Run results for: hasAttribute vs. getAttribute vs. classList.contains

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

hasAttribute single

11.4M/s

getAttribute single

10.1M/s

hasAttribute

9.9M/s

getAttribute

9.9M/s

classList single

9.3M/s

classList

9.3M/s

View exact numbers

Test name	Executions per second
✓ hasAttribute single	11,405,572 Ops/sec
getAttribute single	10,120,661 Ops/sec
hasAttribute	9,935,744 Ops/sec
getAttribute	9,892,648 Ops/sec
classList single	9,276,473 Ops/sec
classList	9,256,814 Ops/sec

HTML Preparation code:

<div id="foo" class="foo bar buz ignore" style="display:block" width="500" height="600" title="TEST" is-ignore="true" ignore></div>
<div id="bar" ignore></div>
<div id="buz" is-ignore="true"></div>
<div id="foobar" class="foo ignore"></div>

Tests:

hasAttribute
var element = document.getElementById("foo"); var isIgnored = element.hasAttribute('ignore');
getAttribute
var element = document.getElementById("foo"); var isIgnored = element.getAttribute('is-ignore') === "true";
classList
var element = document.getElementById("foo"); var isIgnored = element.classList.contains('ignore');
hasAttribute single
var element = document.getElementById("bar"); var isIgnored = element.hasAttributes('ignore');
getAttribute single
var element = document.getElementById("buz"); var isIgnored = element.getAttribute('is-ignore') === "true";
classList single
var element = document.getElementById("foobar"); var isIgnored = element.classList.contains('ignore');