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Run results for:
classList.contains vs. loop vs regex
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=503870" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0
Browser:
Firefox 115
Operating system:
Windows 8
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Use hasClass shorthand
475841.9 Ops/sec
Use classList
134241824.0 Ops/sec
Use classname match
370742.6 Ops/sec
HTML Preparation code:
<div id="foo" class="bar baz"></div>
Script Preparation code:
var test_element = document.getElementById("foo");
Tests:
Use hasClass shorthand
function hasClass(element, classes) { classes = classes.split(' '); for (var i = 0; i < classes.length; i++) { if (!element.classList.contains(classes[i])) { return false; } } return true; }; hasClass(test_element, "bar baz");
Use classList
test_element.classList.contains("bar"); test_element.classList.contains("baz");
Use classname match
test_element.className.match('bar'); test_element.className.match('baz');