在我的Angular 2应用中,当我向下滚动页面并单击页面底部的链接时,它确实会改变路由并将我带到下一页,但它不会滚动到页面顶部。因此,如果第一页很长,第二页内容很少,就会给人一种第二页缺乏内容的印象。因为只有当用户滚动到页面顶部时,内容才可见。

我可以滚动窗口到ngInit组件的页面顶部,但是,有没有更好的解决方案,可以自动处理我的应用程序中的所有路由?


当前回答

只需点击动作就可以轻松完成

在你的主组件html引用#scrollContainer

<div class="main-container" #scrollContainer>
    <router-outlet (activate)="onActivate($event, scrollContainer)"></router-outlet>
</div>

在主组件.ts中

onActivate(e, scrollContainer) {
    scrollContainer.scrollTop = 0;
}

其他回答

Here's a solution that I've come up with. I paired up the LocationStrategy with the Router events. Using the LocationStrategy to set a boolean to know when a user's currently traversing through the browser history. This way, I don't have to store a bunch of URL and y-scroll data (which doesn't work well anyway, since each data is replaced based on URL). This also solves the edge case when a user decides to hold the back or forward button on a browser and goes back or forward multiple pages rather than just one.

附注:我只测试了最新版本的IE、Chrome、FireFox、Safari和Opera(截至本文)。

希望这能有所帮助。

export class AppComponent implements OnInit {
  isPopState = false;

  constructor(private router: Router, private locStrat: LocationStrategy) { }

  ngOnInit(): void {
    this.locStrat.onPopState(() => {
      this.isPopState = true;
    });

    this.router.events.subscribe(event => {
      // Scroll to top if accessing a page, not via browser history stack
      if (event instanceof NavigationEnd && !this.isPopState) {
        window.scrollTo(0, 0);
        this.isPopState = false;
      }

      // Ensures that isPopState is reset
      if (event instanceof NavigationEnd) {
        this.isPopState = false;
      }
    });
  }
}

您可以在主组件上注册路由更改侦听器,并在路由更改时滚动到顶部。

import { Component, OnInit } from '@angular/core';
import { Router, NavigationEnd } from '@angular/router';

@Component({
    selector: 'my-app',
    template: '<ng-content></ng-content>',
})
export class MyAppComponent implements OnInit {
    constructor(private router: Router) { }

    ngOnInit() {
        this.router.events.subscribe((evt) => {
            if (!(evt instanceof NavigationEnd)) {
                return;
            }
            window.scrollTo(0, 0)
        });
    }
}

对于iphone/ios safari,您可以使用setTimeout进行包装

setTimeout(function(){
    window.scrollTo(0, 1);
}, 0);

这对我来说最适合所有导航更改,包括哈希导航

constructor(private route: ActivatedRoute) {}

ngOnInit() {
  this._sub = this.route.fragment.subscribe((hash: string) => {
    if (hash) {
      const cmp = document.getElementById(hash);
      if (cmp) {
        cmp.scrollIntoView();
      }
    } else {
      window.scrollTo(0, 0);
    }
  });
}

从Angular 6.1开始,路由器提供了一个名为scrollPositionRestoration的配置选项,这是为了满足这种情况而设计的。

imports: [
  RouterModule.forRoot(routes, {
    scrollPositionRestoration: 'enabled'
  }),
  ...
]