模組化
在 Angular 模組 我們練習先建立一個模組(NgModule),然後在上面建立元件(Component),今天我們試著反過來將既有的元件包覆到一個模組內。
重整
先將用不到的元件及模組刪除:PagexComponent、OptxComponent、OperationModule,直接刪除檔案,再將把註冊相關元件的模組(src\app\app.module.ts
、src\app\app-routing.module.ts
)程式碼給移除。
app.module.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
| import { BrowserAnimationsModule } from '@angular/platform-browser/animations'; import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core';
import { AppRoutingModule } from './app-routing.module'; import { AppComponent } from './app.component'; import { Page404Component } from './page404/page404.component'; import { CustomMaterialModule } from './custom-material.module'; import { HomeModule } from './home/home.module';
@NgModule({ declarations: [ AppComponent, Page404Component ], imports: [ BrowserModule, AppRoutingModule, BrowserAnimationsModule, CustomMaterialModule, HomeModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { }
|
app-routing.module.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router'; import { Page404Component } from './page404/page404.component';
const routes: Routes = [ { path: '', redirectTo: 'home', pathMatch: 'full' }, { path: '404', component: Page404Component } ];
@NgModule({ imports: [RouterModule.forRoot(routes)], exports: [RouterModule] }) export class AppRoutingModule { }
|
因為 src\app\app.component.html
只有一行語法,所以直接將它併入 src\app\app.component.ts
,相關的樣板檔(app.component.scss
)以及測試檔(app.component.spec.ts
)可以先移除,後續有需要時再加回來。
app.component.ts1 2 3 4 5 6 7 8
| import { Component } from '@angular/core';
@Component({ selector: 'app-root', template: `<router-outlet></router-outlet>` }) export class AppComponent { }
|
整個專案應該會變乾淨很多。
建立模組
開始將在 Angular 子路由 所建立的功能元件都合併到一個模組內。
透過 ng g m employee
建立一個 EmployeeModule 模組。
將相關模組移動到 src\app\employee
下面,在可以透過 VS Code 的檔案總管用滑鼠直接拖拉,並將相關元件註冊到 src\app\employee\employee.module.ts
。
employee.module.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
| import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { CalendarComponent } from './calendar/calendar.component'; import { AddressBookComponent } from './address-book/address-book.component'; import { LogbookComponent } from './logbook/logbook.component'; import { ToDoListComponent } from './to-do-list/to-do-list.component'; import { FileComponent } from './file/file.component'; import { LeaveComponent } from './leave/leave.component'; import { ReimburseComponent } from './reimburse/reimburse.component';
@NgModule({ imports: [ CommonModule ], declarations: [ CalendarComponent, AddressBookComponent, LogbookComponent, ToDoListComponent, FileComponent, LeaveComponent, ReimburseComponent ] }) export class EmployeeModule { }
|
再將相關元件從 src\app\home\home.module.ts
中移除參考,並將 EmployeeModule 註冊進來。
home.module.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
| import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common';
import { HomeRoutingModule } from './home-routing.module'; import { HomeComponent } from './home.component'; import { HeaderComponent } from './header/header.component'; import { AsideComponent } from './aside/aside.component'; import { CustomMaterialModule } from '../custom-material.module'; import { EmployeeModule } from '../employee/employee.module';
@NgModule({ imports: [ CommonModule, HomeRoutingModule, CustomMaterialModule, EmployeeModule ], declarations: [ HomeComponent, HeaderComponent, AsideComponent ] }) export class HomeModule { }
|
最後的問題大概就是 HomeRoutingModule(src\app\home\home-routing.module.ts
) 的路由規則要如何處理?
home-routing.module.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
| import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router'; import { HomeComponent } from './home.component'; import { CalendarComponent } from './calendar/calendar.component'; import { AddressBookComponent } from './address-book/address-book.component'; import { FileComponent } from './file/file.component'; import { LeaveComponent } from './leave/leave.component'; import { LogbookComponent } from './logbook/logbook.component'; import { ReimburseComponent } from './reimburse/reimburse.component'; import { ToDoListComponent } from './to-do-list/to-do-list.component';
const routes: Routes = [ { path: 'home', component: HomeComponent, children: [ { path: '', redirectTo: 'to-do-list', pathMatch: 'full' }, { path: 'address-book', component: AddressBookComponent }, { path: 'calendar', component: CalendarComponent }, { path: 'file', component: FileComponent }, { path: 'leave', component: LeaveComponent }, { path: 'logbook', component: LogbookComponent }, { path: 'reimburse', component: ReimburseComponent }, { path: 'to-do-list', component: ToDoListComponent } ] } ];
@NgModule({ imports: [RouterModule.forChild(routes)], exports: [RouterModule] }) export class HomeRoutingModule { }
|
比較好的做法應該是將路由規則 path:'home'
下 children
屬性內的路由規則都移到 src\app\employee\
資料夾內,維護上會比較方便。
我們先在 employee 資料夾內建立一個存放路由規則的 ts 檔(src\app\employee\employee.routing.ts
),在將路由規則搬移至此,最後再將路由規則 export 出來。
employee.routing.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
| import { Routes } from '@angular/router'; import { AddressBookComponent } from './address-book/address-book.component'; import { CalendarComponent } from './calendar/calendar.component'; import { FileComponent } from './file/file.component'; import { LeaveComponent } from './leave/leave.component'; import { LogbookComponent } from './logbook/logbook.component'; import { ReimburseComponent } from './reimburse/reimburse.component'; import { ToDoListComponent } from './to-do-list/to-do-list.component';
const routes: Routes = [ { path: '', redirectTo: 'to-do-list', pathMatch: 'full' }, { path: 'address-book', component: AddressBookComponent }, { path: 'calendar', component: CalendarComponent }, { path: 'file', component: FileComponent }, { path: 'leave', component: LeaveComponent }, { path: 'logbook', component: LogbookComponent }, { path: 'reimburse', component: ReimburseComponent }, { path: 'to-do-list', component: ToDoListComponent } ];
export const employeeRouter = routes;
|
接下來將 employeeRouter 變數指派回 src\app\home\home-routing.module.ts
的 children
屬性。
home-routing.module.ts1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
| import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router'; import { HomeComponent } from './home.component'; import { employeeRouter } from '../employee/employee.routing';
const routes: Routes = [ { path: 'home', component: HomeComponent, children: employeeRouter } ];
@NgModule({ imports: [RouterModule.forChild(routes)], exports: [RouterModule] }) export class HomeRoutingModule { }
|
觀看執行結果其實感覺不出差異,但是對於系統維護上來說會更加便利。
[**first-app_2017-09-04.zip**](/uploads/first-app_2017-09-04.zip)