59 lines
1.2 KiB
Markdown
59 lines
1.2 KiB
Markdown
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<cn>
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#### 动态加载选项
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使用 `loadData` 实现动态加载选项。
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> 注意：`loadData` 与 `showSearch` 无法一起使用。
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</cn>
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<us>
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#### Load Options Lazily
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Load options lazily with `loadData`.
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> Note: `loadData` cannot work with `showSearch`.
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</us>
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```html
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<template>
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<a-cascader :options="options" @change="onChange" :loadData="loadData" placeholder="Please select" changeOnSelect/>
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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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options: [{
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value: 'zhejiang',
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label: 'Zhejiang',
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isLeaf: false,
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}, {
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value: 'jiangsu',
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label: 'Jiangsu',
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isLeaf: false,
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}]
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}
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},
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methods: {
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onChange(value) {
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console.log(value);
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},
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loadData(selectedOptions) {
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const targetOption = selectedOptions[selectedOptions.length - 1];
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targetOption.loading = true;
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// load options lazily
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setTimeout(() => {
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targetOption.loading = false;
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targetOption.children = [{
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label: `${targetOption.label} Dynamic 1`,
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value: 'dynamic1',
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}, {
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label: `${targetOption.label} Dynamic 2`,
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value: 'dynamic2',
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}];
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this.options = [...this.options]
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}, 1000);
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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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