48 lines
1.0 KiB
Markdown
48 lines
1.0 KiB
Markdown
<cn>
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#### 异步数据加载
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点击展开节点，动态加载数据。
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</cn>
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<us>
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#### load data asynchronously
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To load data asynchronously when click to expand a treeNode.
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</us>
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```tpl
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<template>
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<a-tree :loadData="onLoadData" :treeData="treeData" />
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</template>
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<script>
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export default {
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data() {
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return {
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treeData: [
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{ title: 'Expand to load', key: '0' },
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{ title: 'Expand to load', key: '1' },
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{ title: 'Tree Node', key: '2', isLeaf: true },
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],
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};
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},
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methods: {
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onLoadData(treeNode) {
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return new Promise(resolve => {
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if (treeNode.dataRef.children) {
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resolve();
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return;
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}
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setTimeout(() => {
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treeNode.dataRef.children = [
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{ title: 'Child Node', key: `${treeNode.eventKey}-0` },
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{ title: 'Child Node', key: `${treeNode.eventKey}-1` },
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];
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this.treeData = [...this.treeData];
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resolve();
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}, 1000);
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});
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},
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},
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};
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</script>
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```
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