element-tree 展开符号文字描述，样式修改

效果图，把下三角改为“展开“ ‘’收起‘’，增加边框


要点：把左侧三角符号的显示挪到右侧，去除转换方向，icon变为文字。
实现效果主要是css，其他根据官网代码来实现

/*树形图*/
.el-tree {
  .el-checkbox__input.is-checked .el-checkbox__inner, .el-checkbox__input.is-indeterminate .el-checkbox__inner {
    background-color: #06CCC5;
    border-color: #06CCC5;
  }
  .el-tree-node__expand-icon.expanded {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  .el-tree-node__expand-icon {

  }
  .el-icon-caret-right:before {
    content: '展开';
    display: block;
    width: 100% !important;
    height: 14px;
    font-size: 14px;
    font-family: NotoSansHans-Regular;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
    position: absolute;
    right: -395px;
    top: -0px;
  }
  .el-tree-node__expand-icon.expanded.el-icon-caret-right:before {
    content: '收起';
    display: block;
    width: 100% !important;
    height: 14px;
    font-size: 14px;
    font-family: NotoSansHans-Regular;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);;
  }
  .el-tree-node__expand-icon.is-leaf::before {
    display: none;
  }
  .el-tree-node__children {
    .el-tree-node__content {
      padding-left: 0 !important;
      margin-left: 36px;
      position: relative;

      .el-icon-caret-right:before {
        position: absolute;
        right: -360px;
        top: -0px;
      }

    }
    .el-tree-node__children {
      padding-left: 0 !important;
      margin-left: 36px;
    }
  }
  .el-tree-node__content {
    margin-top: 8px;
    height: 46px;
    border: 1px solid rgba(210, 210, 210, 1);
    border-radius: 4px;
    .el-tree-node__label {
      padding: 8px 0;
      width: 100% !important;

      border-radius: 4px;
    }
  }

}