Angular刷新当前页面的方法介绍（附示例）

onSameUrlNavigation

??从angular5.1起提供onSameUrlNavigation来支持路由重新加载。、

??有两个值'reload'和'ignore'。默认为'ignore'

??定义当路由器收到一个导航到当前 URL 的请求时应该怎么做。 默认情况下，路由器将会忽略这次导航。但这样会阻止类似于 "刷新" 按钮的特性。 使用该选项可以配置导航到当前 URL 时的行为。

使用

配置onSameUrlNavigation

@NgModule({
 imports: [RouterModule.forRoot(
 routes,
 { onSameUrlNavigation: 'reload' }
 )],
 exports: [RouterModule]
})

??reload实际上不会重新加载路由，只是重新出发挂载在路由器上的事件。

配置runGuardsAndResolvers

??runGuardsAndResolvers有三个值：

const routes: Routes = [
 {
 path: '',
 children: [
 { path: 'report-list', component: ReportListComponent },
 { path: 'detail/:id', component: ReportDetailComponent, runGuardsAndResolvers: 'always' },
 { path: '', redirectTo: 'report-list', pathMatch: 'full' }
 ]
 }
];

组件监听router.events

import {Component, OnDestroy, OnInit} from '@angular/core';
import {Observable} from 'rxjs';
import {Report} from '@models/report';
import {ReportService} from '@services/report.service';
import {ActivatedRoute, NavigationEnd, Router} from '@angular/router';

@Component({
 selector: 'app-report-detail',
 templateUrl: './report-detail.component.html',
 styleUrls: ['./report-detail.component.scss']
})
export class ReportDetailComponent implements OnInit, OnDestroy {
 report$: Observable<Report>;
 navigationSubscription;

 constructor(
 private reportService: ReportService,
 private router: Router,
 private route: ActivatedRoute
 ) {
 this.navigationSubscription = this.router.events.subscribe((event: any) => {
 if (event instanceof NavigationEnd) {
 this.initLoad(event);
 }
 });
 }

 ngOnInit() {
 const id = +this.route.snapshot.paramMap.get('id');
 this.report$ = this.reportService.getReport(id);
 }

 ngOnDestroy(): void {
 // 销毁navigationSubscription，避免内存泄漏
 if (this.navigationSubscription) {
 this.navigationSubscription.unsubscribe();
 }
 }

 initLoad(e) {
 window.scrollTo(0, 0);
 console.log(e);
 }
}