Run results for: className vs. classList v2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36

Browser: Chrome 76

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
className	1313.9 Ops/sec
classList	913.1 Ops/sec

HTML Preparation code:

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

Tests:

className
var element = document.getElementById("foo"); var i = 1000; while (i--) { if (element.className.indexOf("test") > -1) { element.className = "bar"; } else { element.className = "test"; } }
classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { if (element.classList.contains("test")) { element.classList.add("bar"); } else { element.classList.add("test"); } }