Vxe UI vue vxe-table 虚拟树表格的使用，流畅的渲染万级数据树结构表格

代码

普通树表格，一般存数据库里都是平级数据，vxe-table 的树渲染这就非常友好了，只有带有父子id关联的数组，就可以自动渲染树表格。
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<template><div><vxe-grid v-bind="gridOptions"></vxe-grid></div>
</template><script setup>
import { reactive } from 'vue'
const gridOptions = reactive({border: true,treeConfig: {transform: true, // 开启自动转换，如果为 false 则需要传带有 children 的树结构rowField: 'id', // 行 keyparentField: 'parentId' // 父级行 key},columns: [{ type: 'seq', width: 70 },{ field: 'name', title: 'Name', minWidth: 300, treeNode: true },{ field: 'size', title: 'Size' },{ field: 'type', title: 'Type' },{ field: 'date', title: 'Date' }],data: [{ id: 10000, parentId: null, name: 'Test1', type: 'mp3', size: 1024, date: '2020-08-01' },{ id: 10050, parentId: null, name: 'Test2', type: 'mp4', size: 0, date: '2021-04-01' },{ id: 24300, parentId: 10050, name: 'Test3', type: 'avi', size: 1024, date: '2020-03-01' },{ id: 20045, parentId: 24300, name: 'Test4', type: 'html', size: 600, date: '2021-04-01' },{ id: 10053, parentId: 24300, name: 'Test5', type: 'avi', size: 0, date: '2021-04-01' },{ id: 24330, parentId: 10053, name: 'Test6', type: 'txt', size: 25, date: '2021-10-01' },{ id: 21011, parentId: 10053, name: 'Test7', type: 'pdf', size: 512, date: '2020-01-01' },{ id: 22200, parentId: 10053, name: 'Test8', type: 'js', size: 1024, date: '2021-06-01' },{ id: 23666, parentId: null, name: 'Test9', type: 'xlsx', size: 2048, date: '2020-11-01' },{ id: 23677, parentId: 23666, name: 'Test10', type: 'js', size: 1024, date: '2021-06-01' },{ id: 23671, parentId: 23677, name: 'Test11', type: 'js', size: 1024, date: '2021-06-01' },{ id: 23672, parentId: 23677, name: 'Test12', type: 'js', size: 1024, date: '2021-06-01' },{ id: 23688, parentId: 23666, name: 'Test13', type: 'js', size: 1024, date: '2021-06-01' },{ id: 23681, parentId: 23688, name: 'Test14', type: 'js', size: 1024, date: '2021-06-01' },{ id: 23682, parentId: 23688, name: 'Test15', type: 'js', size: 1024, date: '2021-06-01' },{ id: 24555, parentId: null, name: 'Test16', type: 'avi', size: 224, date: '2020-10-01' },{ id: 24566, parentId: 24555, name: 'Test17', type: 'js', size: 1024, date: '2021-06-01' },{ id: 24577, parentId: 24555, name: 'Test18', type: 'js', size: 1024, date: '2021-06-01' }]
})</script>

虚拟树表格

这是一个几千节点的树结构
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树结构几千节点和20列，渲染后操作非常流畅
不管是单个展开还是全部展开，操作都非常流畅

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<template><div><div><vxe-button @click="expandAllEvent">展开所有</vxe-button><vxe-button @click="clearExpandEvent">收起所有</vxe-button></div><vxe-grid ref="gridRef" v-bind="gridOptions"></vxe-grid></div>
</template><script setup>
import { ref, reactive } from 'vue'const gridRef = ref()const gridOptions = reactive({border: true,showOverflow: true,height: 800,loading: false,treeConfig: {transform: true},scrollY: {enabled: true,gt: 0},columns: [{ type: 'checkbox', width: 60 },{ type: 'seq', width: 300, treeNode: true },{ field: 'id', title: 'Id' },{ field: 'name', title: 'Name' }],data: []
})const loadList = () => {gridOptions.loading = truefetch('/resource/json/provinces_list.json').then(res => res.json()).then((data) => {gridOptions.data = datagridOptions.loading = false})
}const expandAllEvent = () => {const $grid = gridRef.valueif ($grid) {$grid.setAllTreeExpand(true)}
}const clearExpandEvent = () => {const $grid = gridRef.valueif ($grid) {$grid.clearTreeExpand()}
}
loadList()</script>