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The class name can also be used by JavaScript to perform certain tasks for specific elements.
JavaScript can access elements with a specific class name with the getElementsByClassName() method:
<!DOCTYPE html>
<html>
<head>
<title>class in JavaScript</title>
<style>
.school {background-color: tomato;color: white;padding: 10px;}
</style>
</head>
<body>
<h2>Use of The class Attribute in JavaScript</h2>
<p>Click the button to hide all elements with class name "school":</p>
<button onclick="myFunction()">Hide elements</button>
<h2 class="school">GSSS KHOKHAR</h2>
<p>GOVT.SEN.SEC.SCHOOL, KHOKHAR</p>
<h2 class="school">GHS, HARAZ</h2>
<p>GOVT. HIGH SCHOOL, HARAZ</p>
<h2 class="school">GSSS SARAINAGA</h2>
<p>GOVT.SEN.SEC.SCHOOL, SARAINAGA</p>
<script>
function myFunction() {
var x = document.getElementsByClassName("school");
for (var i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
}
</script>
</body>
</html>
