一、引用fromEvent
import { fromEvent } from 'rxjs';
二、调用fromEvent
this.subscribeScoll = fromEvent(window, 'scroll').subscribe((event) => {this.onWindowScroll();});onWindowScroll(){console.log(页面滚动了);}；
三、调用滚动函数
详细代码：
import { Component, OnInit } from '@angular/core';import { fromEvent } from 'rxjs'; //引入@Component({selector: 'app-heroes',templateUrl: './ponent.html',styleUrls: ['./ponent.css']})export class HeroesComponent implements OnInit {subscribeScoll:any;scrollDis:any = {_top:0}constructor() { }ngOnInit() {this.subscribeScoll = fromEvent(window, 'scroll').subscribe((event) => {this.onWindowScroll();//调用});}scollPostion() {var t, l, w, h;if (document.documentElement && document.documentElement.scrollTop) {t = document.documentElement.scrollTop;l = document.documentElement.scrollLeft;w = document.documentElement.scrollWidth;h = document.documentElement.scrollHeight;} else if (document.body) {t = document.body.scrollTop;l = document.body.scrollLeft;w = document.body.scrollWidth;h = document.body.scrollHeight;}return {top: t,left: l,width: w,height: h};}onWindowScroll(){this.scrollDis._top = this.scollPostion().top;console.log(this.scrollDis._top);}}
