- Internal JavaScript and External JavaScript are two ways to add JavaScript code to an HTML web page.
- Internal JavaScript is code that is included directly in the HTML document.
- This is typically done by including the JavaScript code between script tags in the head or body section of the HTML file.
<!DOCTYPE html>
<html>
<head>
<script>
// Internal JavaScript code here
</script>
</head>
<body>
<h1>Hello, world!</h1>
<script>
// More internal JavaScript code here
</script>
</body>
</html>
- Internal JavaScript is easy to include and can be useful for small code snippets, but it can make the HTML document larger and harder to read.
- Additionally, it can be difficult to reuse internal JavaScript code across multiple pages.
- External JavaScript is code that is stored in a separate file and referenced by the HTML document.
- This is typically done by using a script tag with the src attribute set to the URL of the external JavaScript file.
<!DOCTYPE html>
<html>
<head>
<script src="my-script.js"></script>
</head>
<body>
<h1>Hello, world!</h1>
<script src="other-script.js"></script>
</body>
</html>
- External JavaScript files can be reused across multiple pages, making it easier to maintain and update the code.
- They also allow for better separation of concerns between HTML and JavaScript, making the code easier to read and maintain.
- In summary, Internal JavaScript is included directly in the HTML document, while External JavaScript is stored in a separate file and referenced by the HTML document.
- Both have their advantages and disadvantages, and the choice between the two will depend on the specific requirements of the project.
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