2. <el-table  
    3.   ref="table" 
    4.   row-key="id"  
    5.    lazy  
    6.   :load="load"  
    7.   :tree-props="{children: 'children', hasChildren: 'hasChildren'}" 
    8. >
    10. loadTrees: Map<number, any> = new Map()  // 存储已经加载的树
    12. async load(tree:any, treeNode: any, resolve: any) {
    13.   this.loadTrees.set(tree.id, { tree, treeNode, resolve });
    14.   // 请求
    15.   const { data } = ajax()
    16.   resolve(data)
    17. }
    19. handleDelete({ id }: {id: number}){
    20.   const { tree, treeNode, resolve } = this.loadTrees.get(id)
    21.   this.load(tree , treeNode, resolve)
    22. }
    24. // use: update, delete, increase