<el-tree 
	v-if="openPanel" 	//重加載
	:data="data" 		//樹形數(shù)據(jù)
	:props="defaultProps" 	
	node-key="id" 					//默認(rèn)展開節(jié)點
	:default-expanded-keys="[-1]" 	//默認(rèn)展開節(jié)點：-1
	@node-click="handleNodeClick">	//點擊事件	
</el-tree>	

data() {
	return {
		openPanel:true,
		data: [{
			id: -1,
			label: '儀表板',
			children: [
			]
		}],
		defaultProps: {
			children: 'children',
			label: 'label'
		}
	}
}

//先增加
this.doAdd(val);
//然后清空樹的數(shù)據(jù)
this.sup_this.data = [{
	id: -1,
	label: '儀表板',
	children: [
	
	]
}];
//在0.1s后重新查詢并加載樹
setTimeout(() => {
	//查詢樹的數(shù)據(jù)
	this.queryPanel();
	//<el-tree>組件使用v-if重新加載
	this.openPanel = false;
	this.sup_this.$nextTick(() => {
		this.openPanel = true;
	})
}, 100);

? ? ? let {
? ? ? ? updateKeyChildren,
? ? ? } = this.$refs.entityTreeRef;
? ? ??
? ? ? let res = await this.listChildrenNode(this.confTarget);
? ? ? updateKeyChildren(id, res);

let { nodesMap } = this.$refs.entityTreeRef.root.store;
let lastExpandIds = [];
let localMap = Object.values(nodesMap);
localMap.forEach(item => {
? if (item.expanded) {
? ? lastExpandIds.push(item.data.id);
? }
});
nodesMap = {};

nodesMap = {};

let { nodesMap } = this.$refs.entityTreeRef.root.store;
this.defaultExpandedKeys = ids;
this.$refs.entityTreeRef.root.setData(result);