctx);
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // abandon all hope of morphing, just insert the new child before the insertion point
                // and move on
                if (ctx.callbacks.beforeNodeAdded(newChild) === false) continue;

                oldParent.insertBefore(newChild, insertionPoint);
                ctx.callbacks.afterNodeAdded(newChild);
                removeIdsFromConsideration(ctx, newChild);
            }

            // remove any remaining old nodes that didn't match up with new content
            while (insertionPoint !== null) {

                let tempNode = insertionPoint;
                insertionPoint = insertionPoint.nextSibling;
                removeNode(tempNode, ctx);
            }
        }

        //=============================================================================
        // Attribute Syncing Code
        //=============================================================================

        /**
         * @param {string} attr the attribute to be mutated
         * @param {Element} to the element that is going to be updated
         * @param {"update" | "remove"} updateType
         * @param {MorphContext} ctx the merge context
         * @returns {boolean} true if the attribute should be ignored, false otherwise
         */
        function ignoreAttribute(attr, to, updateType, ctx) {
            if(attr === 'value' && ctx.ignoreActiveValue && to === document.activeElement){
                return true;
            }
            return ctx.callbacks.beforeAttributeUpdated(attr, to, updateType) === false;
        }

        /**
         * syncs a given node with another node, copying over all attributes and
         * inner element state from the 'from' node to the 'to' node
         *
         * @param {Node} from the element to copy attributes & state from
         * @param {Node} to the element to copy attributes & state to
         * @param {MorphContext} ctx the merge context
         */
        function syncNodeFrom(from, to, ctx) {
            let type = from.nodeType

            // if is an element type, sync the attributes from the
            // new node into the new node
            if (type === 1 /* element type */) {
                const fromEl = /** @type {Element} */ (from);
                const toEl = /** @type {Element} */ (to);
                const fromAttributes = fromEl.attributes;
                const toAttributes = toEl.attributes;
                for (const fromAttribute of fromAttributes) {
                    if (ignoreAttribute(fromAttribute.name, toEl, 'update', ctx)) {
                        continue;
                    }
                    if (toEl.getAttribute(fromAttribute.name) !== fromAttribute.value) {
                        toEl.setAttribute(fromAttribute.name, fromAttribute.value);
                    }
                }
                // iterate backwards to avoid skipping over items when a delete occurs
  				for (let i = toAttributes.length - 1; 0 <= i; i--) {
                    const toAttribute = toAttributes[i];

                    // toAttributes is a live NamedNodeMap, so iteration+mutation is unsafe
                    // e.g. custom element attribute callbacks can remove other attributes
                    if (!toAttribute) continue;

                    if (!fromEl.hasAttribute(toAttribute.name)) {
                        if (ignoreAttribute(toAttribute.name, toEl, 'remove', ctx)) {
                            continue;
                        }
                        toEl.removeAttribute(toAttribute.name);
                    }
                }
            }

            // sync text nodes
            if (type === 8 /* comment */ || type === 3 /* text */) {
                if (to.nodeValue !== from.nodeValue) {
                    to.nodeValue = from.nodeValue;
                }
            }

            if (!ignoreValueOfActiveElement(to, ctx)) {
                // sync input values
                syncInputValue(from, to, ctx);
            }
        }

        /**
         * @param {Element} from element to sync the value from
         * @param {Element} to element to sync the value to
         * @param {string} attributeName the attribute name
         * @param {MorphContext} ctx the merge context
         */
        function syncBooleanAttribute(from, to, attributeName, ctx) {
            // TODO: prefer set/getAttribute here
            if (!(from instanceof Element && to instanceof Element)) return
            // @ts-ignore this function is only used on boolean attrs that are reflected as dom properties
            const fromLiveValue = from[attributeName], toLiveValue = to[attributeName];
            if (fromLiveValue !== toLiveValue) {
                let ignoreUpdate = ignoreAttribute(attributeName, to, 'update', ctx);
                if (!ignoreUpdate) {
                  // update attribute's associated DOM property
                  // @ts-ignore this function is only used on boolean attrs that are reflected as dom properties
                  to[attributeName] = from[attributeName];
                }
                if (fromLiveValue) {
                    if (!ignoreUpdate) {
                        // TODO: do we really want this? tests say so but it feels wrong
                        to.setAttribute(attributeName, fromLiveValue);
                    }
                } else {
                    if (!ignoreAttribute(attributeName, to, 'remove', ctx)) {
                        to.removeAttribute(attributeName);
                    }
                }
            }
        }

        /**
         * NB: many bothans died to bring us information:
         *
         *  https://github.com/patrick-steele-idem/morphdom/blob/master/src/specialElHandlers.js
         *  https://github.com/choojs/nanomorph/blob/master/lib/morph.jsL113
         *
         * @param {Node} from the element to sync the input value from
         * @param {Node} to the element to sync the input value to
         * @param {MorphContext} ctx the merge context
         */
        function syncInputValue(from, to, ctx) {
            if (from instanceof HTMLInputElement &&
                to instanceof HTMLInputElement &&
                from.type !== 'file') {

                let fromValue = from.value;
                let toValue = to.value;

                // sync boolean attributes
                syncBooleanAttribute(from, to, 'checked', ctx);
                syncBooleanAttribute(from, to, 'disabled', ctx);

                if (!from.hasAttribute('value')) {
                    if (!ignoreAttribute('value', to, 'remove', ctx)) {
                        to.value = '';
                        to.removeAttribute('value');
                    }
                } else if (fromValue !== toValue) {
                    if (!ignoreAttribute('value', to, 'update', ctx)) {
                        to.setAttribute('value', fromValue);
                        to.value = fromValue;
                    }
                }
            // TODO: QUESTION(1cg): this used to only check `from` unlike the other branches -- why?
            // did I break something?
            } else if (from instanceof HTMLOptionElement && to instanceof HTMLOptionElement) {
                syncBooleanAttribute(from, to, 'selected', ctx)
            } else if (from instanceof HTMLTextAreaElement && to instanceof HTMLTextAreaElement) {
                let fromValue = from.value;
                let toValue = to.value;
                if (ignoreAttribute('value', to, 'update', ctx)) {
                    return;
                }
                if (fromValue !== toValue) {
                    to.value = fromValue;
                }
                if (to.firstChild && to.firstChild.nodeValue !== fromValue) {
                    to.firstChild.nodeValue = fromValue
                }
            }
        }


        /**
         * =============================================================================
         *  The HEAD tag can be handled specially, either w/ a 'merge' or 'append' style
         * =============================================================================
         * @param {Element} newHeadTag
         * @param {Element} currentHead
         * @param {MorphContext} ctx
         * @returns {Promise<void>[]}
         */
        function handleHeadElement(newHeadTag, currentHead, ctx) {
            /**
             * @type {Node[]}
             */
            let added = []
            /**
             * @type {Element[]}
             */
            let removed = []
            /**
             * @type {Element[]}
             */
            let preserved = []
            /**
             * @type {Element[]}
             */
            let nodesToAppend = []

            let headMergeStyle = ctx.head.style;

            // put all new head elements into a Map, by their outerHTML
            let srcToNewHeadNodes = new Map();
            for (const newHeadChild of newHeadTag.children) {
                srcToNewHeadNodes.set(newHeadChild.outerHTML, newHeadChild);
            }

            // for each elt in the current head
            for (const currentHeadElt of currentHead.children) {

                // If the current head element is in the map
                let inNewContent = srcToNewHeadNodes.has(currentHeadElt.outerHTML);
                let isReAppended = ctx.head.shouldReAppend(currentHeadElt);
                let isPreserved = ctx.head.shouldPreserve(currentHeadElt);
                if (inNewContent || isPreserved) {
                    if (isReAppended) {
                        // remove the current version and let the new version replace it and re-execute
                        removed.push(currentHeadElt);
                    } else {
                        // this element already exists and should not be re-appended, so remove it from
                        // the new content map, preserving it in the DOM
                        srcToNewHeadNodes.delete(currentHeadElt.outerHTML);
                        preserved.push(currentHeadElt);
                    }
                } else {
                    if (headMergeStyle === "append") {
                        // we are appending and this existing element is not new content
                        // so if and only if it is marked for re-append do we do anything
                        if (isReAppended) {
                            removed.push(currentHeadElt);
                            nodesToAppend.push(currentHeadElt);
                        }
                    } else {
                        // if this is a merge, we remove this content since it is not in the new head
                        if (ctx.head.shouldRemove(currentHeadElt) !== false) {
                            removed.push(currentHeadElt);
                        }
                    }
                }
            }

