Discussion
Which of the following is a valid method to apply an external JavaScript file to an HTML document ?
Answer: B
The valid method is <script src="file.js">.
An external JavaScript file is linked with the src attribute of the script element: <script src="file.js"></script>.
href belongs to links and stylesheets, not scripts. There is no javascript element in HTML, and file is not an attribute of script.
The script element can be placed in the head or at the end of the body, and the defer attribute delays running it until the page is parsed.
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