ant-design/components/tabs/demo/extra.tsx

import React, { useMemo, useState } from 'react';
import { Button, Checkbox, Divider, Tabs } from 'antd';

const CheckboxGroup = Checkbox.Group;

const operations = <Button>Extra Action</Button>;

const OperationsSlot: Record<PositionType, React.ReactNode> = {
  left: <Button className="tabs-extra-demo-button">Left Extra Action</Button>,
  right: <Button>Right Extra Action</Button>,
};

const options = ['left', 'right'];

type PositionType = 'left' | 'right';

const items = new Array(3).fill(null).map((_, i) => {
  const id = String(i + 1);
  return {
    label: `Tab ${id}`,
    key: id,
    children: `Content of tab ${id}`,
  };
});

const App: React.FC = () => {
  const [position, setPosition] = useState<PositionType[]>(['left', 'right']);

  const slot = useMemo(() => {
    if (position.length === 0) return null;

    return position.reduce(
      (acc, direction) => ({ ...acc, [direction]: OperationsSlot[direction] }),
      {},
    );
  }, [position]);

  return (
    <>
      <Tabs tabBarExtraContent={operations} items={items} />
      <br />
      <br />
      <br />
      <div>You can also specify its direction or both side</div>
      <Divider />
      <CheckboxGroup
        options={options}
        value={position}
        onChange={value => {
          setPosition(value as PositionType[]);
        }}
      />
      <br />
      <br />
      <Tabs tabBarExtraContent={slot} items={items} />
    </>
  );
};

export default App;