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/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

hasAttribute single

39.7M/s

getAttribute single

26.7M/s

hasAttribute

26.7M/s

getAttribute

25.8M/s

classList

24.7M/s

classList single

24.4M/s

View exact numbers

Test name	Executions per second
✓ hasAttribute single	39,698,800 Ops/sec
getAttribute single	26,688,386 Ops/sec
hasAttribute	26,669,682 Ops/sec
getAttribute	25,758,970 Ops/sec
classList	24,721,176 Ops/sec
classList single	24,388,794 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');