storybook/docs/snippets/react/app-story-with-mock.ts.mdx

```ts
// App.stories.ts|tsx

import React from 'react';

import { ComponentStory, ComponentMeta } from '@storybook/react';

import App from './App';

export default {
  /* 👇 The title prop is optional.
  * See https://storybook.js.org/docs/react/configure/overview#configure-story-loading
  * to learn how to generate automatic titles
  */
  title: 'App',
  component: App,
} as ComponentMeta<typeof App>;

const Template: ComponentStory<typeof App> = () => <App />;

export const Success = Template.bind({});
Success.parameters = {
  fetch: {
    json: {
      JavaScript: 3390991,
      'C++': 44974,
      TypeScript: 15530,
      CoffeeScript: 12253,
      Python: 9383,
      C: 5341,
      Shell: 5115,
      HTML: 3420,
      CSS: 3171,
      Makefile: 189,
    }
  }
};
```