# 使用 Angular ngx-translate 实现多语言支持

bash
npm install @ngx-translate/core @ngx-translate/http-loader

typescript
// app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule, HttpClient } from '@angular/common/http';
import { TranslateModule, TranslateLoader } from '@ngx-translate/core';
import { TranslateHttpLoader } from '@ngx-translate/http-loader';
import { AppComponent } from './app.component';
export function HttpLoaderFactory(http: HttpClient) {
  return new TranslateHttpLoader(http, './assets/i18n/', '.json');
}
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    TranslateModule.forRoot({
      loader: {
        provide: TranslateLoader,
        useFactory: HttpLoaderFactory,
        deps: [HttpClient]
      }
    })
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

html
  
{{ 'HELLO' | translate }}
  
{{ 'WELCOME_MESSAGE' | translate:{ name: 'John' } }}

typescript
// app.component.ts
import { Component } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  constructor(private translateService: TranslateService) {
    translateService.setDefaultLang('en'); // 设置默认语言
  }
  switchLanguage(language: string) {
    this.translateService.use(language); // 切换语言
  }
}