Run results for: DEX vs JQUERY ::: Event Delegation

Run details:
User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36
Browser: Chrome 61
Operating system: Mac OS X 10.12.5
Device Platform: Other
Date tested: 6 years ago
Test name	Executions per second
Dex ::: onClick()	76.4 Ops/sec
jQuery ::: on()	49.1 Ops/sec
HTML Preparation code:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<script>
	(function(exposeAs){
        var Dex = function(selector, nodes){

            // Return Dex object
            return new Dex.fn.init(selector, nodes);

        };

        Dex.fn = Dex.prototype = {
            init: function(selector, nodes){
                this.selector = selector;

                if(nodes){
                    this.nodes = nodes;
                } else {
                    this.nodes = document.querySelectorAll(selector);
                }

                return this;
            }


        };

        // CONSTANTS
        var UNDEFINED = "undefined";

        // HIDDEN VARIABLES
        var cachedSelections = {},
            delegatedEventListeners = {},
            mutationObservers = {},
            DOMMutationCallback = function(mutations, selector, parentNodes){
                var n, x, y,
                    mutationRecord,
                    addedNode,
                    removedNode,
                    modifiedNodeAttribute,
                    callbacks,
                    modifiedSelector,
                    _target,
                    executeCallbacks = function(queue, node, arg1, arg2){
                        var n = 0;

                        while(queue[n]){
                            // Call callback function
                            queue[n].callback.call(node, arg1, arg2);

                            if(!queue[n].persistant){
                                queue.splice(n, 1);
                            }

                            n++;

                        }
                    },
                    executeAttributecallbacks = function(queue, node, attrKey, attrValue){
                        y = 0;

                        while(queue[y]){
                            // Call callback function
                            if(queue[y].attrKey == attrKey){
                                queue[y].callback.call(node, attrKey, attrValue);

                                if(!queue[y].persistant){
                                    queue.splice(y, 1);

                                }

                            }

                            y++;
                        }
                    };


                // Loop through mutation records
                for(n = 0; n < mutations.length; n++){
                    mutationRecord = mutations[n];

                    // Loop through added nodes
                    if(mutationRecord.addedNodes.length > 0){
                        callbacks = mutationObservers[selector].callbacks.onOpen;

                        if(callbacks){
                            for(x = 0; x < mutationRecord.addedNodes.length; x++){
                                addedNode = mutationRecord.addedNodes[x];

                                // Check if node type is valid
                                if(addedNode.nodeType == 1){

                                    // Loop through callbacks
                                    for(_target in callbacks){
                                        modifiedSelector = callbacks[_target].matchType.modifiedSelector;

                                        // See if addedNode matches the _target of the callback
                                        switch(callbacks[_target].matchType.type){
                                            case "tag":
                                                if(addedNode.tagName.toUpperCase() == modifiedSelector){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, addedNode);

                                                }
                                                break;
                                            case "id":
                                                if(addedNode.id == modifiedSelector){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, addedNode);

                                                }
                                                break;
                                            case "classname":
                                                if(addedNode.classList.contains(modifiedSelector)){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, addedNode, mutationRecord.addedNodes);

                                                }
                                                break;
                                            case "complex":
                                                if(addedNode.matches(modifiedSelector)){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, addedNode);

                                                }
                                                break;

                                        }

                                    }
                                }

                            }
                        }
                    }

                    if(mutationRecord.removedNodes.length > 0){
                        callbacks = mutationObservers[selector].callbacks.onClose;

                        if(callbacks){
                            // Loop through removed nodes
                            for(x = 0; x < mutationRecord.removedNodes.length; x++){
                                removedNode = mutationRecord.removedNodes[x];

                                // Check if node type is valid
                                if(removedNode.nodeType == 1){

                                    // Loop through callbacks
                                    for(_target in callbacks){

                                        modifiedSelector = callbacks[_target].matchType.modifiedSelector;

                                        // See if removedNode matches the _target of the callback
                                        switch(callbacks[_target].matchType.type){
                                            case "tag":
                                                if(removedNode.tagName.toUpperCase() == modifiedSelector){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, removedNode);

                                                }
                                                break;
                                            case "id":
                                                if(removedNode.id == modifiedSelector){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, removedNode);

                                                }
                                                break;
                                            case "classname":
                                                if(removedNode.classList.contains(modifiedSelector)){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, removedNode);

                                                }
                                                break;
                                            case "complex":
                                                if(removedNode.matches(modifiedSelector)){
                                                    // Loop through all callbacks
                                                    executeCallbacks(callbacks[_target].queue, removedNode);

