angular-cn/packages/examples/upgrade/static/ts/lite-multi-shared/module.ts

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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Compiler, Component, getPlatform, Injectable, Injector, NgModule, StaticProvider} from '@angular/core';
import {BrowserModule} from '@angular/platform-browser';
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {downgradeComponent, downgradeModule} from '@angular/upgrade/static';
declare var angular: ng.IAngularStatic;
// An Angular service provided in root. Each instance of the service will get a new ID.
@Injectable({providedIn: 'root'})
export class Ng2Service {
static nextId = 1;
id = Ng2Service.nextId++;
}
// An Angular module that will act as "root" for all downgraded modules, so that injectables
// provided in root will be available to all.
@NgModule({
imports: [BrowserModule],
})
export class Ng2RootModule {
ngDoBootstrap() {}
}
// An Angular module that declares an Angular component,
// which in turn uses an Angular service from the root module.
@Component({
selector: 'ng2A',
template: 'Component A (Service ID: {{ service.id }})',
})
export class Ng2AComponent {
constructor(public service: Ng2Service) {}
}
@NgModule({
declarations: [Ng2AComponent],
entryComponents: [Ng2AComponent],
})
export class Ng2AModule {
ngDoBootstrap() {}
}
// Another Angular module that declares an Angular component, which uses the same service.
@Component({
selector: 'ng2B',
template: 'Component B (Service ID: {{ service.id }})',
})
export class Ng2BComponent {
constructor(public service: Ng2Service) {}
}
@NgModule({
declarations: [Ng2BComponent],
entryComponents: [Ng2BComponent],
})
export class Ng2BModule {
ngDoBootstrap() {}
}
// A third Angular module that declares an Angular component, which uses the same service.
@Component({
selector: 'ng2C',
template: 'Component C (Service ID: {{ service.id }})',
})
export class Ng2CComponent {
constructor(public service: Ng2Service) {}
}
@NgModule({
imports: [BrowserModule],
declarations: [Ng2CComponent],
entryComponents: [Ng2CComponent],
})
export class Ng2CModule {
ngDoBootstrap() {}
}
// The downgraded Angular modules. Modules A and B share a common root module. Module C does not.
// #docregion shared-root-module
let rootInjectorPromise: Promise<Injector>|null = null;
const getRootInjector = (extraProviders: StaticProvider[]) => {
if (!rootInjectorPromise) {
rootInjectorPromise = platformBrowserDynamic(extraProviders)
.bootstrapModule(Ng2RootModule)
.then(moduleRef => moduleRef.injector);
}
return rootInjectorPromise;
};
const downgradedNg2AModule = downgradeModule(async (extraProviders: StaticProvider[]) => {
const rootInjector = await getRootInjector(extraProviders);
const moduleAFactory = await rootInjector.get(Compiler).compileModuleAsync(Ng2AModule);
return moduleAFactory.create(rootInjector);
});
const downgradedNg2BModule = downgradeModule(async (extraProviders: StaticProvider[]) => {
const rootInjector = await getRootInjector(extraProviders);
const moduleBFactory = await rootInjector.get(Compiler).compileModuleAsync(Ng2BModule);
return moduleBFactory.create(rootInjector);
});
// #enddocregion shared-root-module
const downgradedNg2CModule = downgradeModule(
(extraProviders: StaticProvider[]) =>
(getPlatform() || platformBrowserDynamic(extraProviders)).bootstrapModule(Ng2CModule));
// The AngularJS app including downgraded modules and components.
// #docregion shared-root-module
const appModule =
angular
.module(
'exampleAppModule', [downgradedNg2AModule, downgradedNg2BModule, downgradedNg2CModule])
// #enddocregion shared-root-module
.component('exampleApp', {template: '<ng2-a></ng2-a> | <ng2-b></ng2-b> | <ng2-c></ng2-c>'})
.directive('ng2A', downgradeComponent({
component: Ng2AComponent,
// Since there is more than one downgraded Angular module,
// specify which module this component belongs to.
downgradedModule: downgradedNg2AModule,
propagateDigest: false,
}))
.directive('ng2B', downgradeComponent({
component: Ng2BComponent,
// Since there is more than one downgraded Angular module,
// specify which module this component belongs to.
downgradedModule: downgradedNg2BModule,
propagateDigest: false,
}))
.directive('ng2C', downgradeComponent({
component: Ng2CComponent,
// Since there is more than one downgraded Angular module,
// specify which module this component belongs to.
downgradedModule: downgradedNg2CModule,
propagateDigest: false,
}));
// Bootstrap the AngularJS app.
angular.bootstrap(document.body, [appModule.name]);