• el-tree 每个节点左右布局
• 鼠标经过接电视，左边文字变色，右边不变

<el-tree
        :data="list"
        :props="defaultProps"
        default-expand-all
        :expand-on-click-node="false"
      >
        <template #default="{ data }">
          <el-row
            style="width: 100%; height: 40px"
            type="flex"
            align="middle"
            justify="space-between"
          >
            <el-col :span="16">{{ data.name }}</el-col>
            <el-col :span="6" class="right">
              <span>{{ data.managerName }}</span>
              <el-dropdown @command="operateDept($event,data.id)">
                <span class="el-dropdown-link">
                  操作
                  <i class="el-icon-arrow-down el-icon--right" />
                </span>
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item command="add">添加子部门</el-dropdown-item>
                  <el-dropdown-item command="edit">编辑部门</el-dropdown-item>
                  <el-dropdown-item command="del">删除</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
            </el-col>
          </el-row>
        </template>
      </el-tree>

.el-tree {
    ::v-deep .el-tree-node__content {
      width: 100%;
      height: 40px;
      &:hover {
        color: blue;
      }
    }
    .el-row {
      .right {
        width: 200px;
        display: flex;
        justify-content: space-between;
      }
    }
  }