<!DOCTYPE html>
<html lang="id">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-widtfh, initial-scale=1, shrink-to-fit=no">
<title>Bootstrap 4 Headings</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
<style>
    .bs-example{
    	margin: 20px;
    }
</style>
</head>
<body>
<div class="bs-example">
    <h1>h1. Bootstrap heading</h1>
    <h2>h2. Bootstrap heading</h2>
    <h3>h3. Bootstrap heading</h3>
    <h4>h4. Bootstrap heading</h4>
    <h5>h5. Bootstrap heading</h5>
    <h6>h6. Bootstrap heading</h6>
</div>
</body>
</html>

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.