Angular scrollPositionRestoration没有动画/平滑滚动？

import { Injectable } from '@angular/core';
import { Router, Scroll, ScrollBehavior } from '@angular/router';

@Injectable()
export class SmoothScrollRestoration implements ScrollBehavior {
  constructor(private router: Router) {}

  public shouldScroll = (position: Scroll): boolean => {
    return true;
  }

  public scrollToPosition = (position: Scroll): [number, number] => {
    const [x, y] = position.position;
    window.scrollTo({ top: y, left: x, behavior: 'smooth' });
    return [x, y];
  }

  public getScrollPosition = (): [number, number] => {
    return [window.scrollX, window.scrollY];
  }
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouterModule, Router, Scroll } from '@angular/router';
import { SmoothScrollRestoration } from './smooth-scroll-restoration';

@NgModule({
  imports: [BrowserModule, RouterModule.forRoot([])],
  providers: [
    {
      provide: Scroll,
      useClass: SmoothScrollRestoration,
      deps: [Router],
    },
  ],
})
export class AppModule {}