ant-design-vue/components/cascader/demo/suffix.md

#### 后缀图标 省市区级联。 #### Suffix Cascade selection box for selecting province/city/district.

<template>
  <div>
    <a-cascader style="margin-top: 1rem" :options="options" @change="onChange" placeholder="Please select">
      <a-icon type="smile" slot="suffixIcon" class="test"/>
    </a-cascader>
    <a-cascader suffixIcon="ab" style="margin-top: 1rem" :options="options" @change="onChange" placeholder="Please select" />
  </div>
</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>