                                                }
                                                break;

                                        }

                                    }

                                }

                            }
                        }
                    }

                    if(mutationRecord.attributeName){
                        callbacks = mutationObservers[selector].callbacks.onAttribute;

                        if(callbacks){
                            // Loop through modified attributes
                            modifiedNodeAttribute = mutationRecord.target;

                            // Loop through callbacks
                            for(_target in callbacks){
                                modifiedSelector = callbacks[_target].matchType.modifiedSelector;

                                // See if modifiedNodeAttribute matches the _target of the callback
                                switch(callbacks[_target].matchType.type){
                                    case "tag":
                                        if(modifiedNodeAttribute.tagName.toUpperCase() == modifiedSelector){
                                            // Loop through all callbacks
                                            if(mutationRecord.target.attributes[mutationRecord.attributeName]){ // Its a live list, so check it hasnt been removed
                                                executeAttributecallbacks(callbacks[_target].queue, modifiedNodeAttribute, mutationRecord.attributeName, mutationRecord.target.attributes[mutationRecord.attributeName].value);

                                            }

                                        }
                                        break;
                                    case "id":
                                        if(modifiedNodeAttribute.id == modifiedSelector){
                                            // Loop through all callbacks
                                            if(mutationRecord.target.attributes[mutationRecord.attributeName]){ // Its a live list, so check it hasnt been removed
                                                executeAttributecallbacks(callbacks[_target].queue, modifiedNodeAttribute, mutationRecord.attributeName, mutationRecord.target.attributes[mutationRecord.attributeName].value);

                                            }
                                        }
                                        break;
                                    case "classname":
                                        if(modifiedNodeAttribute.classList.contains(modifiedSelector)){
                                            // Loop through all callbacks
                                            if(mutationRecord.target.attributes[mutationRecord.attributeName]){ // Its a live list, so check it hasnt been removed
                                                executeAttributecallbacks(callbacks[_target].queue, modifiedNodeAttribute, mutationRecord.attributeName, mutationRecord.target.attributes[mutationRecord.attributeName].value);

                                            }
                                        }
                                        break;
                                    case "complex":
                                        if(modifiedNodeAttribute.matches(modifiedSelector)){
                                            // Loop through all callbacks
                                            if(mutationRecord.target.attributes[mutationRecord.attributeName]){ // Its a live list, so check it hasnt been removed
                                                executeAttributecallbacks(callbacks[_target].queue, modifiedNodeAttribute, mutationRecord.attributeName, mutationRecord.target.attributes[mutationRecord.attributeName].value);

                                            }
                                        }
                                        break;
                                }

                            }
                        }
                    }

                }

            },
            createEventListener = function(dexObject, eventType, selector, target, callback, persistant){
                // Check that the event type exists in queue
                if(!delegatedEventListeners[eventType]){
                    delegatedEventListeners[eventType] = {};
                }

                // Check that this selector is registered
                if(!delegatedEventListeners[eventType][selector]){
                    delegatedEventListeners[eventType][selector] = {};

                    // Setup listener

                    attachEventListeners(eventType, dexObject);
                }

                // Check that this target is registered
                if(!delegatedEventListeners[eventType][selector][target]){
                    delegatedEventListeners[eventType][selector][target] = [];
                }

                // register delegated event listener
                delegatedEventListeners[eventType][selector][target].push({
                    callback: callback,
                    persistant: persistant
                });


            },
            attachEventListeners = function(eventType, dexObject){

                var n,
                    selector = {
                        string: dexObject.selector
                    };

                for(n = 0; n < dexObject.nodes.length; n++){
                    selector.node = dexObject.nodes[n];

                    selector.node.addEventListener(eventType, function(e){
                        var eventHandlers = delegatedEventListeners[eventType][selector.string];

                        for(handlerSelector in eventHandlers){

                            clickedNode = e.target;


                            while(	clickedNode &&
                                    clickedNode !== document &&
                                    clickedNode !== selector.node) { // Stop looking when we hit the node that contains the event listener

                                if (clickedNode.matches(handlerSelector)) {

                                    var handlerIndex = 0;

                                    while (eventHandlers[handlerSelector][handlerIndex]){
                                        eventHandlers[handlerSelector][handlerIndex].callback.call(clickedNode, e);

                                        if(!eventHandlers[handlerSelector][handlerIndex].persistant){
                                            eventHandlers[handlerSelector].splice(handlerIndex, 1);
                                        }

                                        handlerIndex++;
                                    }

                                }

                                clickedNode = clickedNode.parentNode;