            // Push the remaining new head elements in the Map into the
            // nodes to append to the head tag
            nodesToAppend.push(...srcToNewHeadNodes.values());
            log("to append: ", nodesToAppend);

            let promises = [];
            for (const newNode of nodesToAppend) {
                log("adding: ", newNode);
                // TODO: This could theoretically be null, based on type
                let newElt = /** @type {ChildNode} */ (
                  document.createRange().createContextualFragment(newNode.outerHTML).firstChild);
                log(newElt);
                if (ctx.callbacks.beforeNodeAdded(newElt) !== false) {
                    if (('href' in newElt && newElt.href) || ('src' in newElt && newElt.src)) {
                        /** @type {(result?: any) => void} */ let resolve;
                        let promise = new Promise(function (_resolve) {
                            resolve = _resolve;
                        });
                        newElt.addEventListener('load', function () {
                            resolve();
                        });
                        promises.push(promise);
                    }
                    currentHead.appendChild(newElt);
                    ctx.callbacks.afterNodeAdded(newElt);
                    added.push(newElt);
                }
            }

            // remove all removed elements, after we have appended the new elements to avoid
            // additional network requests for things like style sheets
            for (const removedElement of removed) {
                if (ctx.callbacks.beforeNodeRemoved(removedElement) !== false) {
                    currentHead.removeChild(removedElement);
                    ctx.callbacks.afterNodeRemoved(removedElement);
                }
            }

            ctx.head.afterHeadMorphed(currentHead, {added: added, kept: preserved, removed: removed});
            return promises;
        }

        //=============================================================================
        // Misc
        //=============================================================================

        /**
         * @param {any[]} _args
         */
        function log(..._args) {
            //console.log(args);
        }

        function noOp() {
        }


        /**
         * Deep merges the config object and the Idiomoroph.defaults object to
         * produce a final configuration object
         * @param {Config} config
         * @returns {ConfigInternal}
         */
        function mergeDefaults(config) {
            /**
             * @type {ConfigInternal}
             */
            let finalConfig= Object.assign({}, defaults);

            // copy top level stuff into final config
            Object.assign(finalConfig, config);

            // copy callbacks into final config (do this to deep merge the callbacks)
            finalConfig.callbacks = Object.assign({}, defaults.callbacks, config.callbacks);

            // copy head config into final config  (do this to deep merge the head)
            finalConfig.head = Object.assign({}, defaults.head, config.head);

            return finalConfig;
        }

        /**
         *
         * @param {Element} oldNode
         * @param {Element} newContent
         * @param {Config} config
         * @returns {MorphContext}
         */
        function createMorphContext(oldNode, newContent, config) {
            const mergedConfig = mergeDefaults(config);
            return {
                target: oldNode,
                newContent: newContent,
                config: mergedConfig,
                morphStyle: mergedConfig.morphStyle,
                ignoreActive: mergedConfig.ignoreActive,
                ignoreActiveValue: mergedConfig.ignoreActiveValue,
                idMap: createIdMap(oldNode, newContent),
                deadIds: new Set(),
                callbacks: mergedConfig.callbacks,
                head: mergedConfig.head
            }
        }

        /**
         *
         * @param {Node | null} node1
         * @param {Node | null} node2
         * @param {MorphContext} ctx
         * @returns {boolean}
         */
        // TODO: The function handles this as if it's Element or null, but the function is called in
        //   places where the arguments may be just a Node, not an Element
        function isIdSetMatch(node1, node2, ctx) {
            if (node1 == null || node2 == null) {
                return false;
            }
            if ((node1 instanceof Element) && (node2 instanceof Element) &&
                    node1.tagName === node2.tagName) {
                if (node1.id !== "" && node1.id === node2.id) {
                    return true;
                } else {
                    return getIdIntersectionCount(ctx, node1, node2) > 0;
                }
            }
            return false;
        }

        /**
         *
         * @param {Node | null} node1
         * @param {Node | null} node2
         * @returns {boolean}
         */
        function isSoftMatch(node1, node2) {
            if (node1 == null || node2 == null) {
                return false;
            }
            return node1.nodeType === node2.nodeType &&
              // ok to cast: if one is not element, `tagName` will be undefined and we'll compare that
              /** @type {Element} */ (node1).tagName === /** @type {Element} */ (node2).tagName
        }

        /**
         *
         * @param {Node} startInclusive
         * @param {Node} endExclusive
         * @param {MorphContext} ctx
         * @returns {Node | null}
         */
        function removeNodesBetween(startInclusive, endExclusive, ctx) {
            /** @type {Node | null} */ let cursor = startInclusive;
            while (cursor !== endExclusive) {
                let tempNode = /** @type {Node} */ (cursor);
                // TODO: Prefer assigning to a new variable here or expand the type of startInclusive
                //  to be Node | null
                cursor = tempNode.nextSibling;
                removeNode(tempNode, ctx);
            }
            removeIdsFromConsideration(ctx, endExclusive);
            return endExclusive.nextSibling;
        }


        /**
         * =============================================================================
         *  Scans forward from the insertionPoint in the old parent looking for a potential id match
         *  for the newChild.  We stop if we find a potential id match for the new child OR
         *  if the number of potential id matches we are discarding is greater than the
         *  potential id matches for the new child
         * =============================================================================
         * @param {Node} newContent
         * @param {Node} oldParent
         * @param {Node} newChild
         * @param {Node} insertionPoint
         * @param {MorphContext} ctx
         * @returns {null | Node}
         */
        function findIdSetMatch(newContent, oldParent, newChild, insertionPoint, ctx) {

            // max id matches we are willing to discard in our search
            let newChildPotentialIdCount = getIdIntersectionCount(ctx, newChild, oldParent);

            /**
             * @type {Node | null}
             */
            let potentialMatch = null;

            // only search forward if there is a possibility of an id match
            if (newChildPotentialIdCount > 0) {

                // TODO: This is ghosting the potentialMatch variable outside of this block.
                //   Probably an error
                potentialMatch = insertionPoint;
                // if there is a possibility of an id match, scan forward
                // keep track of the potential id match count we are discarding (the
                // newChildPotentialIdCount must be greater than this to make it likely
                // worth it)
                let otherMatchCount = 0;
                while (potentialMatch != null) {

                    // If we have an id match, return the current potential match
                    if (isIdSetMatch(newChild, potentialMatch, ctx)) {
                        return potentialMatch;
                    }

                    // computer the other potential matches of this new content
                    otherMatchCount += getIdIntersectionCount(ctx, potentialMatch, newContent);
                    if (otherMatchCount > newChildPotentialIdCount) {
                        // if we have more potential id matches in _other_ content, we
                        // do not have a good candidate for an id match, so return null
                        return null;
                    }

                    // advanced to the next old content child
                    potentialMatch = potentialMatch.nextSibling;
                }
            }
            return potentialMatch;
        }


        /**
         * =============================================================================
         *  Scans forward from the insertionPoint in the old parent looking for a potential soft match
         *  for the newChild.  We stop if we find a potential soft match for the new child OR
         *  if we find a potential id match in the old parents children OR if we find two
         *  potential soft matches for the next two pieces of new content
         * =============================================================================
         * @param {Node} newContent
         * @param {Node} oldParent
         * @param {Node} newChild
         * @param {Node} insertionPoint
         * @param {MorphContext} ctx
         * @returns {null | Node}
         */
        function findSoftMatch(newContent, oldParent, newChild, insertionPoint, ctx) {

            /**
             * @type {Node | null}
             */
            let potentialSoftMatch = insertionPoint;
            /**
             * @type {Node | null}
             */
            let nextSibling = newChild.nextSibling;
            let siblingSoftMatchCount = 0;

            while (potentialSoftMatch != null) {

                if (getIdIntersectionCount(ctx, potentialSoftMatch, newContent) > 0) {
                    // the current potential soft match has a potential id set match with the remaining new
                    // content so bail out of looking
                    return null;
                }

