SHA256

sha256

function sha256(message, cb) {
  var encoder = new TextEncoder()
  var data = encoder.encode(message)
  crypto.subtle.digest('SHA-256', data).then(function(hash) {
    var hashArray = Array.from(new Uint8Array(hash))
    hashArray.forEach(function(b, i) {
      hashArray[i] = hashArray[i].toString(16).padStart(2, '0')
    })
    cb(hashArray.join(''))
  }).catch(function(err) {
    console.log(new Error(err))
  })
}

// USAGE
sha256('teste', function(hash) {
  console.log(hash)
})