Run results for: test123xxxxx

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

assign

7.8M/s

classList

1.6M/s

append

2K/s

View exact numbers

HTML Preparation code:

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

Tests:

append
var element = document.getElementById("foo"); element.className += " bar bar2 bar3";
assign
var element = document.getElementById("foo"); element.className = "bar bar2 bar3";
classList
var element = document.getElementById("foo"); element.classList.add("bar"); element.classList.add("bar2"); element.classList.add("bar3");