                // if we have a soft match with the current node, return it
                if (isSoftMatch(newChild, potentialSoftMatch)) {
                    return potentialSoftMatch;
                }

                if (isSoftMatch(nextSibling, potentialSoftMatch)) {
                    // the next new node has a soft match with this node, so
                    // increment the count of future soft matches
                    siblingSoftMatchCount++;
                    // ok to cast: if it was null it couldn't be a soft match
                    nextSibling = /** @type {Node} */ (nextSibling).nextSibling;

                    // If there are two future soft matches, bail to allow the siblings to soft match
                    // so that we don't consume future soft matches for the sake of the current node
                    if (siblingSoftMatchCount >= 2) {
                        return null;
                    }
                }

                // advanced to the next old content child
                potentialSoftMatch = potentialSoftMatch.nextSibling;
            }

            return potentialSoftMatch;
        }

        /** @type {WeakSet<Node>} */
        const generatedByIdiomorph = new WeakSet();

        /**
         *
         * @param {string} newContent
         * @returns {Node | null | DocumentFragment}
         */
        function parseContent(newContent) {
            let parser = new DOMParser();

            // remove svgs to avoid false-positive matches on head, etc.
            let contentWithSvgsRemoved = newContent.replace(/<svg(\s[^>]*>|>)([\s\S]*?)<\/svg>/gim, '');

            // if the newContent contains a html, head or body tag, we can simply parse it w/o wrapping
            if (contentWithSvgsRemoved.match(/<\/html>/) || contentWithSvgsRemoved.match(/<\/head>/) || contentWithSvgsRemoved.match(/<\/body>/)) {
                let content = parser.parseFromString(newContent, "text/html");
                // if it is a full HTML document, return the document itself as the parent container
                if (contentWithSvgsRemoved.match(/<\/html>/)) {
                    generatedByIdiomorph.add(content);
                    return content;
                } else {
                    // otherwise return the html element as the parent container
                    let htmlElement = content.firstChild;
                    if (htmlElement) {
                        generatedByIdiomorph.add(htmlElement);
                        return htmlElement;
                    } else {
                        return null;
                    }
                }
            } else {
                // if it is partial HTML, wrap it in a template tag to provide a parent element and also to help
                // deal with touchy tags like tr, tbody, etc.
                let responseDoc = parser.parseFromString("<body><template>" + newContent + "</template></body>", "text/html");
                let content = /** @type {HTMLTemplateElement} */ (responseDoc.body.querySelector('template')).content;
                generatedByIdiomorph.add(content);
                return content
            }
        }

        /**
         *
         * @param {null | Node | HTMLCollection | Node[] | Document & {generatedByIdiomorph:boolean}} newContent
         * @returns {Element}
         */
        function normalizeContent(newContent) {
            if (newContent == null) {
                // noinspection UnnecessaryLocalVariableJS
                const dummyParent = document.createElement('div');
                return dummyParent;
            } else if (generatedByIdiomorph.has(/** @type {Element} */ (newContent))) {
                // the template tag created by idiomorph parsing can serve as a dummy parent
                return /** @type {Element} */ (newContent);
            } else if (newContent instanceof Node) {
                // a single node is added as a child to a dummy parent
                const dummyParent = document.createElement('div');
                dummyParent.append(newContent);
                return dummyParent;
            } else {
                // all nodes in the array or HTMLElement collection are consolidated under
                // a single dummy parent element
                const dummyParent = document.createElement('div');
                for (const elt of [...newContent]) {
                    dummyParent.append(elt);
                }
                return dummyParent;
            }
        }

        /**
         *
         * @param {Node | null} previousSibling
         * @param {Node} morphedNode
         * @param {Node | null} nextSibling
         * @returns {Node[]}
         */
        function insertSiblings(previousSibling, morphedNode, nextSibling) {
            /**
             * @type {Node[]}
             */
            let stack = []
            /**
             * @type {Node[]}
             */
            let added = []
            while (previousSibling != null) {
                stack.push(previousSibling);
                previousSibling = previousSibling.previousSibling;
            }
            // Base the loop on the node variable, so that you do not need runtime checks for
            // undefined value inside the loop
            let node = stack.pop();
            while (node !== undefined) {
                added.push(node); // push added preceding siblings on in order and insert
                morphedNode.parentElement?.insertBefore(node, morphedNode);
                node = stack.pop();
            }
            added.push(morphedNode);
            while (nextSibling != null) {
                stack.push(nextSibling);
                added.push(nextSibling); // here we are going in order, so push on as we scan, rather than add
                nextSibling = nextSibling.nextSibling;
            }
            while (stack.length > 0) {
                const node = /** @type {Node} */ (stack.pop());
                morphedNode.parentElement?.insertBefore(node, morphedNode.nextSibling);
            }
            return added;
        }

        /**
         *
         * @param {Element} newContent
         * @param {Element} oldNode
         * @param {MorphContext} ctx
         * @returns {Node | null}
         */
        function findBestNodeMatch(newContent, oldNode, ctx) {
            /**
             * @type {Node | null}
             */
            let currentElement;
            currentElement = newContent.firstChild;
            /**
             * @type {Node | null}
             */
            let bestElement = currentElement;
            let score = 0;
            while (currentElement) {
                let newScore = scoreElement(currentElement, oldNode, ctx);
                if (newScore > score) {
                    bestElement = currentElement;
                    score = newScore;
                }
                currentElement = currentElement.nextSibling;
            }
            return bestElement;
        }

        /**
         *
         * @param {Node | null} node1
         * @param {Element} node2
         * @param {MorphContext} ctx
         * @returns {number}
         */
        // TODO: The function handles node1 and node2 as if they are Elements but the function is
        //   called in places where node1 and node2 may be just Nodes, not Elements
        function scoreElement(node1, node2, ctx) {
            if (isSoftMatch(node1, node2)) {
                // ok to cast: isSoftMatch performs a null check
                return .5 + getIdIntersectionCount(ctx, /** @type {Node} */ (node1), node2);
            }
            return 0;
        }

        /**
         *
         * @param {Node} tempNode
         * @param {MorphContext} ctx
         */
        // TODO: The function handles tempNode as if it's Element but the function is called in
        //   places where tempNode may be just a Node, not an Element
        function removeNode(tempNode, ctx) {
            removeIdsFromConsideration(ctx, tempNode)
            if (ctx.callbacks.beforeNodeRemoved(tempNode) === false) return;

            tempNode.parentNode?.removeChild(tempNode);
            ctx.callbacks.afterNodeRemoved(tempNode);
        }

        //=============================================================================
        // ID Set Functions
        //=============================================================================

        /**
         *
         * @param {MorphContext} ctx
         * @param {string} id
         * @returns {boolean}
         */
        function isIdInConsideration(ctx, id) {
            return !ctx.deadIds.has(id);
        }

        /**
         *
         * @param {MorphContext} ctx
         * @param {string} id
         * @param {Node} targetNode
         * @returns {boolean}
         */
        function idIsWithinNode(ctx, id, targetNode) {
            let idSet = ctx.idMap.get(targetNode) || EMPTY_SET;
            return idSet.has(id);
        }

        /**
         *
         * @param {MorphContext} ctx
         * @param {Node} node
         * @returns {void}
         */
        function removeIdsFromConsideration(ctx, node) {
            let idSet = ctx.idMap.get(node) || EMPTY_SET;
            for (const id of idSet) {
                ctx.deadIds.add(id);
            }
        }

        /**
         *
         * @param {MorphContext} ctx
         * @param {Node} node1
         * @param {Node} node2
         * @returns {number}
         */
        function getIdIntersectionCount(ctx, node1, node2) {
            let sourceSet = ctx.idMap.get(node1) || EMPTY_SET;
            let matchCount = 0;
            for (const id of sourceSet) {
                // a potential match is an id in the source and potentialIdsSet, but
                // that has not already been merged into the DOM
                if (isIdInConsideration(ctx, id) && idIsWithinNode(ctx, id, node2)) {
                    ++matchCount;
                }
            }
            return matchCount;
        }

