Angular文檔項目具有AutoScrollService服務。你可以嘗試使用它。 auto-scroll.service.ts
/**
* A service that supports automatically scrolling elements into view
*/
@Injectable()
export class AutoScrollService {
constructor(
@Inject(DOCUMENT) private document: any,
private location: PlatformLocation) { }
/**
* Scroll to the element with id extracted from the current location hash fragment
* Scroll to top if no hash
* Don't scroll if hash not found
*/
scroll() {
const hash = this.getCurrentHash();
const element: HTMLElement = hash
? this.document.getElementById(hash)
: this.document.getElementById('top-of-page') || this.document.body;
if (element) {
element.scrollIntoView();
if (window && window.scrollBy) { window.scrollBy(0, -80); }
}
}
/**
* We can get the hash fragment from the `PlatformLocation` but
* it needs the `#` char removing from the front.
*/
private getCurrentHash() {
return this.location.hash.replace(/^#/, '');
}
}