Run results for: id vs class vs dataset

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser: Chrome 144

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 months ago

HTML Preparation code:

<div id="helloid" class="hello-class" data-element="hello">hello</div>

Tests:

getElementById
var el = document.getElementById("helloid") var className = el.className;
getElementsByClassName
var el = document.getElementsByClassName("hello-class") var className = el.className;
querySelector(ID)
var el = document.querySelector("#helloid") var className = el.className;
querySelector(class)
var el = document.querySelector(".hello-class") var className = el.className;
querySelectorAll(ID)
var el = document.querySelectorAll("#helloid") var className = el[0].className;
querySelectorAll(class)
var el = document.querySelectorAll(".hello-class") var className = el[0].className;
querySelector(data-set)
var el = document.querySelector('[data-element="hello"]') var className = el.dataset.element;
querySelectorAll(data-set)
var el = document.querySelectorAll('[data-element="hello"]') var className = el[0].dataset.element;