        /**
         * A bottom up algorithm that finds all elements with ids inside of the node
         * argument and populates id sets for those nodes and all their parents, generating
         * a set of ids contained within all nodes for the entire hierarchy in the DOM
         *
         * @param {Element} node
         * @param {Map<Node, Set<string>>} idMap
         */
        function populateIdMapForNode(node, idMap) {
            let nodeParent = node.parentElement;
            // find all elements with an id property
            let idElements = node.querySelectorAll('[id]');
            for (const elt of idElements) {
                /**
                 * @type {Element|null}
                 */
                let current = elt;
                // walk up the parent hierarchy of that element, adding the id
                // of element to the parent's id set
                while (current !== nodeParent && current != null) {
                    let idSet = idMap.get(current);
                    // if the id set doesn't exist, create it and insert it in the  map
                    if (idSet == null) {
                        idSet = new Set();
                        idMap.set(current, idSet);
                    }
                    idSet.add(elt.id);
                    current = current.parentElement;
                }
            }
        }

        /**
         * This function computes a map of nodes to all ids contained within that node (inclusive of the
         * node).  This map can be used to ask if two nodes have intersecting sets of ids, which allows
         * for a looser definition of "matching" than tradition id matching, and allows child nodes
         * to contribute to a parent nodes matching.
         *
         * @param {Element} oldContent  the old content that will be morphed
         * @param {Element} newContent  the new content to morph to
         * @returns {Map<Node, Set<string>>} a map of nodes to id sets for the
         */
        function createIdMap(oldContent, newContent) {
            /**
             *
             * @type {Map<Node, Set<string>>}
             */
            let idMap = new Map();
            populateIdMapForNode(oldContent, idMap);
            populateIdMapForNode(newContent, idMap);
            return idMap;
        }

        //=============================================================================
        // This is what ends up becoming the Idiomorph global object
        //=============================================================================
        return {
            morph,
            defaults
        }
    })();

                
                /**
 * @typedef {object} ConfigHead
 *
 * @property {'merge' | 'append' | 'morph' | 'none'} [style]
 * @property {boolean} [block]
 * @property {boolean} [ignore]
 * @property {function(Element): boolean} [shouldPreserve]
 * @property {function(Element): boolean} [shouldReAppend]
 * @property {function(Element): boolean} [shouldRemove]
 * @property {function(Element, {added: Node[], kept: Element[], removed: Element[]}): void} [afterHeadMorphed]
 */

/**
 * @typedef {object} ConfigCallbacks
 *
 * @property {function(Node): boolean} [beforeNodeAdded]
 * @property {function(Node): void} [afterNodeAdded]
 * @property {function(Element, Node): boolean} [beforeNodeMorphed]
 * @property {function(Element, Node): void} [afterNodeMorphed]
 * @property {function(Element): boolean} [beforeNodeRemoved]
 * @property {function(Element): void} [afterNodeRemoved]
 * @property {function(string, Element, "update" | "remove"): boolean} [beforeAttributeUpdated]
 */

/**
 * @typedef {object} Config
 *
 * @property {'outerHTML' | 'innerHTML'} [morphStyle]
 * @property {boolean} [ignoreActive]
 * @property {boolean} [ignoreActiveValue]
 * @property {ConfigCallbacks} [callbacks]
 * @property {ConfigHead} [head]
 */

/**
 * @typedef {function} NoOp
 *
 * @returns {void}
 */

/**
 * @typedef {object} ConfigHeadInternal
 *
 * @property {'merge' | 'append' | 'morph' | 'none'} style
 * @property {boolean} [block]
 * @property {boolean} [ignore]
 * @property {(function(Element): boolean) | NoOp} shouldPreserve
 * @property {(function(Element): boolean) | NoOp} shouldReAppend
 * @property {(function(Element): boolean) | NoOp} shouldRemove
 * @property {(function(Element, {added: Node[], kept: Element[], removed: Element[]}): void) | NoOp} afterHeadMorphed
 */

/**
 * @typedef {object} ConfigCallbacksInternal
 *
 * @property {(function(Node): boolean) | NoOp} beforeNodeAdded
 * @property {(function(Node): void) | NoOp} afterNodeAdded
 * @property {(function(Node, Node): boolean) | NoOp} beforeNodeMorphed
 * @property {(function(Node, Node): void) | NoOp} afterNodeMorphed
 * @property {(function(Node): boolean) | NoOp} beforeNodeRemoved
 * @property {(function(Node): void) | NoOp} afterNodeRemoved
 * @property {(function(string, Element, "update" | "remove"): boolean) | NoOp} beforeAttributeUpdated
 */

/**
 * @typedef {object} ConfigInternal
 *
 * @property {'outerHTML' | 'innerHTML'} morphStyle
 * @property {boolean} [ignoreActive]
 * @property {boolean} [ignoreActiveValue]
 * @property {ConfigCallbacksInternal} callbacks
 * @property {ConfigHeadInternal} head
 */

/**
 * @typedef {Function} Morph
 *
 * @param {Element | Document} oldNode
 * @param {Element | Node | HTMLCollection | Node[] | string | null} newContent
 * @param {Config} [config]
 * @returns {undefined | HTMLCollection | Node[]}
 */

// base IIFE to define idiomorph
/**
 *
 * @type {{defaults: ConfigInternal, morph: Morph}}
 */
window.Idiomorph.original = (function () {
        'use strict';

        /**
         * @typedef {object} MorphContext
         *
         * @property {Node} target
         * @property {Node} newContent
         * @property {ConfigInternal} config
         * @property {ConfigInternal['morphStyle']} morphStyle
         * @property {ConfigInternal['ignoreActive']} ignoreActive
         * @property {ConfigInternal['ignoreActiveValue']} ignoreActiveValue
         * @property {Map<Node, Set<string>>} idMap
         * @property {Set<string>} deadIds
         * @property {ConfigInternal['callbacks']} callbacks
         * @property {ConfigInternal['head']} head
         */

        //=============================================================================
        // AND NOW IT BEGINS...
        //=============================================================================

        /**
         *
         * @type {Set<string>}
         */
        let EMPTY_SET = new Set();

        /**
         * Default configuration values, updatable by users now
         * @type {ConfigInternal}
         */
        let defaults = {
            morphStyle: "outerHTML",
            callbacks : {
                beforeNodeAdded: noOp,
                afterNodeAdded: noOp,
                beforeNodeMorphed: noOp,
                afterNodeMorphed: noOp,
                beforeNodeRemoved: noOp,
                afterNodeRemoved: noOp,
                beforeAttributeUpdated: noOp,

            },
            head: {
                style: 'merge',
                shouldPreserve: function (elt) {
                    return elt.getAttribute("im-preserve") === "true";
                },
                shouldReAppend: function (elt) {
                    return elt.getAttribute("im-re-append") === "true";
                },
                shouldRemove: noOp,
                afterHeadMorphed: noOp,
            }
        };


        /**
         * =============================================================================
         * Core Morphing Algorithm - morph, morphNormalizedContent, morphOldNodeTo, morphChildren
         * =============================================================================
         *
         * @param {Element | Document} oldNode
         * @param {Element | Node | HTMLCollection | Node[] | string | null} newContent
         * @param {Config} [config]
         * @returns {undefined | HTMLCollection | Node[]}
         */
        function morph(oldNode, newContent, config = {}) {

            if (oldNode instanceof Document) {
                oldNode = oldNode.documentElement;
            }

            if (typeof newContent === 'string') {
                newContent = parseContent(newContent);
            }

            let normalizedContent = normalizeContent(newContent);

            let ctx = createMorphContext(oldNode, normalizedContent, config);

            return morphNormalizedContent(oldNode, normalizedContent, ctx);
        }

        /**
         *
         * @param {Element} oldNode
         * @param {Element} normalizedNewContent
         * @param {MorphContext} ctx
         * @returns {undefined | HTMLCollection| Node[]}
         */
        function morphNormalizedContent(oldNode, normalizedNewContent, ctx) {
            if (ctx.head.block) {
                let oldHead = oldNode.querySelector('head');
                let newHead = normalizedNewContent.querySelector('head');
                if (oldHead && newHead) {
                    let promises = handleHeadElement(newHead, oldHead, ctx);
                    // when head promises resolve, call morph again, ignoring the head tag
                    Promise.all(promises).then(function () {
                        morphNormalizedContent(oldNode, normalizedNewContent, Object.assign(ctx, {
                            head: {
                                block: false,
                                ignore: true
                            }
                        }));
                    });
                    return;
                }
            }

            if (ctx.morphStyle === "innerHTML") {

                // innerHTML, so we are only updating the children
                morphChildren(normalizedNewContent, oldNode, ctx);
                return Array.from(oldNode.children);

