Yes, JavaScript will work with this setup without any issues. You can include JavaScript directly in your HTML files or create separate `.js` files and include them. There is no need to create handlers in the Python code for JavaScript to work.

To include JavaScript directly in your HTML file, you can use the `<script>` tag:

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <!-- ... -->
</head>
<body>
    <!-- ... -->

    <script>
        // Your JavaScript code here
        document.addEventListener('DOMContentLoaded', function() {
            console.log("Hello from JavaScript!");
        });
    </script>
</body>
</html>
```

Alternatively, you can create a separate JavaScript file (e.g., `main.js`) and include it in your HTML file:

1. Create a `main.js` file in the `static` folder and add your JavaScript code:

```javascript
// main.js
document.addEventListener('DOMContentLoaded', function() {
    console.log("Hello from JavaScript!");
});
```

2. Include the `main.js` file in your `index.html` file:

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <!-- ... -->
</head>
<body>
    <!-- ... -->

    <script src="{{ url_for('static', filename='main.js') }}"></script>
</body>
</html>
```

This way, you can utilize JavaScript for client-side interactivity and logic while using Python and Flask for server-side tasks.
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