Why isn’t my external JavaScript file running in HTML?

If you are not importing the function into another JavaScript module, you do not need `export default` at all. You can define the function normally, include the file with ``, and call it after the page has loaded. With a Vue project, though, it is usually better to let Vue’s build setup handle modules instead of adding scripts directly to the HTML.

If the folder is actually named `scr`, the path must be `scr/main.js`; otherwise rename or use the `src` folder consistently. You can check the browser’s developer tools and Network tab to see whether the file URL returns a 404.

There are a few separate issues here. First, the attribute is `src`, not `scr`. Since the file uses `export`, load it as a module:

Also, declaring the function does not run it. Call `Message()` after the function definition, or import the function from another module and call it there.

Make sure the element with ID `logged_in_message` exists before the function runs. Put the module script near the end of the body, or use `defer` for a regular script. For example:

Then in `main.js`:

export default function Message() {
const messageDisplay = document.getElementById("logged_in_message");
messageDisplay.innerHTML = "Based on your interests";
}

Message();