JWT Token Decode Header and Payload to JSON

jwt-decode.ts

export default function jwtDecode(token: any) {
  const base64Urls = token.split('.');
  base64Urls.map( (url: string, i: number) => {
    if(i<2)
      base64Urls[i].replace(/-/g, '+').replace(/_/g, '/');
  });

  const jwtHeader = JSON.parse(Buffer.from(base64Urls[0], 'base64').toString());
  const jwtPayload = JSON.parse(Buffer.from(base64Urls[1], 'base64').toString());


  return [
    jwtHeader,
    jwtPayload
  ]
}