get attribute function javascript code example

Example 1: javascript get attribute

//HTML
//<div id="elem" data-id="4hJ3s"></div>

var elem = document.getElementById("elem");
elem.getAttribute("data-id"); // "4hJ3s"

Example 2: js get element by attribute

//find all elements with "someAttr" attribute
document.querySelectorAll('[someAttr]')