What is nestjs-i18n?
nestjs-i18n is a powerful internationalization (i18n) module for NestJS applications. It provides a comprehensive set of tools to manage translations, handle localization, and support multiple languages in a NestJS application.
What are nestjs-i18n's main functionalities?
Basic Setup
This code sets up the basic configuration for nestjs-i18n. It initializes the I18nModule with a fallback language and specifies the parser and the path to the translation files.
```typescript
import { Module } from '@nestjs/common';
import { I18nModule, I18nJsonParser } from 'nestjs-i18n';
import * as path from 'path';
@Module({
imports: [
I18nModule.forRoot({
fallbackLanguage: 'en',
parser: I18nJsonParser,
parserOptions: {
path: path.join(__dirname, '/i18n/'),
},
}),
],
})
export class AppModule {}
```
Translation Service
This code demonstrates how to use the I18nService to translate a message. The `translate` method is used to fetch the translation for the given key ('HELLO_MESSAGE').
```typescript
import { Injectable } from '@nestjs/common';
import { I18nService } from 'nestjs-i18n';
@Injectable()
export class AppService {
constructor(private readonly i18n: I18nService) {}
async getHello(): Promise<string> {
return this.i18n.translate('HELLO_MESSAGE');
}
}
```
Request Scoped Translations
This code shows how to use request-scoped translations. By injecting the I18nContext into the controller method, you can translate messages based on the current request's language.
```typescript
import { Controller, Get } from '@nestjs/common';
import { I18n, I18nContext } from 'nestjs-i18n';
@Controller()
export class AppController {
@Get()
async getHello(@I18n() i18n: I18nContext): Promise<string> {
return i18n.translate('HELLO_MESSAGE');
}
}
```
Other packages similar to nestjs-i18n
i18next
i18next is a popular internationalization framework for JavaScript applications. It provides a wide range of features for managing translations and supports various backends for loading translation files. Compared to nestjs-i18n, i18next is more general-purpose and can be used with any JavaScript framework, not just NestJS.
nestjs-i18n
nestjs-i18n is another internationalization module for NestJS. It offers similar functionalities to nestjs-i18n, such as managing translations and supporting multiple languages. However, it may have different configuration options and features.
react-i18next
react-i18next is a powerful internationalization library specifically designed for React applications. It builds on top of i18next and provides React-specific bindings. While it offers similar translation management features, it is tailored for use with React rather than NestJS.