            } else if (ctx.morphStyle === "outerHTML" || ctx.morphStyle == null) {
                // otherwise find the best element match in the new content, morph that, and merge its siblings
                // into either side of the best match
                let bestMatch = findBestNodeMatch(normalizedNewContent, oldNode, ctx);

                // stash the siblings that will need to be inserted on either side of the best match
                let previousSibling = bestMatch?.previousSibling ?? null;
                let nextSibling = bestMatch?.nextSibling ?? null;

                // morph it
                let morphedNode = morphOldNodeTo(oldNode, bestMatch, ctx);

                if (bestMatch) {
                    // if there was a best match, merge the siblings in too and return the
                    // whole bunch
                    if (morphedNode) {
                        return insertSiblings(previousSibling, morphedNode, nextSibling);
                    }
                } else {
                    // otherwise nothing was added to the DOM
                    return []
                }
            } else {
                throw "Do not understand how to morph style " + ctx.morphStyle;
            }
        }


        /**
         * @param {Node} possibleActiveElement
         * @param {MorphContext} ctx
         * @returns {boolean}
         */
        // TODO: ignoreActive and ignoreActiveValue are marked as optional since they are not
        //   initialised in the default config object. As a result the && in the function body may
        //   return undefined instead of boolean. Either expand the type of the return value to
        //   include undefined or wrap the ctx.ignoreActiveValue into a Boolean()
        function ignoreValueOfActiveElement(possibleActiveElement, ctx) {
            return !!ctx.ignoreActiveValue && possibleActiveElement === document.activeElement && possibleActiveElement !== document.body;
        }

        /**
         * @param {Node} oldNode root node to merge content into
         * @param {Node | null} newContent new content to merge
         * @param {MorphContext} ctx the merge context
         * @returns {Node | null} the element that ended up in the DOM
         */
        function morphOldNodeTo(oldNode, newContent, ctx) {
            if (ctx.ignoreActive && oldNode === document.activeElement) {
                // don't morph focused element
            } else if (newContent == null) {
                if (ctx.callbacks.beforeNodeRemoved(oldNode) === false) return oldNode;

                oldNode.parentNode?.removeChild(oldNode);
                ctx.callbacks.afterNodeRemoved(oldNode);
                return null;
            } else if (!isSoftMatch(oldNode, newContent)) {
                if (ctx.callbacks.beforeNodeRemoved(oldNode) === false) return oldNode;
                if (ctx.callbacks.beforeNodeAdded(newContent) === false) return oldNode;

                oldNode.parentNode?.replaceChild(newContent, oldNode);
                ctx.callbacks.afterNodeAdded(newContent);
                ctx.callbacks.afterNodeRemoved(oldNode);
                return newContent;
            } else {
                if (ctx.callbacks.beforeNodeMorphed(oldNode, newContent) === false) return oldNode;

                if (oldNode instanceof HTMLHeadElement && ctx.head.ignore) {
                    // ignore the head element
                } else if (oldNode instanceof HTMLHeadElement && ctx.head.style !== "morph") {
                    // ok to cast: if newContent wasn't also a <head>, it would've got caught in the `!isSoftMatch` branch above
                    handleHeadElement(/** @type {HTMLHeadElement} */ (newContent), oldNode, ctx);
                } else {
                    syncNodeFrom(newContent, oldNode, ctx);
                    if (!ignoreValueOfActiveElement(oldNode, ctx)) {
                        morphChildren(newContent, oldNode, ctx);
                    }
                }
                ctx.callbacks.afterNodeMorphed(oldNode, newContent);
                return oldNode;
            }
            return null;
        }

        /**
         * This is the core algorithm for matching up children.  The idea is to use id sets to try to match up
         * nodes as faithfully as possible.  We greedily match, which allows us to keep the algorithm fast, but
         * by using id sets, we are able to better match up with content deeper in the DOM.
         *
         * Basic algorithm is, for each node in the new content:
         *
         * - if we have reached the end of the old parent, append the new content
         * - if the new content has an id set match with the current insertion point, morph
         * - search for an id set match
         * - if id set match found, morph
         * - otherwise search for a "soft" match
         * - if a soft match is found, morph
         * - otherwise, prepend the new node before the current insertion point
         *
         * The two search algorithms terminate if competing node matches appear to outweigh what can be achieved
         * with the current node.  See findIdSetMatch() and findSoftMatch() for details.
         *
         * @param {Node} newParent the parent element of the new content
         * @param {Node} oldParent the old content that we are merging the new content into
         * @param {MorphContext} ctx the merge context
         * @returns {void}
         */
        function morphChildren(newParent, oldParent, ctx) {
            if (newParent instanceof HTMLTemplateElement && oldParent instanceof HTMLTemplateElement) {
              newParent = newParent.content;
              oldParent = oldParent.content;
            }

            /**
             *
             * @type {Node | null}
             */
            let nextNewChild = newParent.firstChild;
            /**
             *
             * @type {Node | null}
             */
            let insertionPoint = oldParent.firstChild;
            let newChild;

            // run through all the new content
            while (nextNewChild) {

                newChild = nextNewChild;
                nextNewChild = newChild.nextSibling;

                // if we are at the end of the exiting parent's children, just append
                if (insertionPoint == null) {
                    if (ctx.callbacks.beforeNodeAdded(newChild) === false) continue;

                    oldParent.appendChild(newChild);
                    ctx.callbacks.afterNodeAdded(newChild);
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // if the current node has an id set match then morph
                if (isIdSetMatch(newChild, insertionPoint, ctx)) {
                    morphOldNodeTo(insertionPoint, newChild, ctx);
                    insertionPoint = insertionPoint.nextSibling;
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // otherwise search forward in the existing old children for an id set match
                let idSetMatch = findIdSetMatch(newParent, oldParent, newChild, insertionPoint, ctx);

                // if we found a potential match, remove the nodes until that point and morph
                if (idSetMatch) {
                    insertionPoint = removeNodesBetween(insertionPoint, idSetMatch, ctx);
                    morphOldNodeTo(idSetMatch, newChild, ctx);
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // no id set match found, so scan forward for a soft match for the current node
                let softMatch = findSoftMatch(newParent, oldParent, newChild, insertionPoint, ctx);

                // if we found a soft match for the current node, morph
                if (softMatch) {
                    insertionPoint = removeNodesBetween(insertionPoint, softMatch, ctx);
                    morphOldNodeTo(softMatch, newChild, ctx);
                    removeIdsFromConsideration(ctx, newChild);
                    continue;
                }

                // abandon all hope of morphing, just insert the new child before the insertion point
                // and move on
                if (ctx.callbacks.beforeNodeAdded(newChild) === false) continue;

                oldParent.insertBefore(newChild, insertionPoint);
                ctx.callbacks.afterNodeAdded(newChild);
                removeIdsFromConsideration(ctx, newChild);
            }

            // remove any remaining old nodes that didn't match up with new content
            while (insertionPoint !== null) {

                let tempNode = insertionPoint;
                insertionPoint = insertionPoint.nextSibling;
                removeNode(tempNode, ctx);
            }
        }

        //=============================================================================
        // Attribute Syncing Code
        //=============================================================================

        /**
         * @param {string} attr the attribute to be mutated
         * @param {Element} to the element that is going to be updated
         * @param {"update" | "remove"} updateType
         * @param {MorphContext} ctx the merge context
         * @returns {boolean} true if the attribute should be ignored, false otherwise
         */
        function ignoreAttribute(attr, to, updateType, ctx) {
            if(attr === 'value' && ctx.ignoreActiveValue && to === document.activeElement){
                return true;
            }
            return ctx.callbacks.beforeAttributeUpdated(attr, to, updateType) === false;
        }

        /**
         * syncs a given node with another node, copying over all attributes and
         * inner element state from the 'from' node to the 'to' node
         *
         * @param {Node} from the element to copy attributes & state from
         * @param {Node} to the element to copy attributes & state to
         * @param {MorphContext} ctx the merge context
         */
        function syncNodeFrom(from, to, ctx) {
            let type = from.nodeType

