Angular实现表格自滚动效果

<div style="padding: 100px;">
    <div class="tableTitleRow">
        <div class="tabletTitle">Name</div>
        <div class="tabletTitle">Age</div>
        <div class="tabletTitle">Address</div>
    </div>
    <div id="parent" class="parent">
        <div id="child1" class="child">
            <div *ngFor="let data of listOfData;index as i">
                <div class="tableBodyRow">
                    <div class="tabletBody">{{i}}</div>
                    <div class="tabletBody">{{i+10}}</div>
                    <div class="tabletBody">{{i+100}}</div>
                </div>
            </div>
        </div>
        <div id="child2" class="child"></div>
    </div>
</div>

.Qbody {
  padding: 100px;
  // 表头层
  .tableTitleRow {
    display: flex;

    .tabletTitle {
      color: #ffffff;
      background-color: #1e6fff;
      height: 64px;
      font-size: 16px;
      flex: 1;
      justify-content: flex-start;
      text-align: center;
      line-height: 64px;
      border: 1px solid #ccc;
    }
  }
  //内容层
  .parent {
    height: 380px; //控制多高处出现滚动条
    margin: 0 auto;
    background: #242424;
    overflow-y: scroll;
    .child {
      /*设置的子盒子高度大于父盒子，产生溢出效果*/
      height: auto;
      div {
        .tableBodyRow {
          display: flex;
          .tabletBody {
            background: #ffffff;
            font-size: 16px;
            flex: 1;
            justify-content: flex-start;
            text-align: center;
            line-height: 64px;
            border: 1px solid #ccc;
            div {
              line-height: 30px;
              border-top: 1px solid #ccc;
              border-bottom: 1px solid #ccc;
            }
          }
        }
      }
    }
  }
}

 ngOnInit(): void {
    var parent = document.getElementById('parent');//获取Dom
    var child1 = document.getElementById('child1');//获取Dom
    var child2 = document.getElementById('child2');//获取Dom
    child2.innerHTML = child1.innerHTML;
    this.mysetInterval=setInterval(function () {
       if((parent.scrollTop++) == (parent.scrollTop)&&(parent.scrollTop!=0)) {
           parent.scrollTop = 0;
       } else {
           parent.scrollTop++;
       }
    }, 50);
  }
  mysetInterval//定时器名字
  ngOnDestroy() {//每当 Angular 每次销毁指令/组件之前调用并清扫
    clearInterval(this.mysetInterval)//关闭循环
  }