9

我想使用延迟加载，但我不明白为什么它不起作用，它给我错误“找不到模块”。
这是我的环境：
- Angular 5.2.1
- .NET Core 2
- Webpack 3.10.0
- angular-router-loader 0.8.2
- @angular/cli 1.6.5
我在 loadChildren 中尝试了不同的路径，但总是没有成功，我也是暂时的禁用所有警卫和儿童路由。我做错什么了？

文件夹 

ClientApp
  app
    components
      users
        users-routing.module.ts
        users.module.ts
  app-routing.module.ts
  app.module.shared.ts

应用程序路由.module.ts 

const appRoutes: Routes = [
    {
        path: 'users',
        loadChildren: './components/users/users.module#UsersModule'/* ,
        canLoad: [AuthGuard] */
    },
    {
        path: '',
        redirectTo: '/login',
        pathMatch: 'full'
    },
    {
        path: '**',
        redirectTo: '/login'
    }
];

@NgModule({
    imports: [
        RouterModule.forRoot(
            appRoutes,
            { enableTracing: false }
        )
    ],
    exports: [
        RouterModule
    ],
    providers: [
        CanDeactivateGuard
    ]
})
export class AppRoutingModule { }

用户路由.module.ts

const usersRoutes: Routes = [
    {
        path: '',
        component: UsersComponent/* ,
        //canActivate: [AuthGuard],
        children: [
            {
                path: 'detail',
                canActivateChild: [AuthGuard],
                children: [
                    {
                        path: ':id',
                        component: UserViewComponent
                    },
                    {
                        path: 'edit/:id',
                        component: UserFormComponent,
                        canDeactivate: [CanDeactivateGuard],
                        resolve: {
                            user: UsersResolver
                          }
                    },
                    {
                        path: '',
                        component: UserFormComponent,
                        canDeactivate: [CanDeactivateGuard]
                    }
                ]
            },
            {
                path: '',
                component: UsersListComponent
            }
        ] */
    }
];

@NgModule({
    imports: [
        RouterModule.forChild(
            usersRoutes
        )
    ],
    exports: [
        RouterModule
    ]
})
export class UsersRoutingModule { }

users.module.ts 

@NgModule({
    imports: [
        CommonModule,
        FormsModule,
        UsersRoutingModule,
        RouterModule
    ],
    declarations: [
        UsersComponent,
        UserFormComponent,
        UsersListComponent,
        UserViewComponent
    ],
    providers: [
        UsersResolver,
        RouterModule
    ]
})
export class UsersModule { }

webpack.config.js 

const path = require('path');
const webpack = require('webpack');
const merge = require('webpack-merge');
const AngularCompilerPlugin = require('@ngtools/webpack').AngularCompilerPlugin;
const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;

module.exports = (env) => {
    // Configuration in common to both client-side and server-side bundles
    const isDevBuild = !(env && env.prod);
    const sharedConfig = {
        stats: {
            modules: false
        },
        context: __dirname,
        resolve: {
            extensions: ['.js', '.ts']
        },
        output: {
            filename: '[name].js',
            publicPath: 'dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
        },
        module: {
            rules: [{
                    test: /\.ts$/,
                    include: /ClientApp/,
                    use: isDevBuild ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader'] : '@ngtools/webpack'
                },
                {
                    test: /\.html$/,
                    use: 'html-loader?minimize=false'
                },
                {
                    test: /\.css$/,
                    use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize']
                },
                {
                    test: /\.(png|jpg|jpeg|gif|svg)$/,
                    use: 'url-loader?limit=25000'
                }
            ],
            loaders: [
                {
                  test: /\.ts$/,
                  loaders: [
                    'awesome-typescript-loader'
                  ]
                },
                {
                  test: /\.(ts|js)$/,
                  loaders: [
                    'angular-router-loader'
                  ]
                }
              ]
        },
        plugins: [new CheckerPlugin()]
    };

