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Run results for:
Javascript classList.contains vs element.matches vs classList.some vs classList.every
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<iframe src="https://measurethat.net/Embed?id=586348" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0
Browser:
Firefox 115
Operating system:
Windows 8.1
Device Platform:
Desktop
Date tested:
one year ago
classList some
3.2M/s
matches
2.8M/s
classList
1.7M/s
classList every
1.6M/s
View exact numbers
Test name
Executions per second
✓
classList some
3,157,385 Ops/sec
matches
2,784,863 Ops/sec
classList
1,666,209 Ops/sec
classList every
1,559,680 Ops/sec
HTML Preparation code:
<body class="foo bar baz"></body>
Tests:
matches
var i = 1000; while (i--) { if (document.body.matches(".foo.baz")) { return true; } }
classList
var i = 1000; while (i--) { if (document.body.classList.contains('foo') && document.body.classList.contains('baz')) { return true; } }
classList some
var i = 1000; while (i--) { if (['foo', 'baz'].some(className => document.body.classList.contains(className))) { return true; } }
classList every
var i = 1000; while (i--) { if (['foo', 'baz'].every(className => document.body.classList.contains(className))) { return true; } }