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ant-design-vue/components/cascader/demo/default-value.md

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<cn>
#### 默认值
默认值通过数组的方式指定。
</cn>
<us>
#### Default value
Specifies default value by an array.
</us>
```html
<template>
<a-cascader :options="options" @change="onChange" :defaultValue="['zhejiang', 'hangzhou', 'xihu']" />
</template>
<script>
export default {
data() {
return {
options: [{
value: 'zhejiang',
label: 'Zhejiang',
children: [{
value: 'hangzhou',
label: 'Hangzhou',
children: [{
value: 'xihu',
label: 'West Lake',
}],
}],
}, {
value: 'jiangsu',
label: 'Jiangsu',
children: [{
value: 'nanjing',
label: 'Nanjing',
children: [{
value: 'zhonghuamen',
label: 'Zhong Hua Men',
}],
}],
}]
}
},
methods: {
onChange(value) {
console.log(value);
}
}
}
</script>
```