crypt.js

var crypto = require("crypto");
var algorithm = "aes-192-cbc";
var password = "Store this password in a .env file!";
const key = crypto.scryptSync(password, 'salt', 24);

var text =  "secret message";

const iv = crypto.randomBytes(16); // different each time

const cipher = crypto.createCipheriv(algorithm, key, iv);
var encrypted = cipher.update(text, 'utf8', 'hex') + cipher.final('hex');

console.log(encrypted);

const decipher = crypto.createDecipheriv(algorithm, key, iv);
var decrypted = decipher.update(encrypted, 'hex', 'utf8') + decipher.final('utf8');

console.log(decrypted);