{
  // Docs on Firebase hosting configuration: https://firebase.google.com/docs/hosting/full-config
  "hosting": {
    "target": "aio",
    "public": "dist",
    "cleanUrls": true,
    //////////////////////////////////////////////////////////////////////////////////////////////
    // ADDING REDIRECTS
    //
    // In order to permanently redirect a URL to a new address, add an new entry in the `redirects`
    // list:
    // ```json
    // {"type": 301, "source": "/old/url", "destination": "/new/url"}
    // ```
    //
    // This will cause the server to redirect any clients that visit `/old/url` to `/new/url`. At
    // the same time, the ServiceWorker will be automatically configured to let requests for
    // `/old/url` pass through to the server (instead of serving them locally with the cached
    // `index.html`).
    //
    // In addition, you should also add a corresponding testcase in `URLS_TO_REDIRECT.txt` (inside
    // `tests/deployment/shared/`) to ensure that the new redirect behaves as expected.
    //
    // NOTE 1:
    // On clients that still have an old ServiceWorker version installed the next time they visit a
    // recently redirected URL, the ServiceWorker will not yet know to let the request pass through
    // to the server (and get redirected). In such cases, those clients will get a "Page not found"
    // error, as the app tries to load `generated/docs/old/url.json` (which no longer exists). Such
    // errors would typically go away after reloading the page (since the ServiceWorker will have
    // updated to the latest version in the background).
    //
    // This temporary error is usually not a concern, because it only affects clients with an old
    // ServiceWorker version at the time of the first visit and it goes away on reload. If, however,
    // it is important to avoid this error for a specific redirect, you can add an additional
    // redirect entry for the requested JSON file:
    // ```json
    // {"type": 302, "source": "/generated/docs/old/url.json", "destination": "/generated/docs/new/url.json"}
    // ```
    //
    // In order to avoid bloating the redirects config, it is recommended to remove this additional
    // entry after some time has passed, at which point the large majority of existing clients will
    // have switched to an updated ServiceWorker version.
    //
    // NOTE 2:
    // If you decide to add the additional entry described above, keep in mind that the JSON file
    // URL is derived from the page URL by prepending `/generated/docs`, replacing any upper-case
    // letters with the corresponding lower-case ones followed by an underscore (`_`) and appending
    // `.json`.
    //
    // For example, the page URL `/api/forms/FormBuilder` would result in requesting the JSON file
    // `/generated/docs/api/forms/f_ormb_uilder.json`.
    //////////////////////////////////////////////////////////////////////////////////////////////
    "redirects": [
      // A random bad indexed page that used `api/api`
      {"type": 301, "source": "/api/api/:rest*", "destination": "/api/:rest*"},

      // Guide renames/removals
      {"type": 301, "source": "/docs/*/latest/cli-quickstart.html", "destination": "/start"},
      {"type": 301, "source": "/docs/*/latest/glossary.html", "destination": "/guide/glossary"},
      {"type": 301, "source": "/docs/*/latest/quickstart.html", "destination": "/start"},
      {"type": 301, "source": "/docs/*/latest/guide/server-communication.html", "destination": "/guide/http"},
      {"type": 301, "source": "/docs/*/latest/guide/style-guide.html", "destination": "/guide/styleguide"},
      {"type": 301, "source": "/guide/bazel", "destination": "https://github.com/angular/angular/blob/master/packages/bazel/src/schematics/README.md"},
      {"type": 301, "source": "/guide/cli-quickstart", "destination": "/start"},
      {"type": 301, "source": "/guide/service-worker-getstart", "destination": "/guide/service-worker-getting-started"},
      {"type": 301, "source": "/guide/service-worker-comm", "destination": "/guide/service-worker-communications"},
      {"type": 301, "source": "/guide/service-worker-configref", "destination": "/guide/service-worker-config"},
      {"type": 301, "source": "/guide/webpack", "destination": "https://v5.angular.io/guide/webpack"},
      {"type": 301, "source": "/guide/setup", "destination": "/guide/setup-local"},
      {"type": 301, "source": "/guide/setup-systemjs-anatomy", "destination": "/guide/file-structure"},
      {"type": 301, "source": "/guide/change-log", "destination": "https://github.com/angular/angular/blob/master/CHANGELOG.md"},
      {"type": 301, "source": "/guide/quickstart", "destination": "/start"},
      {"type": 301, "source": "/getting-started", "destination": "/start"},
      {"type": 301, "source": "/getting-started/:rest*", "destination": "/start/:rest*"},
      {"type": 301, "source": "/guide/displaying-data", "destination": "/start#template-syntax"},
      {"type": 301, "source": "/guide/updating-to-version-10", "destination": "https://v10.angular.io/guide/updating-to-version-10"},
      {"type": 301, "source": "/guide/updating-to-version-11", "destination": "https://v11.angular.io/guide/updating-to-version-11"},

      // Renaming of Getting Started topics
      {"type": 301, "source": "/start/data", "destination": "/start/start-data"},
      {"type": 301, "source": "/start/deployment", "destination": "/start/start-deployment"},
      {"type": 301, "source": "/start/forms", "destination": "/start/start-forms"},
      {"type": 301, "source": "/start/routing", "destination": "/start/start-routing"},

      // some top level guide pages on old site were moved below the guide folder
      {"type": 301, "source": "/styleguide", "destination": "/guide/styleguide"},
      {"type": 301, "source": "/docs/styleguide", "destination": "/guide/styleguide"},

      // news is now blog
      {"type": 301, "source": "/news*", "destination": "https://blog.angular.io/"},

      // cookbook guides were moved (and sometime renamed or removed)
      {"type": 301, "source": "/docs/*/latest/cookbook", "destination": "/docs"},
      {"type": 301, "source": "/docs/*/latest/cookbook/", "destination": "/docs"},
      {"type": 301, "source": "/docs/*/latest/cookbook/index.html", "destination": "/docs"},
      {"type": 301, "source": "/**/cookbook/ts-to-js*", "destination": "https://v2.angular.io/docs/ts/latest/cookbook/ts-to-js.html"},
      {"type": 301, "source": "/docs/*/latest/cookbook/a1-a2-quick-reference.html", "destination": "/guide/ajs-quick-reference"},
      {"type": 301, "source": "/docs/*/latest/cookbook/component-communication.html", "destination": "/guide/component-interaction"},
      {"type": 301, "source": "/docs/*/latest/cookbook/dependency-injection.html", "destination": "/guide/dependency-injection-in-action"},
      {"type": 301, "source": "/docs/*/latest/cookbook/:cookbook.html", "destination": "/guide/:cookbook"},

      // Forms related code was moved from the `common` to `forms` package (and NgFor was renamed to NgForOf)
      {"type": 301, "source": "/**/NgFor-*", "destination": "/api/common/NgForOf"},
      {"type": 301, "source": "/**/api/common/index/MaxLengthValidator-*", "destination": "/api/forms/MaxLengthValidator"},
      {"type": 301, "source": "/**/api/common/ControlGroup*", "destination": "/api/forms/FormGroup"},
      {"type": 301, "source": "/**/api/common/Control*", "destination": "/api/forms/FormControl"},
      {"type": 301, "source": "/**/api/common/SelectControlValueAccessor-*", "destination": "/api/forms/SelectControlValueAccessor"},
      {"type": 301, "source": "/**/api/common/NgModel", "destination": "/api/forms/NgModel"},

      // `@angular/http` package was removed, and new `HttpClient` APIs are available under `@angular/common/http` package
      {"type": 301, "source": "/api/http", "destination": "/guide/deprecations#http"},
      {"type": 301, "source": "/api/http/**", "destination": "/guide/deprecations#http"},

      // Animations moves, renames and removals
      {"type": 301, "source": "/api/animate/:rest*", "destination": "/api/animations/:rest*"},
      // AnimationStateDeclarationMetadata was removed
      {"type": 301, "source": "/**/AnimationStateDeclarationMetadata*", "destination": "/api/animations"},
      // `AnimationDriver` was moved to the `animations/browser` package
      {"type": 301, "source": "/api/platform-browser/AnimationDriver", "destination": "/api/animations/browser/AnimationDriver"},

      // The `testing` package was renamed to `core/testing`
      {"type": 301, "source": "/api/testing/:api-*", "destination": "/api/core/testing/:api"},

      // CORE_DIRECTIVES & PLATFORM_PIPES were removed and are now in the CommonModule
      {"type": 301, "source": "/**/CORE_DIRECTIVES*", "destination": "/api/common/CommonModule"},
      {"type": 301, "source": "/**/PLATFORM_PIPES*",  "destination": "/api/common/CommonModule"},

      // DirectiveMetadata is now covered by the Directive decorator
      {"type": 301, "source": "/**/DirectiveMetadata-*", "destination": "/api/core/Directive"},

      // OptionalMetadata is now covered by the Optional decorator
      {"type": 301, "source": "/**/OptionalMetadata-*", "destination": "/api/core/Optional"},

      // HTTP_PROVIDERS was removed and is now provided in HttpModule
      {"type": 301, "source": "/**/HTTP_PROVIDERS*", "destination": "/api/http/HttpModule"},

      // URLs that use the old scheme of adding the type to the end (e.g. `SomeClass-class`)
      // (Exclude disambiguated URLs that might be suffixed with `-\d+` (e.g. `SomeClass-1`))
      {"type": 301, "source": "/api/:package/:api-@(class|decorator|directive|function|interface|let|pipe|type|type-alias|var)", "destination": "/api/:package/:api"},
      {"type": 301, "source": "/api/:package/testing/index/:api", "destination": "/api/:package/testing/:api"},
      {"type": 301, "source": "/api/:package/testing/:api-@(class|decorator|directive|function|interface|let|pipe|type|type-alias|var)", "destination": "/api/:package/testing/:api"},
      {"type": 301, "source": "/api/upgrade/:package/index/:api", "destination": "/api/upgrade/:package/:api"},
      {"type": 301, "source": "/api/upgrade/:package/:api-@(class|decorator|directive|function|interface|let|pipe|type|type-alias|var)", "destination": "/api/upgrade/:package/:api"},

      // URLs that use the old scheme before we moved the docs to the angular/angular repo
      {"type": 301, "source": "/docs/*/latest", "destination": "/docs"},
      {"type": 301, "source": "/docs/*/latest/api/", "destination": "/api"},
      {"type": 301, "source": "/docs/*/latest/api/:package", "destination": "/api/:package"},
      {"type": 301, "source": "/docs/*/latest/api/testing/:api-*",  "destination": "/api/core/testing/:api"},
      {"type": 301, "source": "/docs/*/latest/api/:package/:api-*", "destination": "/api/:package/:api"},
      {"type": 301, "source": "/docs/*/latest/api/:package/index/:api-*", "destination": "/api/:package/:api"},
      {"type": 301, "source": "/docs/*/latest/api/:package/testing", "destination": "/api/:package/testing"},
      {"type": 301, "source": "/docs/*/latest/api/:package/testing/index/:api-*", "destination": "/api/:package/testing/:api"},
      {"type": 301, "source": "/docs/*/latest/api/platform-browser/animations/index/:api-*", "destination": "/api/platform-browser/animations/:api"},
      {"type": 301, "source": "/docs/*/latest/api/upgrade/:package/:api-*", "destination": "/api/upgrade/:package/:api"},
      {"type": 301, "source": "/docs/*/latest/api/upgrade/:package/index/:api-*", "destination": "/api/upgrade/:package/:api"},
      {"type": 301, "source": "/docs/*/latest/glossary", "destination": "/guide/glossary"},
      {"type": 301, "source": "/docs/*/latest/guide/", "destination": "/docs"},
      {"type": 301, "source": "/docs/*/latest/guide/lifecycle-hooks", "destination": "/guide/lifecycle-hooks"},
      {"type": 301, "source": "/docs/*/latest/:rest*", "destination": "/:rest*"},
      {"type": 301, "source": "/docs/latest/:rest*", "destination": "/:rest*"},
      {"type": 301, "source": "/docs/styleguide*", "destination": "/guide/styleguide"},
      {"type": 301, "source": "/guide/metadata", "destination": "/guide/aot-compiler"},
      {"type": 301, "source": "/guide/ngmodule", "destination": "/guide/ngmodules"},
      {"type": 301, "source": "/guide/learning-angular*", "destination": "/start"},
      {"type": 301, "source": "/testing", "destination": "/guide/testing"},
      {"type": 301, "source": "/testing/**", "destination": "/guide/testing"},

      // Work around Firebase hosting bug with `/index.html?<query>` leading to infinite redirects.
      // See https://github.com/angular/angular/issues/42518#issuecomment-858545483 for details.
      {"type": 301, "source": "/index.html:query*", "destination": "/:query*"},

      // Strip off the `.html` extension, because Firebase will not do this automatically any more
      // (unless the new URL points to an existing file, which is not necessarily the case here).
      {"type": 301, "source": "/:topLevelFile.html", "destination": "/:topLevelFile"},
      {"type": 301, "source": "/:somePath*/:file.html", "destination": "/:somePath*/:file"},

      // The below paths are referenced in users projects generated by the CLI
      {"type": 301, "source": "/config/tsconfig", "destination": "/guide/typescript-configuration"},
      {"type": 301, "source": "/config/solution-tsconfig", "destination": "https://devblogs.microsoft.com/typescript/announcing-typescript-3-9/#solution-style-tsconfig"},
      {"type": 301, "source": "/config/app-package-json", "destination": "/guide/strict-mode#non-local-side-effects-in-applications"},
      {"type": 301, "source": "/strict", "destination": "/guide/strict-mode"},

      // Use discoverable link for Angular DevTools and redirect to the guide page
      {"type": 301, "source": "/devtools", "destination": "/guide/devtools"},

      // Temporarily serve the guide at `/devtools` as well as `/guide/devtools` until users have
      // their SW updated to a version that knows about the `/devtools` redirect.
      {"type": 302, "source": "/generated/docs/devtools.json", "destination": "/generated/docs/guide/devtools.json"}
    ],
    "rewrites": [
      {
        "source": "**/!(*.*)",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        // All paths (URLs without a file extension).
        "source": "**/!(*.*)",
        "headers": [
          {"key": "Cache-Control", "value": "no-cache"},
          {"key": "Link", "value": "</generated/navigation.json>;rel=preload;as=fetch,</generated/docs/index.json>;rel=preload;as=fetch"}
        ]
      },
      {
        // Images, fonts, (non-hashed) CSS/JS files.
        "source": "**/*.@(gif|jpg|jpeg|png|svg|webp|js|css|eot|otf|ttf|ttc|woff|woff2)",
        "headers": [
          {"key": "Cache-Control", "value": "max-age=86400"}  // 1 day
        ]
      },
      {
        // Hashed CSS/JS files...
        "source": "**/*.+([0-9a-f]).@(css|js)",
        "headers": [
          {"key": "Cache-Control", "value": "max-age=2592000"}  // 30 days
        ]
      }
    ]
  }
}