Angular 5每次单击路线时滚动到顶部 [英] Angular 5 Scroll to top on every Route click

问题描述

我正在使用angular5.我有一个仪表板，其中的几个部分内容很少，而几个部分内容太大，以至于在转到顶部时更改路由器时都遇到了问题.每次我需要滚动到顶部时.谁能帮助我解决此问题，以便在我更换路由器时，我的看法始终停留在顶部.

I am using angular 5. I have a dashboard where I have few sections with small content and few sections with so large content that I am facing a problem when changing router while going to top. Every time I need to scroll to go to top. Can anyone help me to solve this issue so that when I change the router my view always stay at the top.

谢谢.

推荐答案

有一些解决方案，请务必全部检查:)

There some solutions, make sure to check them all :)

每当实例化一个新组件时，路由器插座就会发出activate事件，因此我们可以使用(activate)滚动(例如)到顶部:

The router outlet will emit the activate event any time a new component is being instantiated, so we could use (activate) to scroll (for example) to the top:

app.component.html

<router-outlet (activate)="onActivate($event)" ></router-outlet>

app.component.ts

onActivate(event) {
    window.scroll(0,0);
    //or document.body.scrollTop = 0;
    //or document.querySelector('body').scrollTo(0,0)
    ...
}

或使用此答案以平滑滚动

    onActivate(event) {
        let scrollToTop = window.setInterval(() => {
            let pos = window.pageYOffset;
            if (pos > 0) {
                window.scrollTo(0, pos - 20); // how far to scroll on each step
            } else {
                window.clearInterval(scrollToTop);
            }
        }, 16);
    }

---

如果您希望有所选择，说不是每个组件都应触发滚动，则可以进行检查:

---

If you wish to be selective, say not every component should trigger the scrolling, you can check it:

onActivate(e) {
    if (e.constructor.name)==="login"{ // for example
            window.scroll(0,0);
    }
}

---

从Angular6.1开始，我们还可以在热切加载的模块上使用{ scrollPositionRestoration: 'enabled' }，它将应用于所有路由:

---

Since Angular6.1, we can also use { scrollPositionRestoration: 'enabled' } on eagerly loaded modules and it will be applied to all routes:

RouterModule.forRoot(appRoutes, { scrollPositionRestoration: 'enabled' })

它还将进行平滑滚动.然而，这在每个路由上都具有不便之处.

---

另一种解决方案是对路由器动画进行顶部滚动.在您要滚动到顶部的每个过渡中添加此代码:

It will also do the smooth scrolling. However this has the inconvenient for doing it on every routing.

---

An other solution is to do the top scrolling on router animation. Add this in every transition where you want to scroll to the top:

query(':enter, :leave', style({ position: 'fixed' }), { optional: true }),

这篇关于Angular 5每次单击路线时滚动到顶部的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！