Javascript DOM HTML Element classList Property add multiple classes

Introduction

Add multiple classes to a <div> element:

Click the button to add multiple classes to DIV.

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<!DOCTYPE html>
<html>
<head>
<style>
.mystyle {/*from  w  ww .j a v  a2s. c  o  m*/
  width: 500px;
  height: 50px;
  padding: 15px;
  border: 1px solid black;
}

.anotherClass {
  background-color: coral;
  color: white;
}

.thirdClass {
  text-transform: uppercase;
  text-align: center;
  font-size: 25px;
}
</style>
</head>
<body>
<button onclick="myFunction()">Test</button>


<div id="myDIV">
I am a DIV element
</div>

<script>
function myFunction() {
  document.getElementById("myDIV").classList.add("mystyle", "anotherClass", "thirdClass");
}
</script>

</body>
</html>



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