jQuery AddClass Multiple Elements Example

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<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
		<title>jQuery addClass() to Multiple Elements</title>
		<style>
			body {
				font-family: Arial, sans-serif;
				padding: 40px;
				background-color: #f5f5f5;
			}
			h1 {
				color: #333;
			}
			.box1,
			.box2, 
			.box3{
				width: 100px;
				height: 100px;
				background-color: #ccc;
				margin: 10px;
				display: inline-block;
				border-radius: 4px;
				transition: all 0.3s ease;
			}
			.highlight {
				background-color: #FF9800;
				box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
				transform: scale(1.1);
			}
			button {
				margin-top: 20px;
				padding: 10px 20px;
				background-color: #FF9800;
				color: #fff;
				border: none;
				border-radius: 4px;
				cursor: pointer;
			}
			button:hover {
				background-color: #FB8C00;
			}
		</style>
		<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
	</head>
	<body>

<h1>Apply Class to Multiple Elements</h1>

<br/>
		<button id="highlightAll">Highlight All Boxes</button>

</body>
</html>

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