Angular5 -获取指令/组件到顶部和左侧的距离

import { Component, ElementRef, Renderer2 } from '@angular/core';

constructor(private elementRef: ElementRef, private renderer: Renderer2) { }

getTopDistance() {
  const element = this.elementRef.nativeElement;
  const topDistance = element.offsetTop;
  return topDistance;
}

getLeftDistance() {
  const element = this.elementRef.nativeElement;
  const leftDistance = element.offsetLeft;
  return leftDistance;
}