如何在angular2-meteor app中使用延迟加载

发布时间：2020-12-17 17:17:27 所属栏目：安全来源：网络整理

导读：我正在创建一个angular2流星应用程序,我需要在其中进行延迟加载. 我已经尝试过angular 2 doc for lazy loading. app.routes.ts import { Route } from '@angular/router';import { Meteor } from 'meteor/meteor';import { LoginComponent } from './modules

我正在创建一个angular2流星应用程序,我需要在其中进行延迟加载.

我已经尝试过angular 2 doc for lazy loading.

app.routes.ts

import { Route } from '@angular/router';
import { Meteor } from 'meteor/meteor';
import { LoginComponent } from './modules/loginComponent/login.component';
 export const routes: Route[] = [{
    path: '',redirectTo: "login",pathMatch: "full"
},{
    path: 'login',component: LoginComponent
},{
    path: 'csvtemplate',loadChildren: './modules/core/core.module#CoreModule'
}
];

core.route.ts

const routes: Routes = [
  { path: '',component: TemplateComponent,children: [{
        path: '',redirectTo: 'csvtimeline'
    },{
        path: 'csvtimeline',component: CsvTimelineComponent
    },{
        path: 'csvjson',component: CsvJsonComponent
    },{
        path: 'addcategory',component: CsvAddProductComponent
    },{
        path: 'adduser',component: adduserComponent
    }
    ]
}
];

当我在添加延迟加载后运行我的代码时,我收到此错误.

core.umd.js:3257 EXCEPTION: Uncaught (in promise): ReferenceError: System is not defined
ReferenceError: System is not defined
    at SystemJsNgModuleLoader.loadAndCompile (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:7882:20)
    at SystemJsNgModuleLoader.load (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:7875:64)
    at RouterConfigLoader.loadModuleFactory (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:18376:76)
    at RouterConfigLoader.load (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:18368:52)
    at MergeMapSubscriber.project (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:19111:82)
    at MergeMapSubscriber._tryNext (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:46645:27)
    at MergeMapSubscriber._next (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:46635:18)
    at MergeMapSubscriber.Subscriber.next (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:44167:18)
    at ScalarObservable._subscribe (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:54671:24)
    at ScalarObservable.Observable.subscribe (http://localhost:3000/packages/modules.js?hash=61f678ddc710f75692a22ec6b345330dc289d744:43030:27)

为什么它不工作.我该怎么做才能使它工作？

谁能告诉我如何在angular2-meteor app中使用延迟加载？

解决方法

我认为Angular Meteor现在支持Lazy Loading.这是如何做的代码

import {Route,RouterModule} from '@angular/router';
import {NgModule} from "@angular/core";
import {Home} from "../home/home.component";
import {CheapModule} from "../cheap/cheap.module";

declare global {
  interface NodeModule {
    dynamicImport(path: string): any;
  }
}

export const appRoutes: Route[] = [
  { path: '',component: Home },{
    path: 'cheap-route',loadChildren: () => CheapModule
  },{
    path: 'expensive-route',loadChildren: () => module.dynamicImport('../expensive/expensive.module').then(m => m.default)
  }
];

@NgModule({
  imports: [
    RouterModule.forRoot(appRoutes)
  ],exports: [
    RouterModule
  ]
})

export class AppRoutingModule {}

有关完整示例,请查看此github repo https://github.com/joerex/angular-meteor-lazy-load

（编辑：李大同）

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