# Form Submission Prevention

## Overview

The application now includes automatic double-submission prevention for all forms. This feature prevents users from accidentally submitting the same form multiple times by disabling submit buttons after the first click.

## Implementation

### Files Modified/Created

1. **`public/js/custom.js`** - Contains the JavaScript logic
2. **`config/adminlte.php`** - Added CustomJS plugin configuration
3. **`resources/js/app.js`** - Contains the same logic for Vite-compiled assets

## How It Works

When any form is submitted:

1. **Button Disabling**: All submit buttons (`<button type="submit">` and `<input type="submit">`) in the form are immediately disabled
2. **Visual Feedback**: For button elements, the content changes to show a spinner icon and "Processing..." text
3. **Automatic Re-enable**: After 5 seconds, buttons are re-enabled as a safety measure (in case form validation fails or the page doesn't navigate)

## Example

**Before submission:**
```html
<button type="submit" class="btn btn-primary">Save Employee</button>
```

**After clicking (during processing):**
```html
<button type="submit" class="btn btn-primary disabled" disabled>
    <i class="fas fa-spinner fa-spin"></i> Processing...
</button>
```

## Excluding Forms or Buttons

If you need to exclude a specific form or button from this behavior, add the `data-no-disable` attribute:

### Exclude entire form:
```html
<form action="..." method="POST" data-no-disable>
    <!-- This form will not have disabled buttons -->
</form>
```

### Exclude specific button:
```html
<button type="submit" class="btn btn-primary" data-no-disable>
    Submit Without Disable
</button>
```

## Additional Features

The `custom.js` file also includes:

- **Auto-hide alerts**: Success and info alerts automatically fade out after 5 seconds
- Error alerts (`alert-danger`) remain visible until manually dismissed
- Alerts with `alert-permanent` class are never auto-hidden

## Browser Compatibility

This feature works in all modern browsers that support:
- `addEventListener`
- `querySelectorAll`
- `setTimeout`
- ES6 arrow functions

## Testing

To test the feature:

1. Navigate to any form in the application (e.g., `/admin/hr/employees/create`)
2. Fill out the form
3. Click the submit button
4. Observe:
   - Button becomes disabled immediately
   - Text changes to "Processing..." with a spinner
   - After form submission or 5 seconds, button re-enables

## Troubleshooting

### Buttons don't re-enable
- Check browser console for JavaScript errors
- Ensure `custom.js` is loaded (check Network tab in DevTools)
- Verify the timeout is completing (should take 5 seconds)

### Feature not working at all
- Clear application cache: `php artisan cache:clear`
- Clear config cache: `php artisan config:clear`
- Rebuild assets: `npm run build`
- Check that `CustomJS` plugin is active in `config/adminlte.php`

### Need to disable for AJAX forms
- Add `data-no-disable` attribute to the form element
- Or handle the button state manually in your AJAX callbacks

## Future Enhancements

Potential improvements:
- Configurable timeout duration
- Different visual feedback options
- Integration with Laravel validation error display
- AJAX form support with automatic re-enabling on error
