get classname javascript code example

Example 1: javascript get class name

document.getElementById("myDIV").className = "mystyle";

Example 2: get name of class javascript

myObj.constructor.name

Example 3: element.classname javascript

let el = document.getElementById('item');

if (el.className === 'active'){
  el.className = 'inactive';
} else {
  el.className = 'active';
}