storybook/docs/snippets/web-components/my-component-play-function-waitfor.js.mdx

```js
// MyComponent.stories.js

import { userEvent, waitFor, within } from '@storybook/testing-library';

export default {
  title: 'WithAsync',
  component: 'demo-my-component',
};

/* See https://storybook.js.org/docs/7.0/web-components/writing-stories/play-function#working-with-the-canvas
 * to learn more about using the canvasElement to query the DOM
 */
export const ExampleAsyncStory = {
  play: async ({ canvasElement }) => {
    const canvas = within(canvasElement);

    const Input = canvas.getByLabelText('Username', {
      selector: 'input',
    });

    await userEvent.type(Input, 'WrongInput', {
      delay: 100,
    });

    // See https://storybook.js.org/docs/7.0/web-components/essentials/actions#automatically-matching-args to learn how to setup logging in the Actions panel
    const Submit = canvas.getByRole('button');
    await userEvent.click(Submit);

    await waitFor(async () => {
      await userEvent.hover(canvas.getByTestId('error'));
    });
  },
};
```