Run results for: jQuery hasClass vs vanilla JS classList.contains

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Vanilla JS classList.contains

16.9M/s

jQuery hasClass

3.2M/s

View exact numbers

Test name	Executions per second
✓ Vanilla JS classList.contains	16,882,364 Ops/sec
jQuery hasClass	3,151,120 Ops/sec

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div id="el" class="test"></div>

Tests:

jQuery hasClass
$("#el").hasClass("test");
Vanilla JS classList.contains
document.getElementById("el").classList.contains("test");