Create a concise, 3-5 word title with an emoji as a title for the chat history, in the given language. Suitable Emojis for the summary can be used to enhance understanding but avoid quotation marks or special formatting. RESPOND ONLY WITH THE TITLE TEXT.

Examples of titles:
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<chat_history>
USER: how does a website determine what js files to load? can the website just change js file names?
ASSISTANT: A website determines which JavaScript (JS) files to load based on how it is coded by the developers. The process generally involves several steps, often initiated from the HTML document that forms the backbone of the website.

### How a Website Loads JavaScript Files:

1. **HTML Script Tags:** 
   - Developers include `<script>` tags within the HTML to specify which JavaScript files should be loaded. These tags can be placed either in the `<head>` section or at the end of the `<body>` section of the HTML document.
   - Example:
     ```html
     <script src="main.js"></script>
     ```

2. **Order and Placement:**
   - The placement of these script tags is crucial since JS files are loaded synchronously by default. Scripts in the `<head>` will load before the DOM is fully rendered; those at the end of `<body>` load after the page content.
   - Developers can use attributes like `async` or `defer` to manage loading order differently.

3. **Dynamic Loading:**
   - JavaScript itself can dynamically load other JS files using methods like `import()` for modules or dynamically creating and appending `<script>` elements to the DOM.

4. **Bundlers and Build Tools:**
   - Many modern web projects use build tools (like Webpack, Rollup, or Parcel) to bundle JavaScript files. This can manage and optimize how JS gets loaded, possibly splitting the code into multiple files for efficiency.

### Can the Website Change JS File Names?

Yes, a website can change its JavaScript file names, but there are considerations:

1. **Update Reference Links:**
   - Whenever JS file names are changed, all references to these files in the HTML or other JS files must also be updated. Failure to do so will result in 404 errors as the old file names will point to non-existent resources.

2. **Caching:**
   - Browsers cache JS files for performance reasons. If you change a file's name (or its path), it forces the browser to fetch the new file instead of relying on the cached version.
   - Developers often use techniques like cache busting, where a query string is appended to the filename, e.g., `main.js?v=1.0`, to ensure the latest version is loaded.

3. **Build Tools:**
   - When using bundlers or build tools, file names may incorporate hashes based on content (`main.d41d8cd98f.js`) to facilitate cache busting automatically. These hashes change if the file content changes.

4. **SEO and Analytics:**
   - Changing JS file names usually won't affect SEO directly since search engines primarily index HTML content. However, if any analytics scripts depend on specific file paths or names, those references will need updates.

5. **Deployment Systems:**
   - Some deployment or server environments may have specific requirements or dependencies on file names, so changes might need coordination with the deployment process.

By carefully managing these updates and using appropriate tools and techniques, changing JS file names can be done efficiently and safely
</chat_history>