                            }
                        }

                    });
                }


            };

        // EXPOSED SELECTOR FUNCTIONS
        Dex.fn.init.prototype = {

            first: function(){
                /* Remove all nodes except first from node list */

                this.nodes = [this.nodes[0]];

                return this;
            },

            index: function(index){
                /* Remove all nodes except requested index */

                this.nodes = [this.nodes[index]];

                return this;
            },

            getNode: function(index){
                /* Return DOM node */

                return this.nodes[index];
            },

            exists: function(){
                /* See if the node list contains at least one node */

                return this.nodes[0] != null;
            },

            appendClone: function(node){

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].appendChild(node.cloneNode(true));
                }

                return this;

            },

            append: function(node){

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].appendChild(node);
                }

                return this;

            },

            remove: function(){

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n];

                    if (this.nodes[n].parentNode) {
                        this.nodes[n].parentNode.removeChild(this.nodes[n]);
                    }
                }

                return this;

            },

            clone: function(){
                var n,
                    clonedNodes = [];

                for(n = 0; n < this.nodes.length; n++){
                    clonedNodes.push(this.nodes[n].cloneNode(true));
                }

                this.nodes = clonedNodes;

                return this;
            },

            parent: function(){

                this.nodes = [this.nodes[0].parentNode];

                return this;

            },

            closest: function(matchSelector){

                var closest = [];

                node = this.nodes[0];

                // Go through parents
                while(node && node !== document) {
                    if (node.matches(matchSelector)) {

                        closest = [node];
                        break;

                    }

                    node = node.parentNode;

                }

                this.nodes = closest;

                return this;

            },

            filter: function(selector){
                /* Filter then current node list - note: only filters on the first node in list */

                this.nodes = this.nodes[0].querySelectorAll(selector);

                return this;

            },

            // DOM modification
            setHTML: function(value){
                /* Set innerHTML of all nodes in nodelist */

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].innerHTML = value;
                }

                return this;
            },

            getHTML: function(value){
                /* Get innerHTML of all first node in nodelist */

                return this.nodes[0].innerHTML;
            },

            css: function(styles){
                /* Set CSS of all nodes in nodelist */

                var style,
                    n;

                for(n = 0; n < this.nodes.length; n++){

                    for(style in styles){

                        this.nodes[n].style[style] = styles[style];

                    }

                }

                return this;



            },

            setAttribute: function(key, value){
                /* Set attribute of all nodes in nodelist */

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].setAttribute(key, value);
                }

                return this;
            },

            getAttribute: function(key){
                /* Get attribute of first node in nodelist */

                return this.nodes[0].getAttribute(key);
            },

            toggleAttribute: function(key, value){
                /* Get attribute of first node in nodelist */

                var n,
                    attrValue;

                for(n = 0; n < this.nodes.length; n++){
                    attrValue = this.nodes[n].getAttribute(key);

                    if(attrValue == value[0]){
                        this.nodes[n].setAttribute(key, value[1]);
                    } else {
                        this.nodes[n].setAttribute(key, value[0]);
                    }
                }

                return this;
            },

            cache: function(cacheID){
                /* Cache node list with cacheID as ID */

                cachedSelections[cacheID] = this;
            },

            // Classes
            addClass: function(classname){
                /* Add class to all nodes in nodelist */


                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].classList.add(classname);
                }

                return this;
            },

            removeClass: function(classname){
                /* Remove class from all nodes in nodelist */

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].classList.remove(classname);
                }
                return this;
            },

            hasClass: function(classname){
                /* Check whether first node in list contains a classname */

                var result = false;

                if(this.nodes[0]){
                    result = this.nodes[0].classList.contains(classname);
                }

                return result;

            },

            toggleClass: function(classname){
                /* Toggle classnames on all nodes in nodelist */

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].classList.toggle(classname);
                }

                return this;
            },

            replaceClass: function(old_classname, new_classname){
                /* Replace old_classname with new_classname on all nodes in nodelist */

                var n;

                for(n = 0; n < this.nodes.length; n++){
                    this.nodes[n].classList.replace(old_classname, new_classname);
                }

                return this;
            },

            trigger: function(eventType){
                /* Trigger eventType (click, mouseover, etc, ...) on all nodes in nodelist */

                if(this.nodes[0]){
                    var clickEvent = document.createEvent("MouseEvents");

                    clickEvent.initEvent(eventType, true, true);
                    this.nodes[0].dispatchEvent(clickEvent);
                }

                return this;
            },

            onOpen: function(target, callback){
                this.onMutation("onOpen", target, callback, {
                    children: false,
                    persistant: true
                });

