Element tree control custom node content

Hello everyone, now there is a requirement: click the person in charge, the collaborator disappears. I use the custom control in element to write this function

<el-tree
  :props="addTasks.defaultProps"
  :load="loadNode"
  accordion
  lazy>
    <span class="custom-tree-node btn-none" slot-scope="    { node, data }">
    <span>{{ data.deptName }}</span>
    <span v-show="node.level === 2">
      <!-- 点击负责人 协作者消失 -->
      <!-- 点击协作者 负责人消失 -->
      <el-button
        type="text"
        size="mini"
        @click="() => onlyPeople(node, data)">
        +负责人
      </el-button>
      <el-button
        type="text"
        size="mini"
        v-show="addTasks.isCollaborators"
        @click="() => collaborators(data)">
        +协作者
      </el-button>  
    </span>
    </span>
</el-tree>

// 负责人
onlyPeople(node, data) {
  // TODO:
  const parent = node;
  console.log(parent, 'onlyPeople-node');
  console.log(data, 'onlyPeople-data');
  this.addTasks.isCollaborators = true;
},

If I write this in my method, I will hide all the BTNs under the child nodes of the same level. How can I realize that if I click a child node, the BTN under the child node will disappear?