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Aleksey exec
Asked:2020-07-25 23:52:13 +0000 UTC2020-07-25 23:52:13 +0000 UTC

如何模拟路由器延迟

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<nav routerLink="" class="pages__link"> 怎么模拟路由器点击的延迟以及进入多少秒，甚至从点击到页面加载做某种回调，这样我就可以放一个应用，写一些样式

app.component.html

<header class="df jcc aic">
  <nav class="page df jcc aic">
      <nav routerLink="" class="pages__link">{{ 'home' | uppercase }}</nav>
      <nav routerLink="about" class="pages__link">{{ 'about' | uppercase }}</nav>
      <nav routerLink="galery" class="pages__link">{{ 'galery' | uppercase }}</nav>
  </nav>
</header>
 <div class="container" [@fadeAnimation]="o.isActivated ? o.activatedRoute : ''">
   <router-outlet #o="outlet"></router-outlet>
 </div>

应用程序路由.module.ts

export const routes: Routes = [
        { path: '', component: HomeComponent },
        { path: 'about', component: AboutComponent },
        { path: 'galery', component: GaleryComponent }
    ];
маршрутизация

1 个回答

  1. Best Answer

    有几个选项，挂起click EventListener和延迟之一：

    <nav (click)="go('/')" class="pages__link">{{ 'home' | uppercase }}</nav>
<nav (click)="go('/about')" class="pages__link">{{ 'about' | uppercase }}</nav>
<nav (click)="go('/gallery', 2000)" class="pages__link">{{ 'galery' | uppercase }}</nav>

    在组件中：

    private defaultDelay = 1000;

constructor(private router: Router) {}

public go(url: string, delay?: number): void {
    setTimeout(() => {
        this.router.navigateByUrl(url);
    }, delay ? delay : this.defaultDelay);
}

    第二种选择是使用解析器：

    // delay.resolver.ts
import { Injectable } from '@angular/core';
import { Resolve } from '@angular/router';

import { Observable } from 'rxjs/Observable';
import { of } from 'rxjs/observable/of';
import { delay } from 'rxjs/operators/delay';

@Injectable()
export class DelayResolver implements Resolve<null> {
    private delay = 1000;

    public resolve(): Observable<null> {
        return of(null).pipe(delay(this.delay));
    }
}

    由于这是一个提供者，我们在注入器的模块中注册它：

    // app.module.ts
import { AppRouterModule } from './app.router.module';

import { DelayResolver } from './delay.resolver';

@NgModule({
    imports: [
        ...,
        AppRouterModule
    ],
    declarations: [...],
    providers: [
        DelayResolver
    ],
    bootstrap: [AppComponent]
})
export class AppModule {}

    同理，我们在路由模块中指定解析器：

    // app.router.module.ts
import { ModuleWithProviders } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { DelayResolver } from './delay.resolver';

const routes: Routes = [{
    path: '',
    component: HomeComponent,
    resolve: [DelayResolver]
}, {
    path: 'about',
    component: AboutComponent,
    resolve: [DelayResolver]
}];

export const AppRouterModule: ModuleWithProviders = RouterModule.forRoot(routes);

    Resolver也就是所谓的data provider，总之它是一个单例，在组件被初始化之前在路由器的某个生命周期钩子上做“一些事情”，但是在这种情况下它只是在组件初始化之前延迟了1000ms。

    • 1

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