Angular——模块懒加载

惰性加载可以通过把应用拆分成多个发布包，并按需加载它们，来加速应用的启动时间。

主模块 home.module.ts

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { CommonModule } from '@angular/common';

import { NormalComponent } from './normal/normal.component';
import { NormalModule } from './normal/normal.module';
import { HomeComponent } from './home.component';

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'normal', component: NormalComponent }, // 普通加载
  { path: 'lazy', loadChildren: './lazy/lazy.module#LazyModule' } // 懒加载
];
@NgModule({
  imports: [
    CommonModule,
    NormalModule,
    RouterModule.forChild(routes)
  ],
  declarations: [HomeComponent]
})
export class HomeModule { }

懒加载模块 lazy.module.ts

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { CommonModule } from '@angular/common';
import { LazyComponent } from './lazy.component';

@NgModule({
  imports: [
     CommonModule,
     RouterModule.forChild([{ path: '', component: LazyComponent }])
  ],
  declarations: [LazyComponent]
})
export class LazyModule { }