Run results for: className vs. setAttribute vs. classList (static and dynamic classes)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 5 years ago

HTML Preparation code:

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

Tests:

className
var element = document.getElementById("foo"); element.className = "bar"; 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(i); element.classList.remove(i + 1); }