12345678910111213141516171819202122232425262728
export async function encrypt(str: string, secret: string) {  const iv = crypto.getRandomValues(new Uint8Array(12))
  , ivString = Array.from(iv).map(byte => String.fromCharCode(byte)).join('')
  , algorithm = { name: 'AES-GCM', iv }
  , key = await crypto.subtle.importKey(    'raw',    await crypto.subtle.digest('SHA-256', new TextEncoder().encode(secret)),    algorithm,    false,    ['encrypt']  )
  , cipherBuffer = await crypto.subtle.encrypt(    algorithm,    key,    new TextEncoder().encode(str)  )
  , cipherArray = Array.from(new Uint8Array(cipherBuffer))
  , cipherString = cipherArray.map(byte => String.fromCharCode(byte)).join('')
  return btoa(ivString + cipherString)}