CodePen Embed - HTML External JavaScript File

<!DOCTYPE html>
<html>
<head>
    <title>External Javascript Example</title>
    <script src="script.js"></script>
</head>
<body>

    <h1>External JavaScript Example</h1>

</body>
</html>

// alert('Hello, world!');

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External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.