Run results for: Testing getElementById vs getElementsByClassName vs querySelector vs querySelectorAll plus change classname

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0

Browser: Firefox 92

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

HTML Preparation code:

<div class="test" id="testing"></div>

Tests:

getElementById
el = document.getElementById("testing") el.classList.add('XXXXXXXX')
getElementsByClassName
el = [...document.getElementsByClassName("test")] el[0].classList.add('XXXXXXXX')
querySelector
el = document.querySelector(".test") el.classList.add('XXXXXXXX')
querySelectorAll
el = document.querySelectorAll(".test") el[0].classList.add('XXXXXXXX')