Run results for: getElementById vs querySelector vs attribute

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 13421.99.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36

Browser: Chrome 86

Operating system: Chrome OS 13421.99.0

Device Platform: Desktop

Date tested: 4 years ago

HTML Preparation code:

<div id="testElement" jsname="testElement"></div>

Tests:

getElementById
var el = document.getElementById('testElement'); var className = el.className;
querySelector
var el = document.querySelector('#testElement'); var className = el.className;
querySelector jsname
var el = document.querySelector('[jsname="testElement"]'); var className = el.className;