76 lines
1.7 KiB
Vue
76 lines
1.7 KiB
Vue
<docs>
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---
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order: 5
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title:
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zh-CN: 异步加载
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en-US: Asynchronous loading
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---
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## zh-CN
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异步加载树节点。
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## en-US
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Asynchronous loading tree node.
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</docs>
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<template>
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<a-tree-select
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v-model:value="value"
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tree-data-simple-mode
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style="width: 100%"
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:dropdown-style="{ maxHeight: '400px', overflow: 'auto' }"
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:tree-data="treeData"
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placeholder="Please select"
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:load-data="onLoadData"
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/>
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</template>
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<script lang="ts">
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import type { TreeSelectProps } from 'ant-design-vue';
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import { defineComponent, ref, watch } from 'vue';
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export default defineComponent({
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setup() {
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const value = ref<string>();
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const treeData = ref<TreeSelectProps['treeData']>([
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{ id: 1, pId: 0, value: '1', title: 'Expand to load' },
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{ id: 2, pId: 0, value: '2', title: 'Expand to load' },
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{ id: 3, pId: 0, value: '3', title: 'Tree Node', isLeaf: true },
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]);
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watch(value, () => {
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console.log(value.value);
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});
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const genTreeNode = (parentId: number, isLeaf = false): TreeSelectProps['treeData'][number] => {
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const random = Math.random().toString(36).substring(2, 6);
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return {
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id: random,
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pId: parentId,
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value: random,
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title: isLeaf ? 'Tree Node' : 'Expand to load',
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isLeaf,
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};
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};
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const onLoadData = (treeNode: TreeSelectProps['treeData'][number]) => {
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return new Promise(resolve => {
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const { id } = treeNode.dataRef;
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setTimeout(() => {
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treeData.value = treeData.value.concat([genTreeNode(id, false), genTreeNode(id, true)]);
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console.log(treeData.value);
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resolve(true);
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}, 300);
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});
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};
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return {
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value,
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treeData,
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genTreeNode,
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onLoadData,
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};
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},
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});
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</script>
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