storybook/docs/snippets/web-components/button-story-action-event-handle.ts.mdx

```ts
// Button.stories.ts

import type { Meta } from '@storybook/web-components';
import { withActions } from '@storybook/addon-actions/decorator';

const meta: Meta = {
  component: 'demo-button',
  parameters: {
    actions: {
      handles: ['mouseover', 'click .btn'],
    },
  },
  decorators: [withActions],
};

export default meta;
```