Run results for: className vs setAttribute vs classList

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 13421.53.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.77 Safari/537.36

Browser: Chrome 86

Operating system: Chrome OS 13421.53.0

Device Platform: Desktop

Date tested: 3 years ago

HTML Preparation code:

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

Script Preparation code:

var element = document.getElementById('foo');

Tests:

className
var i = 1000; while (i--) { element.className = "bar"; }
setAttribute
var i = 1000; while (i--) { element.setAttribute("class", "bar"); }
classList
var i = 1000; while (i--) { element.classList.add("bar"); }