client/src/main.ts


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import { enableProdMode, TRANSLATIONS, TRANSLATIONS_FORMAT } from '@angular/core'
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'

import { AppModule } from './app/app.module'
import { environment } from './environments/environment'

import { hmrBootstrap } from './hmr'

let providers = []
if (environment.production) {
  enableProdMode()
}

if (environment.production === false && window.location.search === '?lang=fr') {
  const translations = require(`raw-loader!./locale/target/messages_fr.xml`)

  providers = [
    { provide: TRANSLATIONS, useValue: translations },
    { provide: TRANSLATIONS_FORMAT, useValue: 'xlf' }
  ]
}

const bootstrap = () => platformBrowserDynamic()
  .bootstrapModule(AppModule, { providers })
  .then(bootstrapModule => {
    // TODO: Uncomment and remove unregistration when https://github.com/angular/angular/issues/21191 is fixed
    // TODO: Remove when https://github.com/angular/angular-cli/issues/8779 is fixed?
    // if ('serviceWorker' in navigator && environment.production) {
    //   navigator.serviceWorker.register('/ngsw-worker.js')
    //     .catch(err => console.error('Cannot register service worker.', err))
    // }

    if (navigator.serviceWorker) {
      navigator.serviceWorker.getRegistrations()
        .then(registrations => {
          for (const registration of registrations) {
            registration.unregister()
          }
        })
    }

    return bootstrapModule
  })
  .catch(err => {
    console.error(err)
    return null
  })

if (environment.hmr) {
  if (module[ 'hot' ]) {
    hmrBootstrap(module, bootstrap)
  } else {
    console.error('HMR is not enabled for webpack-dev-server!')
    console.log('Are you using the --hmr flag for ng serve?')
  }
} else {
  bootstrap()
}