# react-native-i18n
Integrates [I18n.js](https://github.com/fnando/i18n-js) with React Native. Uses the user preferred locale as default.
## Installation
**Using yarn ()**
`$ yarn add react-native-i18n`
**Using npm**
`$ npm install react-native-i18n --save`
NB: npm 5 currently has an issue resolving git sub-dependencies.
Check [this issue](https://github.com/AlexanderZaytsev/react-native-i18n/issues/101) for more informations.
## Automatic setup
After installing the npm package you need to link the native modules.
If you're using React-Native < 0.29, install [rnpm](https://github.com/rnpm/rnpm) with the command `npm install -g rnpm` and then link the library with the command `rnpm link`.
If you're using React-Native >= 0.29 just link the library with the command `react-native link`.
If you're having any issue you can also try to install the library manually as follows.
## Manual setup
### iOS
Add `RNI18n.xcodeproj` to **Libraries** and add `libRNI18n.a` to **Link Binary With Libraries** under **Build Phases**.
[More info and screenshots about how to do this is available in the React Native documentation](http://facebook.github.io/react-native/docs/linking-libraries-ios.html#content).
You also need to add the **localizations** you intend to support to your iOS project. To do that open your Xcode project:
```
$ open .xcodeproj
```
And add the localizations you will support as shown here:
### Android
Add `react-native-i18n` to your `./android/settings.gradle` file as follows:
```
include ':app', ':react-native-i18n'
project(':react-native-i18n').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-i18n/android')
```
Include it as dependency in `./android/app/build.gradle` file:
```
dependencies {
...
compile project(':react-native-i18n')
}
```
Finally, you need to add the package to your MainApplication (`./android/app/src/main/java/your/bundle/MainApplication.java`):
```java
import com.AlexanderZaytsev.RNI18n.RNI18nPackage; // <-- Add to ReactNativeI18n to the imports
...
@Override
protected List getPackages() {
return Arrays.asList(
new MainReactPackage(),
...
new RNI18nPackage(), // <-- Add it to the packages list
...
);
}
...
```
After that, you will need to recompile your project with `react-native run-android`.
**Note: You'll need to install Android build tools 25.0.2**
![https://github.com/AlexanderZaytsev/react-native-i18n/blob/master/docs/android-install.png?raw=true]()
## Usage
```javascript
import I18n from 'react-native-i18n'
class Demo extends React.Component {
render () {
return (
{I18n.t('greeting')}
)
}
}
// Enable fallbacks if you want `en-US` and `en-GB` to fallback to `en`
I18n.fallbacks = true
I18n.translations = {
en: {
greeting: 'Hi!'
},
fr: {
greeting: 'Bonjour!'
}
}
```
This will render `Hi!` for devices with the English locale, and `Bonjour!` for devices with the French locale.
## Usage with multiple location files
```javascript
// app/i18n/locales/en.js
export default {
greeting: 'Hi!'
};
// app/i18n/locales/fr.js
export default {
greeting: 'Bonjour!'
};
// app/i18n/i18n.js
import I18n from 'react-native-i18n';
import en from './locales/en';
import fr from './locales/fr';
I18n.fallbacks = true;
I18n.translations = {
en,
fr
};
export default I18n;
// usage in component
import I18n from 'app/i18n/i18n';
class Demo extends React.Component {
render () {
return (
{I18n.t('greeting')}
)
}
}
```
### Fallbacks
When fallbacks are enabled (which is generally recommended), `i18n.js` will try to look up translations in the following order (for a device with `en_US` locale):
- en-US
- en
**Note**: iOS 8 locales use underscored (`en_US`) but `i18n.js` locales are dasherized (`en-US`). This conversion is done automatically for you.
```js
I18n.fallbacks = true
I18n.translations = {
'en': {
greeting: 'Hi!'
},
'en-GB': {
greeting: 'Hi from the UK!'
}
}
```
For a device with a `en_GB` locale this will return `Hi from the UK!'`, for a device with a `en_US` locale it will return `Hi!`.
### Device's locales
You can get the user preferred locales with the `getLanguages` method:
```js
import { getLanguages } from 'react-native-i18n'
getLanguages().then(languages => {
console.log(languages) // ['en-US', 'en']
})
```
### I18n.js documentation
For more info about I18n.js methods (`localize`, `pluralize`, etc) and settings see [its documentation](https://github.com/fnando/i18n-js#setting-up).
## Licence
MIT