            // if is an element type, sync the attributes from the
            // new node into the new node
            if (type === 1 /* element type */) {
                const fromEl = /** @type {Element} */ (from);
                const toEl = /** @type {Element} */ (to);
                const fromAttributes = fromEl.attributes;
                const toAttributes = toEl.attributes;
                for (const fromAttribute of fromAttributes) {
                    if (ignoreAttribute(fromAttribute.name, toEl, 'update', ctx)) {
                        continue;
                    }
                    if (toEl.getAttribute(fromAttribute.name) !== fromAttribute.value) {
                        toEl.setAttribute(fromAttribute.name, fromAttribute.value);
                    }
                }
                // iterate backwards to avoid skipping over items when a delete occurs
                for (let i = toAttributes.length - 1; 0 <= i; i--) {
                    const toAttribute = toAttributes[i];
                    if (!fromEl.hasAttribute(toAttribute.name)) {
                        if (ignoreAttribute(toAttribute.name, toEl, 'remove', ctx)) {
                            continue;
                        }
                        toEl.removeAttribute(toAttribute.name);
                    }
                }
            }

            // sync text nodes
            if (type === 8 /* comment */ || type === 3 /* text */) {
                if (to.nodeValue !== from.nodeValue) {
                    to.nodeValue = from.nodeValue;
                }
            }

            if (!ignoreValueOfActiveElement(to, ctx)) {
                // sync input values
                syncInputValue(from, to, ctx);
            }
        }

        /**
         * @param {Element} from element to sync the value from
         * @param {Element} to element to sync the value to
         * @param {string} attributeName the attribute name
         * @param {MorphContext} ctx the merge context
         */
        function syncBooleanAttribute(from, to, attributeName, ctx) {
            // TODO: prefer set/getAttribute here
            if (!(from instanceof Element && to instanceof Element)) return
            // @ts-ignore this function is only used on boolean attrs that are reflected as dom properties
            const fromLiveValue = from[attributeName], toLiveValue = to[attributeName];
            if (fromLiveValue !== toLiveValue) {
                let ignoreUpdate = ignoreAttribute(attributeName, to, 'update', ctx);
                if (!ignoreUpdate) {
                  // update attribute's associated DOM property
                  // @ts-ignore this function is only used on boolean attrs that are reflected as dom properties
                  to[attributeName] = from[attributeName];
                }
                if (fromLiveValue) {
                    if (!ignoreUpdate) {
                        // TODO: do we really want this? tests say so but it feels wrong
                        to.setAttribute(attributeName, fromLiveValue);
                    }
                } else {
                    if (!ignoreAttribute(attributeName, to, 'remove', ctx)) {
                        to.removeAttribute(attributeName);
                    }
                }
            }
        }

        /**
         * NB: many bothans died to bring us information:
         *
         *  https://github.com/patrick-steele-idem/morphdom/blob/master/src/specialElHandlers.js
         *  https://github.com/choojs/nanomorph/blob/master/lib/morph.jsL113
         *
         * @param {Node} from the element to sync the input value from
         * @param {Node} to the element to sync the input value to
         * @param {MorphContext} ctx the merge context
         */
        function syncInputValue(from, to, ctx) {
            if (from instanceof HTMLInputElement &&
                to instanceof HTMLInputElement &&
                from.type !== 'file') {

                let fromValue = from.value;
                let toValue = to.value;

                // sync boolean attributes
                syncBooleanAttribute(from, to, 'checked', ctx);
                syncBooleanAttribute(from, to, 'disabled', ctx);

                if (!from.hasAttribute('value')) {
                    if (!ignoreAttribute('value', to, 'remove', ctx)) {
                        to.value = '';
                        to.removeAttribute('value');
                    }
                } else if (fromValue !== toValue) {
                    if (!ignoreAttribute('value', to, 'update', ctx)) {
                        to.setAttribute('value', fromValue);
                        to.value = fromValue;
                    }
                }
            // TODO: QUESTION(1cg): this used to only check `from` unlike the other branches -- why?
            // did I break something?
            } else if (from instanceof HTMLOptionElement && to instanceof HTMLOptionElement) {
                syncBooleanAttribute(from, to, 'selected', ctx)
            } else if (from instanceof HTMLTextAreaElement && to instanceof HTMLTextAreaElement) {
                let fromValue = from.value;
                let toValue = to.value;
                if (ignoreAttribute('value', to, 'update', ctx)) {
                    return;
                }
                if (fromValue !== toValue) {
                    to.value = fromValue;
                }
                if (to.firstChild && to.firstChild.nodeValue !== fromValue) {
                    to.firstChild.nodeValue = fromValue
                }
            }
        }


        /**
         * =============================================================================
         *  The HEAD tag can be handled specially, either w/ a 'merge' or 'append' style
         * =============================================================================
         * @param {Element} newHeadTag
         * @param {Element} currentHead
         * @param {MorphContext} ctx
         * @returns {Promise<void>[]}
         */
        function handleHeadElement(newHeadTag, currentHead, ctx) {
            /**
             * @type {Node[]}
             */
            let added = []
            /**
             * @type {Element[]}
             */
            let removed = []
            /**
             * @type {Element[]}
             */
            let preserved = []
            /**
             * @type {Element[]}
             */
            let nodesToAppend = []

            let headMergeStyle = ctx.head.style;

            // put all new head elements into a Map, by their outerHTML
            let srcToNewHeadNodes = new Map();
            for (const newHeadChild of newHeadTag.children) {
                srcToNewHeadNodes.set(newHeadChild.outerHTML, newHeadChild);
            }

            // for each elt in the current head
            for (const currentHeadElt of currentHead.children) {

                // If the current head element is in the map
                let inNewContent = srcToNewHeadNodes.has(currentHeadElt.outerHTML);
                let isReAppended = ctx.head.shouldReAppend(currentHeadElt);
                let isPreserved = ctx.head.shouldPreserve(currentHeadElt);
                if (inNewContent || isPreserved) {
                    if (isReAppended) {
                        // remove the current version and let the new version replace it and re-execute
                        removed.push(currentHeadElt);
                    } else {
                        // this element already exists and should not be re-appended, so remove it from
                        // the new content map, preserving it in the DOM
                        srcToNewHeadNodes.delete(currentHeadElt.outerHTML);
                        preserved.push(currentHeadElt);
                    }
                } else {
                    if (headMergeStyle === "append") {
                        // we are appending and this existing element is not new content
                        // so if and only if it is marked for re-append do we do anything
                        if (isReAppended) {
                            removed.push(currentHeadElt);
                            nodesToAppend.push(currentHeadElt);
                        }
                    } else {
                        // if this is a merge, we remove this content since it is not in the new head
                        if (ctx.head.shouldRemove(currentHeadElt) !== false) {
                            removed.push(currentHeadElt);
                        }
                    }
                }
            }

            // Push the remaining new head elements in the Map into the
            // nodes to append to the head tag
            nodesToAppend.push(...srcToNewHeadNodes.values());
            log("to append: ", nodesToAppend);

            let promises = [];
            for (const newNode of nodesToAppend) {
                log("adding: ", newNode);
                // TODO: This could theoretically be null, based on type
                let newElt = /** @type {ChildNode} */ (
                  document.createRange().createContextualFragment(newNode.outerHTML).firstChild);
                log(newElt);
                if (ctx.callbacks.beforeNodeAdded(newElt) !== false) {
                    if (('href' in newElt && newElt.href) || ('src' in newElt && newElt.src)) {
                        /** @type {(result?: any) => void} */ let resolve;
                        let promise = new Promise(function (_resolve) {
                            resolve = _resolve;
                        });
                        newElt.addEventListener('load', function () {
                            resolve();
                        });
                        promises.push(promise);
                    }
                    currentHead.appendChild(newElt);
                    ctx.callbacks.afterNodeAdded(newElt);
                    added.push(newElt);
                }
            }

            // remove all removed elements, after we have appended the new elements to avoid
            // additional network requests for things like style sheets
            for (const removedElement of removed) {
                if (ctx.callbacks.beforeNodeRemoved(removedElement) !== false) {
                    currentHead.removeChild(removedElement);
                    ctx.callbacks.afterNodeRemoved(removedElement);
                }
            }

            ctx.head.afterHeadMorphed(currentHead, {added: added, kept: preserved, removed: removed});
            return promises;
        }

        //=============================================================================
        // Misc
        //=============================================================================

        /**
         * @param {any[]} _args
         */
        function log(..._args) {
            //console.log(args);
        }

        function noOp() {
        }


        /**
         * Deep merges the config object and the Idiomoroph.defaults object to
         * produce a final configuration object
         * @param {Config} config
         * @returns {ConfigInternal}
         */
        function mergeDefaults(config) {
            /**
             * @type {ConfigInternal}
             */
            let finalConfig= Object.assign({}, defaults);

