Run results for: classList.contains vs. hasAttribute

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Use hasAttribute shorthand

69.0M/s

Use classList

36.9M/s

View exact numbers

Test name	Executions per second
✓ Use hasAttribute shorthand	69,020,768 Ops/sec
Use classList	36,945,008 Ops/sec

HTML Preparation code:

<div id="foo" class="bar baz"></div>

Script Preparation code:

var test_element = document.getElementById("foo");

Tests: