import { ApplicationConfig, ApplicationRef, Type } from '@angular/core';
export declare const INTERNAL_RECTANGULR_PLATFORM_PROVIDERS: ({
    provide: import("@angular/core").InjectionToken<Object>;
    useValue: string;
    multi?: undefined;
    deps?: undefined;
} | {
    provide: import("@angular/core").InjectionToken<readonly (() => void)[]>;
    useValue: () => void;
    multi: boolean;
    deps?: undefined;
} | {
    provide: import("@angular/core").InjectionToken<Document>;
    useValue: {};
    deps: any[];
    multi?: undefined;
})[];
export declare const platformRectangulr: (extraProviders?: import("@angular/core").StaticProvider[]) => import("@angular/core").PlatformRef;
/**
 * Bootstraps an instance of an Angular application and renders a standalone component as the
 * application's root component. More information about standalone components can be found in [this
 * guide](guide/standalone-components).
 *
 * @usageNotes
 * The root component passed into this function *must* be a standalone one (should have the
 * `standalone: true` flag in the `@Component` decorator config).
 *
 * ```typescript
 * @Component({
 *   standalone: true,
 *   template: 'Hello world!'
 * })
 * class RootComponent {}
 *
 * const appRef: ApplicationRef = await bootstrapApplication(RootComponent);
 * ```
 *
 * You can add the list of providers that should be available in the application injector by
 * specifying the `providers` field in an object passed as the second argument:
 *
 * ```typescript
 * await bootstrapApplication(RootComponent, {
 *   providers: [
 *     {provide: BACKEND_URL, useValue: 'https://yourdomain.com/api'}
 *   ]
 * });
 * ```
 *
 * The `importProvidersFrom` helper method can be used to collect all providers from any
 * existing NgModule (and transitively from all NgModules that it imports):
 *
 * ```typescript
 * await bootstrapApplication(RootComponent, {
 *   providers: [
 *     importProvidersFrom(SomeNgModule)
 *   ]
 * });
 * ```
 *
 * Note: the `bootstrapApplication` method doesn't include [Testability](api/core/Testability) by
 * default. You can add [Testability](api/core/Testability) by getting the list of necessary
 * providers using `provideProtractorTestingSupport()` function and adding them into the `providers`
 * array, for example:
 *
 * ```typescript
 * import {provideProtractorTestingSupport} from '@angular/platform-browser';
 *
 * await bootstrapApplication(RootComponent, {providers: [provideProtractorTestingSupport()]});
 * ```
 *
 * @param rootComponent A reference to a standalone component that should be rendered.
 * @param options Extra configuration for the bootstrap operation, see `ApplicationConfig` for
 *     additional info.
 * @returns A promise that returns an `ApplicationRef` instance once resolved.
 *
 * @publicApi
 */
export declare function bootstrapApplication(rootComponent: Type<unknown>, options?: ApplicationConfig): Promise<ApplicationRef>;