Run results for: test123v6

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

HTML Preparation code:

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

Tests:

className
var element = document.getElementById("foo"); var i = 1000; while(i > 0) { element.className += " bar bar2 bar3"; i--; element.className = "demo" }
setAttribute
var element = document.getElementById("foo"); var i = 1000; while(i > 0) { element.setAttribute("class", "demo bar bar2 bar3"); i--; element.className = "demo" }
classList
var element = document.getElementById("foo"); var i = 1000; while(i > 0) { element.classList.add(["bar", "bar2", "bar3"]); i--; element.className = "demo" }