if hass class code example

Example 1: javascript check if element has class

if(document.getElementById("myElmentID").classList.contains("hidden")){
// I have the 'hidden' class
}

Example 2: how to check has class name in js?

element.classList.contains(className);Code language: CSS (css)

Example 3: has class in jquery

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>hasClass demo</title>
  <style>
  p {
    margin: 8px;
    font-size: 16px;
  }
  .selected {
    color: red;
  }
  </style>
  <script src="https://code.jquery.com/jquery-3.5.0.js"></script>
</head>
<body>
 
<p>This paragraph is black and is the first paragraph.</p>
<p class="selected">This paragraph is red and is the second paragraph.</p>
<div id="result1">First paragraph has selected class: </div>
<div id="result2">Second paragraph has selected class: </div>
<div id="result3">At least one paragraph has selected class: </div>
 
<script>
$( "#result1" ).append( $( "p" ).first().hasClass( "selected" ).toString() );
$( "#result2" ).append( $( "p" ).last().hasClass( "selected" ).toString() );
$( "#result3" ).append( $( "p" ).hasClass( "selected" ).toString() ) ;
</script>
 
</body>
</html>