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angular - 如何在两个不同的模块中声明 AppComponent

问题描述

我正在运行包含两个不同应用程序的 Angular 7 项目：

  1. 基本工具
  2. 高级工具

BasicTools 项目指向 basic-main.ts，AdvancedTools 项目指向 advanced-main.ts。从 basic-main.ts 文件，BasicAppModule 被引导，从 advanced-main.ts AdvancedAppModule 被引导。

我有在 BasicAppModule 和 AdvancedAppModule 中都使用的通用 AppComponent 但是在构建应用程序时，我收到错误，因为 AppComponent 被声明为两个模块的一部分。

我尝试在 basic-app.module.ts 中导出 AppComponent，还从 advanced-app.module.ts 中删除了 AppComponent 的声明，但出现错误：AppComponent 应声明为 ngModule 的一部分。

有什么办法可以解决这个问题，因为我在两个模块中都需要 AppComponent。？？

下面是我的 angular.json 文件：

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "BasicTools": {
      "root": "",
      "sourceRoot": "Client",
      "projectType": "application",
      "prefix": "app",
      "schematics": {
        "@schematics/angular:component": {
          "styleext": "scss"
        }
      },
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "wwwroot",
            "index": "Client/index.html",
            "main": "Client/app/basic/basic-main.ts",
            "polyfills": "Client/polyfills.ts",
            "tsConfig": "Client/tsconfig.app.json",
            "assets": [
              "Client/assets"
            ],
            "styles": [
              "Client/styles.scss"
            ],
            "scripts": []
          },
          "configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "Client/environments/environment.ts",
                  "with": "Client/environments/environment.prod.ts"
                }
              ],
              "optimization": true,
              "outputHashing": "none",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "BasicTools:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "BasicTools:build:production"
            }
          }
        }
    },
    "AdvancedTools": {
      "root": "",
      "sourceRoot": "Client",
      "projectType": "application",
      "prefix": "app",
      "schematics": {
        "@schematics/angular:component": {
          "styleext": "scss"
        }
      },
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "wwwroot",
            "index": "Client/index.html",
            "main": "Client/app/advanced/advanced-main.ts",
            "polyfills": "Client/polyfills.ts",
            "tsConfig": "Client/tsconfig.app.json",
            "assets": [
              "Client/assets"
            ],
            "styles": [
              "Client/styles.scss"
            ],
            "scripts": []
          },
          "configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "Client/environments/environment.ts",
                  "with": "Client/environments/environment.prod.ts"
                }
              ],
              "optimization": true,
              "outputHashing": "none",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "AdvancedTools:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "AdvancedTools:build:production"
            }
          }
        }
    },

高级main.ts

import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { environment } from '../../environments/environment';
import { AdvancedAppModule } from '../advanced-app.module';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(AdvancedAppModule);

基本的main.ts

import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { environment } from '../../environments/environment';
import { BasicAppModule } from '../basic-app.module';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(BasicAppModule);

高级-app.module.ts

@NgModule({
  declarations: [ AppComponent ],
  imports: [
    BrowserModule,
    CoreModule,
    SharedModule,
    BasicModule,
    AdvancedModule,
    applicationRoutingInformation
  ],
  providers: [
    { provide: LocationStrategy, useClass: MiPathLocationStrategy }
  ],
  bootstrap: [AppComponent]
})
export class AdvancedAppModule { }

基本-app.module.ts

@NgModule({
  declarations: [ AppComponent ],
  imports: [
    BrowserModule,
    BasicModule,
    CoreModule,
    SharedModule,
    applicationRoutingInformation
  ],
  providers: [
    { provide: LocationStrategy, useClass: MiPathLocationStrategy }
  ],
  bootstrap: [AppComponent]
})
export class BasicAppModule { }

标签： angulartypescript

解决方案

在您的两个根模块配置中创建AppModule导出并将其导入：AppComponent

app.module.ts

@NgModule({
  declarations: [AppComponent],
  exports: [AppComponent]
})
export AppModule {}

基本-app.module.ts

@NgModule({
  imports: [AppModule, ...],
  bootstrap: [AppComponent],
  ...
})
export class BasicAppModule{}

高级-app.module.ts

@NgModule({
  imports: [AppModule, ...],
  bootstrap: [AppComponent],
  ...
})
export class AdvancedAppModule {}

更进一步，如果您在这两个入口模块之间共享 AppComponent 的一些公共依赖项，您可以在AppModule配置中为它们添加提供程序。

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