how to get class name of element in javascript code example

Example 1: how to get element by class name javascript

document.getElementsByClassName("legend").style.display="none";

Example 2: javascript get class name

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

Example 3: get name of class javascript

myObj.constructor.name

Example 4: how get class name

String className = this.getClass().getSimpleName();