vue3 基于el-tree增加、删除节点（非TypeScript 写法）

话不多说，直接贴代码

<template><div class="custom-tree-container"><!-- <p>Using render-content</p><el-tree style="max-width: 600px" :data="dataSource" show-checkbox node-key="id" default-expand-all:expand-on-click-node="false" :render-content="renderContent" /> --><p>Using scoped slot</p><el-tree style="max-width: 600px" :data="dataSource" show-checkbox node-key="id" default-expand-all:expand-on-click-node="false"><template #default="{ node, data }"><span class="custom-tree-node"><span>{{ node.label }}</span><span><a @click="append(data)"> Append </a><a style="margin-left: 8px" @click="remove(node, data)"> Delete </a></span></span></template></el-tree></div>
</template><script>
import { reactive, ref, toRefs } from 'vue'
// import {Node} from 'element-plus/es/components/tree/src/model/node'export default {name: 'part',setup() {const state = reactive({dataSource: [{id: 1,label: 'Level one 1',children: [{id: 4,label: 'Level two 1-1',children: [{id: 9,label: 'Level three 1-1-1'}]}]}]})const append = (data) => {let treeNodeId = data.$treeNodeId;console.info(data)// alert('当前id'+data.id)// alert(data.$treeNodeId)let id =data.id*100+1const newChild = { id: id, label: data.label+'-'+id, children: [] };if (!data.children) {data.children = [];}data.children.push(newChild);// state.dataSource = [data];}const remove = (node, data) => {const parent = node.parent;const children = parent.data.children || parent.data;const index = children.findIndex(d => d.id === data.id);children.splice(index, 1);// dataSource.value = [...dataSource.value];};return {...toRefs(state),append,remove}}
}</script><style>
.custom-tree-node {flex: 1;display: flex;align-items: center;justify-content: space-between;font-size: 14px;padding-right: 8px;
}
</style>

效果如下