claude-code/packages/@ant/ink/src/theme/Spinner.tsx

import React, { useState, useEffect } from 'react';
import { Text } from '../index.js';

const FRAMES = ['⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧', '⠇', '⠏'];

/**
 * A simple animated spinner for loading states.
 */
export function Spinner(): React.ReactNode {
  const [frame, setFrame] = useState(0);

  useEffect(() => {
    const timer = setInterval(() => {
      setFrame(f => (f + 1) % FRAMES.length);
    }, 80);
    return () => clearInterval(timer);
  }, []);

  return <Text>{FRAMES[frame]}</Text>;
}