Learn how to use JavaScript’s fs library module to create, read, write, and stream common file types in the JavaScript runtimes Node, Deno, and Bun.

Test the search engine’s ability to account for dynamically inserted text when the text is outside the HTML source of the page (in an external JavaScript file).

Whereas, always use an external JavaScript file for websites that have multiple web pages. Why do WordPress plugins like Autoptimize aggregate JavaScript Code in one file?