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---
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order: 2
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title: 移入展开
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---
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通过移入展开下级菜单，点击完成选择。
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````jsx
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import { Cascader } from 'antd';
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const options = [{
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value: 'zhejiang',
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label: '浙江',
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children: [{
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value: 'hangzhou',
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label: '杭州',
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children: [{
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value: 'xihu',
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label: '西湖',
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}],
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}],
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}, {
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value: 'jiangsu',
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label: '江苏',
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children: [{
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value: 'nanjing',
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label: '南京',
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children: [{
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value: 'zhonghuamen',
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label: '中华门',
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}],
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}],
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}];
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function onChange(value) {
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console.log(value);
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}
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// 只展示最后一项
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function displayRender(label) {
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return label[label.length - 1];
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}
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ReactDOM.render(
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<Cascader options={options} expandTrigger="hover"
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displayRender={displayRender} onChange={onChange} />
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, mountNode);
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````
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