                return this;
            },

            onceOpen: function(target, callback){
                this.onMutation("onOpen", target, callback, {
                    children: false,
                    persistant: false
                });

                return this;
            },

            onClose: function(target, callback){

                this.onMutation("onClose", target, callback, {
                    children: false,
                    persistant: true
                });

                return this;
            },

            onceClose: function(target, callback){

                this.onMutation("onClose", target, callback, {
                    children: false,
                    persistant: false
                });

                return this;
            },

            onAttribute: function(target, attrKey, callback){
                this.onMutation("onAttribute", target, callback, {
                    attrKey: attrKey,
                    persistant: true
                });

                return this;
            },

            onceAttribute: function(target, attrKey, callback){
                this.onMutation("onAttribute", target, callback, {
                    attrKey: attrKey,
                    persistant: false
                });

                return this;
            },

            onMutation: function(mutationType, target, callback, parameters){
                var selector = this.selector,
                    parentNodes = this.nodes,
                    matchType = function(target){
                        // This needs updating to cater for complex selectors.

                        var result;

                        if(target[0] == "."){
                            result = {
                                type: "classname",
                                modifiedSelector: target.slice(1)
                            }


                        } else if(target[0] == "#"){
                            result = {
                                type: "id",
                                modifiedSelector: target.slice(1)
                            }

                        } else if(target[0] == "["){
                            result = {
                                type: "complex",
                                modifiedSelector: target
                            }

                        } else {
                            result = {
                                type: "tag",
                                modifiedSelector: target.toUpperCase()
                            }
                        }

                        return result;

                    }(target),
                    n,
                    parameters = parameters || {};


                // See if we need to attach a mutation observer


                if(!mutationObservers[this.selector]){
                    mutationObservers[this.selector] = {
                        observer: new MutationObserver(function(mutations){
                            DOMMutationCallback(mutations, selector, parentNodes);
                        }),
                        callbacks: {}
                    }

                    // Attach observer to all matches nodes
                    for(n = 0; n < this.nodes.length; n++){
                        mutationObservers[this.selector].observer.observe(this.nodes[n], {
                            attributes: true,
                            childList: true,
                            characterData: false,
                            subtree: true
                        });
                    }
                }



                // See if there are already callbacks for mutationType
                if(!mutationObservers[this.selector].callbacks[mutationType]){
                    mutationObservers[this.selector].callbacks[mutationType] = {}
                }

                // See if there are already calbacks for this target
                if(!mutationObservers[this.selector].callbacks[mutationType][target]){
                    // mutationObservers[this.selector][childtree].callbacks[mutationType][target] = []
                    mutationObservers[this.selector].callbacks[mutationType][target] = {
                        matchType: matchType,
                        queue: []
                    }
                }

                // Save callback
                mutationObservers[this.selector].callbacks[mutationType][target].queue.push({
                    callback: callback,
                    attrKey: parameters.attrKey,
                    persistant: parameters.persistant
                });
            },


            onClick: function(target, callback){
                createEventListener(this, "click", this.selector, target, callback, true);

                return this;

            },

            oneClick: function(target, callback){
                createEventListener(this, "click", this.selector, target, callback, false);

                return this;

            },

            onMouseUp: function(target, callback){
                createEventListener(this, "mouseup", this.selector, target, callback, true);

                return this;

            },

            oneMouseUp: function(target, callback){
                createEventListener(this, "mouseup", this.selector, target, callback, false);

                return this;

            },

            onMouseDown: function(target, callback){
                createEventListener(this, "mousedown", this.selector, target, callback, true);

                return this;

            },

            oneMouseDown: function(target, callback){
                createEventListener(this, "mousedown", this.selector, target, callback, false);

                return this;

            },

            onMouseEnter: function(target, callback){
                createEventListener(this, "mouseenter", this.selector, target, callback, true);

                return this;

            },

            oneMouseEnter: function(target, callback){
                createEventListener(this, "mouseenter", this.selector, target, callback, false);

                return this;

            },

            onMouseLeave: function(target, callback){
                createEventListener(this, "mouseleave", this.selector, target, callback, true);

                return this;

            },

            oneMouseLeave: function(target, callback){
                createEventListener(this, "mouseleave", this.selector, target, callback, false);

                return this;

            },

            onMouseOver: function(target, callback){
                createEventListener(this, "mouseover", this.selector, target, callback, true);

                return this;

            },

            oneMouseOver: function(target, callback){
                createEventListener(this, "mouseover", this.selector, target, callback, false);

                return this;

