@jsverse/transloco-preload-langs/fesm2022/jsverse-transloco-preload-langs.mjs.map

Transloco preload languages while idle

{"version":3,"file":"jsverse-transloco-preload-langs.mjs","sources":["../../../../libs/transloco-preload-langs/src/lib/preload-langs.service.ts","../../../../libs/transloco-preload-langs/src/lib/preload-langs.providers.ts","../../../../libs/transloco-preload-langs/src/jsverse-transloco-preload-langs.ts"],"sourcesContent":["import { Inject, Injectable, InjectionToken, OnDestroy } from '@angular/core';\nimport { TranslocoService } from '@jsverse/transloco';\nimport { tap } from 'rxjs/operators';\nimport { forkJoin, Subscription } from 'rxjs';\n\nexport const TRANSLOCO_PRELOAD_LANGUAGES = new InjectionToken<string[]>(\n  'Languages to be preloaded',\n);\n\n@Injectable({ providedIn: 'root' })\nexport class TranslocoPreloadLangsService implements OnDestroy {\n  private readonly idleCallbackId: number | undefined;\n  private subscription: Subscription | null = null;\n\n  constructor(\n    service: TranslocoService,\n    @Inject(TRANSLOCO_PRELOAD_LANGUAGES) langs: string[],\n  ) {\n    if (!langs.length) return;\n\n    this.idleCallbackId = window.requestIdleCallback(() => {\n      const preloads = langs.map((currentLangOrScope) => {\n        const lang = service._completeScopeWithLang(currentLangOrScope);\n\n        return service.load(lang).pipe(\n          tap(() => {\n            if (!service.config.prodMode) {\n              console.log(\n                `%c 👁 Preloaded ${lang}`,\n                'background: #fff; color: #607D8B;',\n              );\n            }\n          }),\n        );\n      });\n      this.subscription = forkJoin(preloads).subscribe();\n    });\n  }\n\n  ngOnDestroy() {\n    if (this.idleCallbackId !== undefined) {\n      window.cancelIdleCallback(this.idleCallbackId);\n    }\n\n    this.subscription?.unsubscribe();\n    // Caretaker note: it's important to clean up references to subscriptions since they save the `next`\n    // callback within its `destination` property, preventing classes from being GC'd.\n    this.subscription = null;\n  }\n}\n","import { APP_INITIALIZER, makeEnvironmentProviders } from '@angular/core';\n\nimport {\n  TRANSLOCO_PRELOAD_LANGUAGES,\n  TranslocoPreloadLangsService,\n} from './preload-langs.service';\n\ninterface IdleDeadline {\n  didTimeout: false;\n  timeRemaining: () => number;\n}\n\nwindow.requestIdleCallback =\n  window.requestIdleCallback ??\n  function (cb: (deadLine: IdleDeadline) => void) {\n    const start = Date.now();\n\n    return setTimeout(function () {\n      cb({\n        didTimeout: false,\n        timeRemaining: function () {\n          return Math.max(0, 50 - (Date.now() - start));\n        },\n      });\n    }, 1);\n  };\n\nwindow.cancelIdleCallback =\n  window.cancelIdleCallback ??\n  function (id: number) {\n    clearTimeout(id);\n  };\n\n// eslint-disable-next-line @typescript-eslint/no-empty-function\nfunction noop() {}\n\nexport function provideTranslocoPreloadLangs(langs: string[]) {\n  return makeEnvironmentProviders([\n    { provide: TRANSLOCO_PRELOAD_LANGUAGES, useValue: langs },\n    {\n      provide: APP_INITIALIZER,\n      useFactory: () => noop,\n      multi: true,\n      deps: [TranslocoPreloadLangsService],\n    },\n  ]);\n}\n","/**\n * Generated bundle index. 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