# Front-end Development
This section explains how to create your plugin interface in the admin panel. Refer to the Plugin Development [Quick Start Section](./quick-start.md) to start the project in development mode.
## Introduction
Strapi's admin panel and plugins system aim to be an easy and powerful way to create new features.
The admin panel is a [React](https://facebook.github.io/react/) application which can embed other React applications. These other React applications are the `admin` parts of each Strapi's plugins.
## Routing
The routing is based on the [React Router V4](https://reacttraining.com/react-router/web/guides/philosophy), due to it's implementation each route is declared in the `containers/App/index.js` file.
Also, we chose to use the [Switch Router](https://reacttraining.com/react-router/web/api/Switch) because it renders a route exclusively.
**Route declaration :**
Let's say that you want to create a route `/user` with params `/:id` associated with the container UserPage.
The declaration would be as followed :
**Path —** `plugins/my-plugin/admin/src/containers/App/index.js`.
```js
import React from 'react';
import UserPage from 'containers/UserPage';
// ...
class App extends React.Component {
// ...
render() {
return (
);
}
}
// ...
```
See the [Front-end Use Cases](./frontend-use-cases.md#handle-user-navigation) for more informations.
## Data flow
Each plugin has its own data store, so it stays completely independent from the others.
Data flow is controlled thanks to Redux and redux-sagas.
## Styling
The [Bootstrap styles](http://getbootstrap.com/) are inherited by the plugins. However, each component has its own styles, so it possible to completely customize it.
**See the [plugin styles](../concepts/concepts.md#plugin-styles) for informations on its concept.**
To style a plugin component:
- Add a `styles.scss` file in the component directory
- Require it from the `index.js` file (`import styles from './styles.scss';`)
- Add some styles in the `styles.scss` file
```
.wrapper {
display: block;
background: red;
height: 100px;
width: 100px;
}
```
Use this style in the component: ``.
Note: if you want to use several classes:
```js
import cn from 'classnames';
import styles from './styles.scss';
// ...
return (
{this.props.children}
);
// ...
```
## i18n
[React Intl](https://github.com/yahoo/react-intl) provides React components and an API to format dates, numbers, and strings, including pluralization and handling translations.
**Usage**
We recommend to set all your components text inside the translations folder.
The example below shows how to use i18n inside your plugin.
**Define all your ids with the associated message:**
**Path —** `./plugins/my-plugin/admin/src/translations/en.json`.
```json
{
"notification.error.message": "An error occurred"
}
```
**Path —** `./plugins/my-plugin/admin/src/translations/fr.json`
```json
{
"notification.error.message": "Une erreur est survenue"
}
```
**Usage inside a component**
**Path —** `./plugins/my-plugin/admin/src/components/Foo/index.js`.
```js
import { FormattedMessage } from 'react-intl';
import SomeOtherComponent from 'components/SomeOtherComponent';
const Foo = (props) => (
)
export default Foo;
```
See [the documentation](https://github.com/yahoo/react-intl/wiki/Components#formattedmessage) for more extensive usage.
## Generators
You can use generators to create React components or containers for your plugin.
1. In your terminal go to your plugin folder `cd plugins/my-plugin`
2. Run `npm run generate` and choose the type of component your want to create