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Run results for:
className vs. classList
Fork from https://measurethat.net/Benchmarks/Show/54/0/classname-vs-setattribute-vs-classlist
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<iframe src="https://measurethat.net/Embed?id=628086" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/147.0.0.0
Browser:
Chrome 147
Operating system:
Windows
Device Platform:
Desktop
Date tested:
3 months ago
classList
1K/s
className +=
1K/s
className =
1K/s
View exact numbers
Test name
Executions per second
✓
classList
1,344 Ops/sec
className +=
1,324 Ops/sec
className =
1,283 Ops/sec
HTML Preparation code:
<div id="foo"></div>
Tests:
className =
var element = document.getElementById('foo'); var i = 1000; while (i--) { element.className = 'bar'; element.className = ''; }
className +=
var element = document.getElementById('foo'); var i = 1000; while (i--) { element.className += ' bar'; element.className = ''; }
classList
var element = document.getElementById('foo'); var i = 1000; while (i--) { element.classList.add('bar'); element.className = ''; }