react-hook-form/src/logic/generateId.ts

export default () => {
  if (typeof crypto !== 'undefined' && crypto.randomUUID) {
    return crypto.randomUUID();
  }

  const d =
    typeof performance === 'undefined' ? Date.now() : performance.now() * 1000;

  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
    const r = (Math.random() * 16 + d) % 16 | 0;

    return (c == 'x' ? r : (r & 0x3) | 0x8).toString(16);
  });
};