ant-design/components/select/demo/variant.tsx

import React from 'react';
import { Flex, Select } from 'antd';

const App: React.FC = () => (
  <Flex gap={12} vertical>
    <Flex gap={8}>
      <Select
        placeholder="Outlined"
        style={{ flex: 1 }}
        options={[
          { value: 'jack', label: 'Jack' },
          { value: 'lucy', label: 'Lucy' },
          { value: 'Yiminghe', label: 'yiminghe' },
        ]}
      />
      <Select
        mode="multiple"
        defaultValue={['lucy']}
        placeholder="Outlined"
        style={{ flex: 1 }}
        options={[
          { value: 'jack', label: 'Jack' },
          { value: 'lucy', label: 'Lucy' },
          { value: 'Yiminghe', label: 'yiminghe' },
        ]}
      />
    </Flex>
    <Flex gap={8}>
      <Select
        placeholder="Filled"
        variant="filled"
        style={{ flex: 1 }}
        options={[
          { value: 'jack', label: 'Jack' },
          { value: 'lucy', label: 'Lucy' },
          { value: 'Yiminghe', label: 'yiminghe' },
        ]}
      />
      <Select
        mode="multiple"
        defaultValue={['lucy']}
        placeholder="Filled"
        variant="filled"
        style={{ flex: 1 }}
        options={[
          { value: 'jack', label: 'Jack' },
          { value: 'lucy', label: 'Lucy' },
          { value: 'Yiminghe', label: 'yiminghe' },
        ]}
      />
    </Flex>
    <Flex gap={8}>
      <Select
        placeholder="Borderless"
        variant="borderless"
        style={{ flex: 1 }}
        options={[
          { value: 'jack', label: 'Jack' },
          { value: 'lucy', label: 'Lucy' },
          { value: 'Yiminghe', label: 'yiminghe' },
        ]}
      />
      <Select
        mode="multiple"
        defaultValue={['lucy']}
        placeholder="Borderless"
        variant="borderless"
        style={{ flex: 1 }}
        options={[
          { value: 'jack', label: 'Jack' },
          { value: 'lucy', label: 'Lucy' },
          { value: 'Yiminghe', label: 'yiminghe' },
        ]}
      />
    </Flex>
  </Flex>
);

export default App;