This is the Preview
\n );\n }\n\n handleAPI(api) {\n // no need to do anything for now.\n }\n}\n```\n\nThen you need to initialize the UI like this:\n\n```js\nimport { document } from 'global';\nimport renderStorybookUI from '@storybook/ui';\nimport Provider from './provider';\n\nconst roolEl = document.getElementById('root');\nrenderStorybookUI(roolEl, new Provider());\n```\n\n> **See the [example](./example) app for a complete example.**\n\n## API\n\n### .setOptions()\n\n```js\nimport { Provider } from '@storybook/ui';\n\nclass ReactProvider extends Provider {\n handleAPI(api) {\n api.setOptions({\n // see available options in\n // https://github.com/storybooks/storybook/tree/master/addons/options#getting-started\n });\n }\n};\n```\n\n## .setStories()\n\nThis API is used to pass the`kind` and `stories` list to storybook-ui.\n\n```js\nimport { Provider } from '@storybook/ui';\n\nclass ReactProvider extends Provider {\n handleAPI(api) {\n api.setStories([\n {\n kind: 'Component 1',\n stories: ['State 1', 'State 2']\n },\n\n {\n kind: 'Component 2',\n stories: ['State a', 'State b']\n }\n ]);\n }\n}\n```\n\n## .onStory()\n\nYou can use to listen to the story change and update the preview.\n\n```js\nimport { Provider } from '@storybook/ui';\n\nclass ReactProvider extends Provider {\n handleAPI(api) {\n api.onStory((kind, story) => {\n this.globalState.emit('change', kind, story);\n });\n }\n}\n```\n\n## Hacking Guide\n\nIf you like to add features to the Storybook UI or fix bugs, this is the guide you need to follow.\n\nFirst of all, you can need to start the [example](./example) app to see your changes.\n\n### The App\n\nThis is a Redux app written based on the [Mantra architecture](https://github.com/kadirahq/mantra/).\nIt's a set of modules. You can see those modules at `src/modules` directory.\n\n### Changing UI\n\nIf you like to change the appearance of the UI, you need to look at the `ui` module. Simply change components at the `components` directory for simple UI tweaks.\n\nYou can also change containers(which are written with [react-komposer](https://github.com/kadirahq/react-komposer/)) to add more data from the redux state.\n\n### Mounting\n\nThe UI is mounted in the `src/modules/ui/routes.js`. Inside that, we have injected dependencies as well. Refer [mantra-core](https://github.com/mantrajs/mantra-core) for that.\n\nWe've injected the context and actions.\n\n### App Context\n\nApp context is the app which application context you initialize when creating the UI. It is initialized in the `src/index.js` file. It's a non serializable state. You can access the app context from containers and basically most of the place in the app.\n\nSo, that's the place to put app wide configurations and objects which won't changed after initialized. Our redux store is also stayed inside the app context.\n\n### Actions\n\nActions are the place we implement app logic in a Mantra app. Each module has a set of actions and they are globally accessible. These actions are located at `