Run results for: setAttribute(...) vs. classList.add(...) vs classList.value vs className

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser: Chrome 139

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 9 months ago

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"; }