            },

            onMouseOut: function(target, callback){
                createEventListener(this, "mouseout", this.selector, target, callback, true);

                return this;

            },

            oneMouseOut: function(target, callback){
                createEventListener(this, "mouseout", this.selector, target, callback, false);

                return this;

            },


        }

        Dex.appendCSS = function(url){
            var head = document.head,
                link = document.createElement('link');

              link.type = "text/css";
              link.rel = "stylesheet";
              link.href = url;

              head.appendChild(link);

              return link;
        }

        Dex.getCached = function(cacheID){
            return cachedSelections[cacheID];
        }

        Dex.clearCache = function(cacheID){
            delete cachedSelections[cacheID];

        }

        Dex.tag = function(tag){
            /* Use Tag() to select nodes using the getElementsByTagName */

            var nodes = document.getElementsByTagName(tag);

            return Dex(tag, nodes);

        }

        Dex.class = function(classname){
            /* Use Tag() to select nodes using the getElementsByClassName */

            var nodeCollection = document.getElementsByClassName(classname),
                nodes = Array.prototype.slice.call(nodeCollection);

            return Dex("." + classname, nodes);

        }

        Dex.iframe = function(selector){

            var iframe = document.querySelectorAll(selector)[0];

            return Dex.node(iframe.contentDocument || iframe.contentWindow.document);

        }

        Dex.id = function(id){
            /* Use Tag() to select nodes using the getElementById */

            var nodes = [document.getElementById(id)];

            return Dex("#" + id, nodes);

        }

        Dex.node = function(node){
            /* Use Node to create a Dex object with a DOM node directly */

            return Dex("node", [node]);

        }

        Dex.collection = function(nodeCollection){
            /* Use Node to create a Dex object with an HTML Node Collection  directly */

            var nodes = [];

            for(n = 0; n < nodeCollection.length; n++){
                nodes.push(nodeCollection[n]);
            }

            return Dex("node", nodes)
        }

        Dex.dump = function(object){
            console.log(mutationObservers);
        };

        if(exposeAs){
            window[exposeAs] = Dex;
        }

    })("DexV2");
</script>

<style>
		.add-colour {
			background: red;
		}
  		.add-more-colour {
			background: red;
		}
</style>

<section>
			<table>
				<tbody>
					<tr>
						<td>
							<div class="app-container">
								<table>
									<tbody>
										<tr>
											<td>
												<div class="app-window">
													App window
													<table>
														<tbody>
															<tr>
																<td>
																	<div class="app-menu" id="the-menu">
                                                                      	<h1 class="h1" id="h1" data-attr="hello there">Button</h1>
																		app menu
																		<div>
																			<div>
																				<ul>
																					<li class="add-more-colour">
																						<span class="title">This is a list item in an unordered list</span>
																					</li>
																					<li class="add-more-colour">
																						<button class="click-me-ul">ul .click-me</button>
																						<button class="and-me">ul .and-me</button>
																					</li>

																				</ul>

																				<ol>
																					<li class="add-more-colour">
																						<span class="title">This is a list item in an ordered list</span>
																					</li>
																					<li class="add-more-colour">
																						<button class="click-me-ol">ol .click-me</button>
																						<button class="and-me">ol .and-me</button>
																					</li>
																				</ol>
																			</div>
																			<span id="output">This is the output area</span>
																		</div>
																	</div>
																</td>
															</tr>
														</tbody>
													</table>
												</div>
											</td>
										</tr>
									</tbody>
								</table>
							</div>
						</td>
					</tr>
				</tbody>
			</table>
		</section>
Tests:
Dex ::: onClick()
DexV2.class("app-container") .onClick(".app-menu", function(){ // Handler }) .onClick(".click-me-ul", function(){ // Handler }) .onClick(".and-me", function(){ // Handler }); document.getElementsByClassName("app-menu")[0].click(); document.getElementsByClassName("click-me-ul")[0].click(); document.getElementsByClassName("and-me")[0].click(); document.getElementsByClassName("and-me")[1].click();
jQuery ::: on()
$(".app-container") .on("click", ".app-menu", function(){ // Handler }) .on("click", ".click-me-ul", function(){ // Handler }) .on("click", ".and-me", function(){ // Handler }); document.getElementsByClassName("app-menu")[0].click(); document.getElementsByClassName("click-me-ul")[0].click(); document.getElementsByClassName("and-me")[0].click(); document.getElementsByClassName("and-me")[1].click();
Run results for: DEX vs JQUERY ::: Event Delegation

Dex ::: onClick()

jQuery ::: on()
