ant-design/components/input/demo/advance-count.tsx

import React from 'react';
import { Flex, Input, Typography } from 'antd';
import { runes } from 'runes2';

const App: React.FC = () => (
  <Flex vertical gap={16}>
    <div>
      <Typography.Title level={5}>Exceed Max</Typography.Title>
      <Input
        count={{
          show: true,
          max: 10,
        }}
        defaultValue="Hello, antd!"
      />
    </div>

    <div>
      <Typography.Title level={5}>Emoji count as length 1</Typography.Title>
      <Input
        count={{
          show: true,
          strategy: (txt) => runes(txt).length,
        }}
        defaultValue="🔥🔥🔥"
      />
    </div>

    <div>
      <Typography.Title level={5}>Not exceed max</Typography.Title>
      <Input
        count={{
          show: true,
          max: 6,
          strategy: (txt) => runes(txt).length,
          exceedFormatter: (txt, { max }) => runes(txt).slice(0, max).join(''),
        }}
        defaultValue="🔥 antd"
      />
    </div>
  </Flex>
);

export default App;