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Run results for:
setAttribute(...) vs. classList.add(...) vs classList.value vs className
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<iframe src="https://measurethat.net/Embed?id=587220" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0
Browser:
Firefox 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
setAttribute(...)
29628.1 Ops/sec
classList.add(...)
18059.2 Ops/sec
classList.value
40948.1 Ops/sec
ClassName
84240.9 Ops/sec
HTML Preparation code:
<div id="foo"></div>
Tests:
setAttribute(...)
var element = document.getElementById("foo"); var i = 100; while (i--) { element.setAttribute("class", "bar"); }
classList.add(...)
var element = document.getElementById("foo"); var i = 100; while (i--) { element.classList.add("bar"); }
classList.value
var element = document.getElementById("foo"); var i = 100; while (i--) { element.classList.value = "bar"; }
ClassName
var element = document.getElementById("foo"); var i = 100; while (i--) { element.className = "bar"; }