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next.js/examples/with-react-intl/README.md
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[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-react-intl)
# Example app with [React Intl][]
## How to use
Download the example [or clone the repo](https://github.com/zeit/next.js.git):
```bash
curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/with-react-intl
cd with-react-intl
```
Install it and run:
```bash
npm install
npm run dev
```
Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
```bash
now
```
## The idea behind the example
This example app shows how to integrate [React Intl][] with Next.
### Features of this example app
- Server-side language negotiation
- React Intl locale data loading via `pages/_document.js` customization
- React Intl integration at Next page level via `pageWithIntl()` HOC
- `<IntlProvider>` creation with `locale`, `messages`, and `initialNow` props
- Default message extraction via `babel-plugin-react-intl` integration
- Translation management via build script and customized Next server
### Translation Management
This app stores translations and default strings in the `lang/` dir. This dir has `.messages/` subdir which is where React Intl's Babel plugin outputs the default messages it extracts from the source code. The default messages (`en.json` in this example app) is also generated by the build script. This file can then be sent to a translation service to perform localization for the other locales the app should support.
The translated messages files that exist at `lang/*.json` are only used during production, and are automatically provided to the `<IntlProvider>`. During development the `defaultMessage`s defined in the source code are used. To prepare the example app for localization and production run the build script and start the server in production mode:
```
$ npm run build
$ npm start
```
You can then switch your browser's language preferences to French and refresh the page to see the UI update accordingly.
[React Intl]: https://github.com/yahoo/react-intl