How to get the public key from a keystore private key in JavaScript

getPublicKey.js

/* Example of how to obtain the public key through
 * a private key using a keystore
 */

/* Requires needed. You have to install the following
 * packages
 * npm install [email protected] [email protected]
 */
const Wallet = require('ethereumjs-wallet')
const keythereum = require('keythereum')
const fs = require('fs')

// Account's password. 
const password = "Passw0rd" // Add the account password if needed

// Load keystores
let keyData = fs.readFileSync('./keystore.json')
let keystoreData = JSON.parse(keyData)

// Obtain the private key account1 from the keystore
let account1PrivK
try{
	account1PrivK = keythereum.recover(Buffer.from(password), keystoreData) 
}catch(error){
	console.log("ERROR: ", error)
}

// Get the public key
let account1Puk = Wallet.default.fromPrivateKey(account1PrivK)
console.log("Public key:", account1Puk.getPublicKeyString(),"\n")

keystore.json

{
    "address": "6e3976aeaa3a59e4af51783cc46ee0ffabc5dc11",
    "crypto": {
      "cipher": "aes-128-ctr",
      "ciphertext": "463a0bc2146023ac4b85f4e3675c338facb0a09c4f83f5f067e2d36c87a0c35e",
      "cipherparams": {
        "iv": "d731f9793e33b3574303a863c7e68520"
      },
      "kdf": "scrypt",
      "kdfparams": {
        "dklen": 32,
        "n": 262144,
        "p": 1,
        "r": 8,
        "salt": "876f3ca79af1ec9b77f181cbefc45a2f392cb8eb99fe8b3a19c79d62e12ed173"
      },
      "mac": "230bf3451a7057ae6cf77399e6530a88d60a8f27f4089cf0c07319f1bf9844b3"
    },
    "id": "9277b6ec-6c04-4356-9e1c-dee015f459c5",
    "version": 3
  }