Run results for: classList.contains vs. hasAttribute

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser: Chrome 71

Operating system: Windows 7

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Use hasAttribute shorthand	670048.6 Ops/sec
Use classList	722675.1 Ops/sec

HTML Preparation code:

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

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

Script Preparation code:

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

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

Tests:

Use hasAttribute shorthand
test_element.hasAttribute('class');
test_element.hasAttribute('class');
Use classList
test_element.classList.contains("bar");
test_element.classList.contains("bar");