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Run results for: classList.contains VS className.includes 1000

?.x2 x1000

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36
Chrome 100
Mac OS X 10.13.6
Desktop
3 years ago
Test name Executions per second
className.includes 18555.1 Ops/sec
classList.contains 9230.2 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="foo" class="test"></div>
Tests:

  • className.includes

     
    let el = document.getElementById("foo"), i = 1000;
    while (i--) {
        el.className?.includes?.("test");
    }

  • classList.contains

     
    let el = document.getElementById("foo"), i = 1000;
    while (i--) {
        el.classList?.contains?.("test");
    }