【elementui】记录解决el-tree开启show-checkbox后，勾选一个叶结点后会自动折叠的现象

第一种解决方案：设置default-expand-keys的值为当前选中的key值即可

<el-tree
  ref="tree"
  class="checkboxSelect-wrap"
  :data="treeData"
  show-checkbox
  node-key="id"
  :expand-on-click-node="true"
  :props="defaultProps"
  :accordion="false"
  :default-checked-keys="defaultCheckedKeys"
  :default-expand-keys="defaultExpandKeys"
  :default-expand-all="false"
  @node-click="handleNodeClick"
  @check="handleCheckChange"
>