    // Configuration for client-side bundle suitable for running in browsers
    const clientBundleOutputDir = './wwwroot/dist';
    const clientBundleConfig = merge(sharedConfig, {
        entry: {
            'main-client': './ClientApp/boot.browser.ts'
        },
        output: {
            path: path.join(__dirname, clientBundleOutputDir)
        },
        plugins: [
            new webpack.DllReferencePlugin({
                context: __dirname,
                manifest: require('./wwwroot/dist/vendor-manifest.json')
            })
        ].concat(isDevBuild ? [
            // Plugins that apply in development builds only
            new webpack.SourceMapDevToolPlugin({
                filename: '[file].map', // Remove this line if you prefer inline source maps
                moduleFilenameTemplate: path.relative(clientBundleOutputDir, '[resourcePath]') // Point sourcemap entries to the original file locations on disk
            })
        ] : [
            // Plugins that apply in production builds only
            new webpack.optimize.UglifyJsPlugin(),
            new AngularCompilerPlugin({
                tsConfigPath: './tsconfig.json',
                entryModule: path.join(__dirname, 'ClientApp/app/app.module.browser#AppModule'),
                exclude: ['./**/*.server.ts']
            })
        ])
    });

    // Configuration for server-side (prerendering) bundle suitable for running in Node
    const serverBundleConfig = merge(sharedConfig, {
        resolve: {
            mainFields: ['main']
        },
        entry: {
            'main-server': './ClientApp/boot.server.ts'
        },
        plugins: [
            new webpack.DllReferencePlugin({
                context: __dirname,
                manifest: require('./ClientApp/dist/vendor-manifest.json'),
                sourceType: 'commonjs2',
                name: './vendor'
            })
        ].concat(isDevBuild ? [] : [
            // Plugins that apply in production builds only
            new AngularCompilerPlugin({
                tsConfigPath: './tsconfig.json',
                entryModule: path.join(__dirname, 'ClientApp/app/app.module.server#AppModule'),
                exclude: ['./**/*.browser.ts']
            })
        ]),
        output: {
            libraryTarget: 'commonjs',
            path: path.join(__dirname, './ClientApp/dist')
        },
        target: 'node',
        devtool: 'inline-source-map'
    });

    return [clientBundleConfig, serverBundleConfig];
};

tsconfig.json 

{
  "compilerOptions": {
    "module": "es2015",
    "moduleResolution": "node",
    "target": "es5",
    "sourceMap": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "skipDefaultLibCheck": true,
    "skipLibCheck": true, // Workaround for https://github.com/angular/angular/issues/17863. Remove this if you upgrade to a fixed version of Angular.
    "strict": true,
    "lib": [ "es6", "dom" ],
    "types": [ "webpack-env" ], 
    "typeRoots": [
      "node_modules/@types"
    ]
  },
  "exclude": [ "bin", "node_modules" ],
  "atom": { "rewriteTsconfig": false }
}

错误信息

未处理的承诺拒绝：找不到模块“./ClientApp/app/components/users/users.module”。; 区域：角度；任务：Promise.then；值：错误：找不到模块“./ClientApp/app/components/users/users.module”。at vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:34015 at ZoneDelegate.invoke (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117428) at Object.onInvoke (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:5604) at ZoneDelegate.invoke (vendor.js?v =AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117427) at Zone.run (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117178) at vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117898 at ZoneDelegate.invokeTask (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117461) at Object. onInvokeTask (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:5595) at ZoneDelegate.invokeTask (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117460) at Zone.runTask (vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:117228) Error: Cannot find module './ ClientApp/app/components/users/users.module'。在http://localhost:5000/dist/vendor.js?v=AdjSBPSITyauSY4VQBBoZmJ6NdWqor7MEuHgdi2Dgko:34015:9 ... [截断]

