HTML and CSS Certification Practice Test 2025 – The All-in-One Guide to Master Your Certification!

Question: 1 / 400

How can you include an external JavaScript file in an HTML document?

By using the <script src="script.js"> tag before the closing </body> tag

Including an external JavaScript file in an HTML document is typically done using the `<script>` tag with the `src` attribute, which points to the location of the JavaScript file. Placing this tag before the closing `</body>` tag is a common practice. This approach has several advantages:

1. **Performance:** Placing scripts at the end of the body ensures that the HTML content loads first. This leads to a better user experience, as users can start interacting with the page while the JavaScript file is loading.

2. **Parsing Order:** When a browser encounters a `<script>` tag, it pauses HTML parsing until the script is downloaded and executed. By positioning the script at the end of the body, you minimize delays in the rendering of the page content because the browser will finish parsing the HTML structure before executing the script.

This method enhances the overall loading speed and responsiveness of the web page, making it an effective strategy for developers looking to optimize their sites.

Embedding a JavaScript file directly in the `<head>` section is indeed possible, but it can block the rendering of the page until the script is loaded and executed, which can negatively affect performance. Linking JavaScript files through a `<link>` tag is not valid, as

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By embedding it directly within the <head> section

By linking it as a stylesheet in the <link> tag

By placing it within a <script> tag inside the <body> section

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