Run results for: className vs. getAttribute vs. classList

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0

Browser: Firefox 89

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

HTML Preparation code:

<div id="foo" class="c1 c2 c3"></div>

Tests:

className
var element = document.getElementById("foo"); var i = 500; while (i--) { var z = element.className.split(/\s+/); var x = []; for (j = 0; j < z.length; j++) { x.push(z[j]); } }
setAttribute
var element = document.getElementById("foo"); var i = 500; while (i--) { var z = element.getAttribute('class').split(/\s+/); var x = []; for (j = 0; j < z.length; j++) { x.push(z[j]); } }
classList
var element = document.getElementById("foo"); var i = 500; while (i--) { var x = []; for (j = 0; j < element.classList.length; j++) { x.push(element.classList[j]); } }