load(tree, treeNode, resolve){ this.$api.purchaseItemBom .treeLoad(tree.id) .then((res) => { resolve(res.data) }) .catch((err) => { this.$message.error(err.message) })}<el-table border header-cell-class-name="head-row" :data="pageResult.content" :height="tableHeight" :size="size" style="width:100%;" row-key="id" :row-class-name="tableRowClassName" @sort-change="sortChange" lazy :load="load" :tree-props="{children: 'children', hasChildren: 'hasChildren'}"就是每次点击加载子集的时候，页面要完全刷新一遍，有什么方法可以只刷新表格什么的么