编辑

链接到 stackblitz 进行测试

4

8 回答 8

25

我找到了两种解决方案（通过编辑的OP）：

  1. 在使用 import 语句解析模块之后，引用该模块：

    从'./components/users/users.module'导入{UsersModule}；

然后以这种方式引用：

{
    path: 'users',
    loadChildren: () => UsersModule,
    canLoad: [AuthGuard]
}

  1. 我已添加ng-router-loader到应用程序 ( npm install ng-router-loader --save-dev) 并像这样设置 Webpack：

         rules: [{
             test: /\.ts$/,
             include: /ClientApp/,
             //use: isDevBuild ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader'] : '@ngtools/webpack'
             use: isDevBuild ? [{ loader: 'ng-router-loader' }, 'awesome-typescript-loader?silent=true', 'angular2-template-loader'] : '@ngtools/webpack'
         },
         {
             test: /\.html$/,
             use: 'html-loader?minimize=false'
         },
         {
             test: /\.css$/,
             use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize']
         },
         {
             test: /\.(png|jpg|jpeg|gif|svg)$/,
             use: 'url-loader?limit=25000'
         }
     ],

然后通过路径引用模块：

    {
        path: 'users',
        loadChildren: './components/users/users.module#UsersModule',
        canLoad: [AuthGuard]
    }
于 2018-01-26T17:01:18.940 回答
4

你可以这样使用：

const rootRoutes: Routes = [
  { path: 'your-path', loadChildren: () => UsersModule }
];
于 2020-07-13T22:59:31.850 回答
3

当前接受的答案建议将 loadChildren 的值从字符串交换为函数，从而消除了在进行生产构建时进行 AOT 编译的可能性。

对我有用的是 1）使用绝对路径 2）将延迟加载的模块作为字符串数组添加到 angular.json 中的项目>“项目名称”>架构师>构建>选项>惰性模块下。路径应与 loadChildren 下定义的路径相同。

因此，就您而言，我认为这应该在您的路由模块中起作用：

loadChildren: 'app/components/users/users.module#UsersModule'

在 angular.json 中，在上面指定的位置添加：

lazyModules: ["app/components/users/users.module"]
于 2019-04-04T12:46:19.333 回答
2

假设这是处理延迟加载的 AppModule，并且您的系统的功能与它属于同一棵树：

routes: Routes = [
    {
        path: 'files-pannel',
        loadChildren: () => import('./module-folder/module-name.module').then(m => m.ModuleName)
    }
];
于 2020-03-20T08:08:45.680 回答
0

它的错字文件夹名称Users不是users：

改变

'./components/users/users.module#UsersModule'

到

'./components/Users/users.module#UsersModule'
于 2018-01-25T11:14:13.333 回答
0

尝试做你的user.module.ts：

import {UserRoutes } from './User.routing'

@NgModule({
    imports: [
        CommonModule,
        FormsModule,
        UsersRoutingModule.forChild(UserRoutes), //<-- for child
        RouterModule
    ],
    declarations: [
        UsersComponent,
        UserFormComponent,
        UsersListComponent,
        UserViewComponent
    ],
    providers: [
        UsersResolver,
        RouterModule
    ]
})
export class UsersModule { }
于 2018-01-25T11:28:21.997 回答
0

通常，这是路径错误。改变路径。

例如，这个解决方案对我有用::

loadChildren: '../changelog/changelog.module#ChangelogModule'

./folder或../folder或folder

于 2018-11-26T13:25:58.853 回答
0

我在加载我的模块时也遇到了同样的问题我收到了这个错误错误：找不到模块'app/users/users.module'然后在弄清楚它是与路径相关的错误之后这个解决方案对我有用希望它对任何人都有帮助在路线中添加此路径

{
   path: 'users',
   loadChildren: '../app/users/users.module#UsersModule'
 }

找出模块文件夹的路径，例如文件夹或 ./folder 或 ../folder

编码快乐！！

于 2020-07-16T14:25:05.930 回答