element-ui tree 更新子树数据

<el-tree

ref="tree"

show-checkbox

check-strictly

lazy

accordion

node-key="id"

:load="loadNode"

:props="{isLeaf: 'leaf'}"

:expand-on-click-node="true"

:check-on-click-node="true"

>

</el-tree>

方法：

let keys = this.$refs.tree.getCheckedKeys() //取得当前选择的node-key

this.$refs.tree.updateKeyChildren(keys,treeData)//更新node-key的子节点