MeasureThat.net

Run results for: className.indexOf vs. classList.contains 3

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0
Firefox 88
Windows
Desktop
3 years ago
Test name Executions per second
className 2980.0 Ops/sec
classList 269400.5 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="foo" class="test"></div>
Tests:

  • className

     
    var element = document.getElementById("foo");
    var i = 1000;
    while (i--) {
        (( ' ' + element.className + ' ').indexOf("test") > -1)
    }

  • classList

     
    var element = document.getElementById("foo");
    var i = 1000;
    while (i--) {
        element.classList.contains("test");
    }