            // copy top level stuff into final config
            Object.assign(finalConfig, config);

            // copy callbacks into final config (do this to deep merge the callbacks)
            finalConfig.callbacks = Object.assign({}, defaults.callbacks, config.callbacks);

            // copy head config into final config  (do this to deep merge the head)
            finalConfig.head = Object.assign({}, defaults.head, config.head);

            return finalConfig;
        }

        /**
         *
         * @param {Element} oldNode
         * @param {Element} newContent
         * @param {Config} config
         * @returns {MorphContext}
         */
        function createMorphContext(oldNode, newContent, config) {
            const mergedConfig = mergeDefaults(config);
            return {
                target: oldNode,
                newContent: newContent,
                config: mergedConfig,
                morphStyle: mergedConfig.morphStyle,
                ignoreActive: mergedConfig.ignoreActive,
                ignoreActiveValue: mergedConfig.ignoreActiveValue,
                idMap: createIdMap(oldNode, newContent),
                deadIds: new Set(),
                callbacks: mergedConfig.callbacks,
                head: mergedConfig.head
            }
        }

        /**
         *
         * @param {Node | null} node1
         * @param {Node | null} node2
         * @param {MorphContext} ctx
         * @returns {boolean}
         */
        // TODO: The function handles this as if it's Element or null, but the function is called in
        //   places where the arguments may be just a Node, not an Element
        function isIdSetMatch(node1, node2, ctx) {
            if (node1 == null || node2 == null) {
                return false;
            }
            if ((node1 instanceof Element) && (node2 instanceof Element) &&
                    node1.tagName === node2.tagName) {
                if (node1.id !== "" && node1.id === node2.id) {
                    return true;
                } else {
                    return getIdIntersectionCount(ctx, node1, node2) > 0;
                }
            }
            return false;
        }

        /**
         *
         * @param {Node | null} node1
         * @param {Node | null} node2
         * @returns {boolean}
         */
        function isSoftMatch(node1, node2) {
            if (node1 == null || node2 == null) {
                return false;
            }
            return node1.nodeType === node2.nodeType &&
              // ok to cast: if one is not element, `tagName` will be undefined and we'll compare that
              /** @type {Element} */ (node1).tagName === /** @type {Element} */ (node2).tagName
        }

        /**
         *
         * @param {Node} startInclusive
         * @param {Node} endExclusive
         * @param {MorphContext} ctx
         * @returns {Node | null}
         */
        function removeNodesBetween(startInclusive, endExclusive, ctx) {
            /** @type {Node | null} */ let cursor = startInclusive;
            while (cursor !== endExclusive) {
                let tempNode = /** @type {Node} */ (cursor);
                // TODO: Prefer assigning to a new variable here or expand the type of startInclusive
                //  to be Node | null
                cursor = tempNode.nextSibling;
                removeNode(tempNode, ctx);
            }
            removeIdsFromConsideration(ctx, endExclusive);
            return endExclusive.nextSibling;
        }


        /**
         * =============================================================================
         *  Scans forward from the insertionPoint in the old parent looking for a potential id match
         *  for the newChild.  We stop if we find a potential id match for the new child OR
         *  if the number of potential id matches we are discarding is greater than the
         *  potential id matches for the new child
         * =============================================================================
         * @param {Node} newContent
         * @param {Node} oldParent
         * @param {Node} newChild
         * @param {Node} insertionPoint
         * @param {MorphContext} ctx
         * @returns {null | Node}
         */
        function findIdSetMatch(newContent, oldParent, newChild, insertionPoint, ctx) {

            // max id matches we are willing to discard in our search
            let newChildPotentialIdCount = getIdIntersectionCount(ctx, newChild, oldParent);

            /**
             * @type {Node | null}
             */
            let potentialMatch = null;

            // only search forward if there is a possibility of an id match
            if (newChildPotentialIdCount > 0) {

                // TODO: This is ghosting the potentialMatch variable outside of this block.
                //   Probably an error
                potentialMatch = insertionPoint;
                // if there is a possibility of an id match, scan forward
                // keep track of the potential id match count we are discarding (the
                // newChildPotentialIdCount must be greater than this to make it likely
                // worth it)
                let otherMatchCount = 0;
                while (potentialMatch != null) {

                    // If we have an id match, return the current potential match
                    if (isIdSetMatch(newChild, potentialMatch, ctx)) {
                        return potentialMatch;
                    }

                    // computer the other potential matches of this new content
                    otherMatchCount += getIdIntersectionCount(ctx, potentialMatch, newContent);
                    if (otherMatchCount > newChildPotentialIdCount) {
                        // if we have more potential id matches in _other_ content, we
                        // do not have a good candidate for an id match, so return null
                        return null;
                    }

                    // advanced to the next old content child
                    potentialMatch = potentialMatch.nextSibling;
                }
            }
            return potentialMatch;
        }


        /**
         * =============================================================================
         *  Scans forward from the insertionPoint in the old parent looking for a potential soft match
         *  for the newChild.  We stop if we find a potential soft match for the new child OR
         *  if we find a potential id match in the old parents children OR if we find two
         *  potential soft matches for the next two pieces of new content
         * =============================================================================
         * @param {Node} newContent
         * @param {Node} oldParent
         * @param {Node} newChild
         * @param {Node} insertionPoint
         * @param {MorphContext} ctx
         * @returns {null | Node}
         */
        function findSoftMatch(newContent, oldParent, newChild, insertionPoint, ctx) {

            /**
             * @type {Node | null}
             */
            let potentialSoftMatch = insertionPoint;
            /**
             * @type {Node | null}
             */
            let nextSibling = newChild.nextSibling;
            let siblingSoftMatchCount = 0;

            while (potentialSoftMatch != null) {

                if (getIdIntersectionCount(ctx, potentialSoftMatch, newContent) > 0) {
                    // the current potential soft match has a potential id set match with the remaining new
                    // content so bail out of looking
                    return null;
                }

                // if we have a soft match with the current node, return it
                if (isSoftMatch(newChild, potentialSoftMatch)) {
                    return potentialSoftMatch;
                }

                if (isSoftMatch(nextSibling, potentialSoftMatch)) {
                    // the next new node has a soft match with this node, so
                    // increment the count of future soft matches
                    siblingSoftMatchCount++;
                    // ok to cast: if it was null it couldn't be a soft match
                    nextSibling = /** @type {Node} */ (nextSibling).nextSibling;

                    // If there are two future soft matches, bail to allow the siblings to soft match
                    // so that we don't consume future soft matches for the sake of the current node
                    if (siblingSoftMatchCount >= 2) {
                        return null;
                    }
                }

                // advanced to the next old content child
                potentialSoftMatch = potentialSoftMatch.nextSibling;
            }

            return potentialSoftMatch;
        }

        /** @type {WeakSet<Node>} */
        const generatedByIdiomorph = new WeakSet();

        /**
         *
         * @param {string} newContent
         * @returns {Node | null | DocumentFragment}
         */
        function parseContent(newContent) {
            let parser = new DOMParser();

            // remove svgs to avoid false-positive matches on head, etc.
            let contentWithSvgsRemoved = newContent.replace(/<svg(\s[^>]*>|>)([\s\S]*?)<\/svg>/gim, '');

            // if the newContent contains a html, head or body tag, we can simply parse it w/o wrapping
            if (contentWithSvgsRemoved.match(/<\/html>/) || contentWithSvgsRemoved.match(/<\/head>/) || contentWithSvgsRemoved.match(/<\/body>/)) {
                let content = parser.parseFromString(newContent, "text/html");
                // if it is a full HTML document, return the document itself as the parent container
                if (contentWithSvgsRemoved.match(/<\/html>/)) {
                    generatedByIdiomorph.add(content);
                    return content;
                } else {
                    // otherwise return the html element as the parent container
                    let htmlElement = content.firstChild;
                    if (htmlElement) {
                        generatedByIdiomorph.add(htmlElement);
                        return htmlElement;
                    } else {
                        return null;
                    }
                }
            } else {
                // if it is partial HTML, wrap it in a template tag to provide a parent element and also to help
                // deal with touchy tags like tr, tbody, etc.
                let responseDoc = parser.parseFromString("<body><template>" + newContent + "</template></body>", "text/html");
                let content = /** @type {HTMLTemplateElement} */ (responseDoc.body.querySelector('template')).content;
                generatedByIdiomorph.add(content);
                return content
            }
        }

