el-tree 多选限制选中个数

需求：
1、el-tree至多选10个，超过后无法再勾选
2、当勾选父节点时不自动勾选子节点；
3、点击清除，清除所有勾选项

 handleTreeCheck (currNode, checkedInfo) {
      let checkedKeys = checkedInfo.checkedKeys || [];
       let treeNodesMap = this.$refs.treeRef.store?.nodesMap || {};
       let status = checkedKeys.length >= 10
       if (status) {
           this.$message.warning('最多只能选择10个！')
       }
       Object.keys(treeNodesMap).forEach(key => {
           let item = treeNodesMap[key] || {};
           if (!checkedKeys.includes(key)) {
               let data = item.data || {};
               data.disabled = status;
               this.$refs.treeRef.setCurrentNode(data);
           }
       })
   }

  //清除
  clearTreeSelect() {
     this.$refs.treeRef.setCheckedKeys([]);
  }