Run results for: Javascript classList.contains vs element.matches vs classList.some

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0

Browser: Firefox 35

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

matches

5.7M/s

classList some

5.6M/s

classList

2.3M/s

View exact numbers

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; } }