基于angular实现树形二级表格

  <div class="userContent_content">    <div>      <table>        <tr>          <td>节点名称</td>          <td>节点管理IP</td>          <td>节点登录名</td>           <td>节点登录密码</td>         </tr>        //使用ng-container作为空标签用于辅助放置for或者if事件，它在审查元素中是找不到的        <ng-container *ngFor="let item of currentTotalList,let i = index">          <tr>            <td style="color: #04AEB4;cursor: pointer;" class="img">              <div>                <div>{{item.name}}</div>                <div>        //下面是箭头的图片，是展开和收起箭头的切换，通过判断当前点击索引与列表索引是否相等，相等则展开，否则收起                  <img (click)="clickShowChildList(i,item.name)"                    [attr.src]="i == currentClickOpenIndex?'../../assets/resource/img/bottom.png':'../../assets/resource/img/right.png'">                </div>              </div>            </td>            <td>{{item.ip}}</td>            <td>{{item.username}}</td>            <td>{{item.password}}</td>          </tr>        //再次使用ng-container标签嵌套表格的子级          <ng-container *ngFor="let childItem of item.nodeList, let j = index">        //由于在同一个标签内，for循环和if判断不能同时共存，因此我们的隐藏事件if放置tr标签内，通过判断当前点击的索引与列表索引是否一致，相等则收起，不等则显示的功能。             <tr *ngIf="i == currentClickOpenIndex">              <td style="color: #04AEB4;cursor: pointer;" class="img">                <div>                  <div>                    {{childItem.masterIp}}</div>                </div>              </td>              <td>{{childItem.ip}}</td>              <td>{{childItem.username}}</td>              <td>{{childItem.password}}</td>            </tr>          </ng-container>        </ng-container>       </table>    </div>      </div>

      .userContent_content{        width: 100%;        height: calc(~"100% - 60px");        overflow: auto;        >div:nth-child(1){          >table{            width: 100%;            tr{              td{                width: 25%;                text-align: center;                font-size: 14px;                color: #fff;                padding: 16px 0px;                box-shadow: 0 1px #333;              }            }            .img {              >div {                width: 100%;                display: flex;                position: relative;                  >div:nth-child(1) {                  width: 85%;                  white-space: nowrap;                  text-overflow: ellipsis;                  -o-text-overflow: ellipsis;                  overflow: hidden;                  margin: 0 auto;                  }              }                img {                height: 10px !important;                width: 10px !important;                margin-left: 0 !important;                position: absolute;                right: 0;                top: 3px;              }            }          }        }          >div:nth-child(2){          height: 80px;          width: 90%;          display: flex;          align-items: center;          margin: 0 auto;          justify-content: flex-end;          #page{            display: table;          }        }      }

  clickShowChildList = (i,item)=>{    console.log(i,this.currentClickOpenIndex)    if(this.currentClickOpenIndex==i){      this.currentClickOpenIndex = -1    }else{      this.currentClickOpenIndex = i    }  }