Run results for: className vs. setAttribute vs. classList - exclusive

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: 3 months ago

HTML Preparation code:

<div id="foo"></div>

Tests:

className
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.className = `bar-${i}`; }
setAttribute
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.setAttribute("class", `bar-${i}`); }
classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.classList.add(`bar-${i}`); }
classList remove & add
var element = document.getElementById("foo"); var i = 999; element.classList.add(`bar-1000`); while (i--) { element.classList.remove(`bar-${i+1}`); element.classList.add(`bar-${i}`); }