var crypto = require('crypto'); type Props = { password: string; salt: string; callback: () => void; }; export const HashPassword: React.FC => { crypto.pbkdf2(password, salt, 100000, 64, 'sha512', (err: string, derivedKey: string) => { if (err) throw err; // Printing the derived key callback(derivedKey.toString('hex')); }); }