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