        /**
         *
         * @param {null | Node | HTMLCollection | Node[] | Document & {generatedByIdiomorph:boolean}} newContent
         * @returns {Element}
         */
        function normalizeContent(newContent) {
            if (newContent == null) {
                // noinspection UnnecessaryLocalVariableJS
                const dummyParent = document.createElement('div');
                return dummyParent;
            } else if (generatedByIdiomorph.has(/** @type {Element} */ (newContent))) {
                // the template tag created by idiomorph parsing can serve as a dummy parent
                return /** @type {Element} */ (newContent);
            } else if (newContent instanceof Node) {
                // a single node is added as a child to a dummy parent
                const dummyParent = document.createElement('div');
                dummyParent.append(newContent);
                return dummyParent;
            } else {
                // all nodes in the array or HTMLElement collection are consolidated under
                // a single dummy parent element
                const dummyParent = document.createElement('div');
                for (const elt of [...newContent]) {
                    dummyParent.append(elt);
                }
                return dummyParent;
            }
        }

        /**
         *
         * @param {Node | null} previousSibling
         * @param {Node} morphedNode
         * @param {Node | null} nextSibling
         * @returns {Node[]}
         */
        function insertSiblings(previousSibling, morphedNode, nextSibling) {
            /**
             * @type {Node[]}
             */
            let stack = []
            /**
             * @type {Node[]}
             */
            let added = []
            while (previousSibling != null) {
                stack.push(previousSibling);
                previousSibling = previousSibling.previousSibling;
            }
            // Base the loop on the node variable, so that you do not need runtime checks for
            // undefined value inside the loop
            let node = stack.pop();
            while (node !== undefined) {
                added.push(node); // push added preceding siblings on in order and insert
                morphedNode.parentElement?.insertBefore(node, morphedNode);
                node = stack.pop();
            }
            added.push(morphedNode);
            while (nextSibling != null) {
                stack.push(nextSibling);
                added.push(nextSibling); // here we are going in order, so push on as we scan, rather than add
                nextSibling = nextSibling.nextSibling;
            }
            while (stack.length > 0) {
                const node = /** @type {Node} */ (stack.pop());
                morphedNode.parentElement?.insertBefore(node, morphedNode.nextSibling);
            }
            return added;
        }

        /**
         *
         * @param {Element} newContent
         * @param {Element} oldNode
         * @param {MorphContext} ctx
         * @returns {Node | null}
         */
        function findBestNodeMatch(newContent, oldNode, ctx) {
            /**
             * @type {Node | null}
             */
            let currentElement;
            currentElement = newContent.firstChild;
            /**
             * @type {Node | null}
             */
            let bestElement = currentElement;
            let score = 0;
            while (currentElement) {
                let newScore = scoreElement(currentElement, oldNode, ctx);
                if (newScore > score) {
                    bestElement = currentElement;
                    score = newScore;
                }
                currentElement = currentElement.nextSibling;
            }
            return bestElement;
        }

        /**
         *
         * @param {Node | null} node1
         * @param {Element} node2
         * @param {MorphContext} ctx
         * @returns {number}
         */
        // TODO: The function handles node1 and node2 as if they are Elements but the function is
        //   called in places where node1 and node2 may be just Nodes, not Elements
        function scoreElement(node1, node2, ctx) {
            if (isSoftMatch(node1, node2)) {
                // ok to cast: isSoftMatch performs a null check
                return .5 + getIdIntersectionCount(ctx, /** @type {Node} */ (node1), node2);
            }
            return 0;
        }

        /**
         *
         * @param {Node} tempNode
         * @param {MorphContext} ctx
         */
        // TODO: The function handles tempNode as if it's Element but the function is called in
        //   places where tempNode may be just a Node, not an Element
        function removeNode(tempNode, ctx) {
            removeIdsFromConsideration(ctx, tempNode)
            if (ctx.callbacks.beforeNodeRemoved(tempNode) === false) return;

            tempNode.parentNode?.removeChild(tempNode);
            ctx.callbacks.afterNodeRemoved(tempNode);
        }

        //=============================================================================
        // ID Set Functions
        //=============================================================================

        /**
         *
         * @param {MorphContext} ctx
         * @param {string} id
         * @returns {boolean}
         */
        function isIdInConsideration(ctx, id) {
            return !ctx.deadIds.has(id);
        }

        /**
         *
         * @param {MorphContext} ctx
         * @param {string} id
         * @param {Node} targetNode
         * @returns {boolean}
         */
        function idIsWithinNode(ctx, id, targetNode) {
            let idSet = ctx.idMap.get(targetNode) || EMPTY_SET;
            return idSet.has(id);
        }

        /**
         *
         * @param {MorphContext} ctx
         * @param {Node} node
         * @returns {void}
         */
        function removeIdsFromConsideration(ctx, node) {
            let idSet = ctx.idMap.get(node) || EMPTY_SET;
            for (const id of idSet) {
                ctx.deadIds.add(id);
            }
        }

        /**
         *
         * @param {MorphContext} ctx
         * @param {Node} node1
         * @param {Node} node2
         * @returns {number}
         */
        function getIdIntersectionCount(ctx, node1, node2) {
            let sourceSet = ctx.idMap.get(node1) || EMPTY_SET;
            let matchCount = 0;
            for (const id of sourceSet) {
                // a potential match is an id in the source and potentialIdsSet, but
                // that has not already been merged into the DOM
                if (isIdInConsideration(ctx, id) && idIsWithinNode(ctx, id, node2)) {
                    ++matchCount;
                }
            }
            return matchCount;
        }

        /**
         * A bottom up algorithm that finds all elements with ids inside of the node
         * argument and populates id sets for those nodes and all their parents, generating
         * a set of ids contained within all nodes for the entire hierarchy in the DOM
         *
         * @param {Element} node
         * @param {Map<Node, Set<string>>} idMap
         */
        function populateIdMapForNode(node, idMap) {
            let nodeParent = node.parentElement;
            // find all elements with an id property
            let idElements = node.querySelectorAll('[id]');
            for (const elt of idElements) {
                /**
                 * @type {Element|null}
                 */
                let current = elt;
                // walk up the parent hierarchy of that element, adding the id
                // of element to the parent's id set
                while (current !== nodeParent && current != null) {
                    let idSet = idMap.get(current);
                    // if the id set doesn't exist, create it and insert it in the  map
                    if (idSet == null) {
                        idSet = new Set();
                        idMap.set(current, idSet);
                    }
                    idSet.add(elt.id);
                    current = current.parentElement;
                }
            }
        }

        /**
         * This function computes a map of nodes to all ids contained within that node (inclusive of the
         * node).  This map can be used to ask if two nodes have intersecting sets of ids, which allows
         * for a looser definition of "matching" than tradition id matching, and allows child nodes
         * to contribute to a parent nodes matching.
         *
         * @param {Element} oldContent  the old content that will be morphed
         * @param {Element} newContent  the new content to morph to
         * @returns {Map<Node, Set<string>>} a map of nodes to id sets for the
         */
        function createIdMap(oldContent, newContent) {
            /**
             *
             * @type {Map<Node, Set<string>>}
             */
            let idMap = new Map();
            populateIdMapForNode(oldContent, idMap);
            populateIdMapForNode(newContent, idMap);
            return idMap;
        }

        //=============================================================================
        // This is what ends up becoming the Idiomorph global object
        //=============================================================================
        return {
            morph,
            defaults
        }
    })();
  </script>

Script Preparation code:

const startEl = document.getElementById("start")
const startElHTML = startEl.innerHTML
const endEl = document.getElementById("end")

Tests:

Original
startEl.innerHTML = startElHTML window.Idiomorph.original.morph(startEl, endEl)
With attribute existence check
startEl.innerHTML = startElHTML window.Idiomorph.morph(startEl, endEl)

Run results for: Attribute existence check within NamedNodeMap

Comparing perf of iterating through a NamedNodeMap in syncNodeFrom vs an Array created from said map. In this variant, we only create the array for the element being modified.

Original

With attribute existence check