jQuery AddClass 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() Method</title>
		<style>
			body {
				font-family: Arial, sans-serif;
				padding: 40px;
				background-color: #f9f9f9;
			}
			h1 {
				color: #333;
			}
			p {
				font-size: 16px;
				color: #444;
			}
			.content-box {
				padding: 20px;
				background-color: #fff;
				border: 1px solid #ccc;
				border-radius: 6px;
				margin-top: 20px;
				box-shadow: 0 2px 5px rgba(0,0,0,0.05);
			}
			.box {
				padding: 15px;
				background-color: #E3F2FD;
				border: 2px dashed #2196F3;
				border-radius: 6px;
				color: #0D47A1;
				margin-bottom: 15px;
				transition: background-color 0.3s, border-color 0.3s;
			}
			.highlighted {
				background-color: #FFF9C4 !important;
				border-color: #FFEB3B !important;
				color: #F57F17 !important;
			}
			button {
				margin-top: 15px;
				padding: 10px 20px;
				background-color: #2196F3;
				color: white;
				font-size: 14px;
				border: none;
				border-radius: 4px;
				cursor: pointer;
			}
			button:hover {
				background-color: #1976D2;
			}
		</style>
		<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
	</head>
	<body>

<h1>jQuery <code>addClass()</code> Method</h1>
		<p>
			The <code>addClass()</code> method adds one or more class names to the selected elements. In this example, clicking the button will add the <code>highlighted</code> class to the box below, changing its style.
		</p>

<div class="content-box">
			<div class="box" id="myBox">
				I will be highlighted when you click the button.
			</div>
			<button id="addClassBtn">Add Highlight</button>
		</div>

</body>
</html>

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