Hmac sha-256 hexadecimal on webcrypto

hmac256.js

const ALGORITHM = {
  name: 'HMAC',
  hash: 'SHA-256'
}

const bufferToHex = (buffer) => (
  [...new Uint8Array(buffer)]
    .map(b => b.toString(16).padStart(2, '0'))
    .join('')
)

const hmac256 = async (secret, data) => {
  const enc = new TextEncoder('utf-8')
  const key = await crypto.subtle.importKey('raw', enc.encode(secret), ALGORITHM, false, ['sign', 'verify'])
  const signature = await crypto.subtle.sign(ALGORITHM.name, key, enc.encode(data))
  return bufferToHex(signature)
}

export default hmac256