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Run results for:
className.replace vs classList.replace vs classList.remove/add
Based on the test (className vs. setAttribute vs. classList - measurethat.net/Benchmarks/Show/3108)
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=598940" 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/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
className replace
1.0M/s
classList replace
780K/s
classList remove add
767K/s
View exact numbers
Test name
Executions per second
✓
className replace
1,046,622 Ops/sec
classList replace
779,596 Ops/sec
classList remove add
767,145 Ops/sec
HTML Preparation code:
<div id="foo" class="asd4as sd33kf asdjbn qS4ves kjsdfd foo k3kjjf u33hh8 kkj28j nb23mb sdd2ON"></div>
Script Preparation code:
var foo = document.getElementById('foo');
Tests:
className replace
foo.className = foo.className.replace(/(?<=\s|^)foo(?=\s|$)/,'bar'); foo.className = foo.className.replace(/(?<=\s|^)bar(?=\s|$)/,'foo');
classList replace
foo.classList.replace('foo','bar'); foo.classList.replace('bar','foo');
classList remove add
foo.classList.remove('foo'); foo.classList.add('foo');