Using BCrypt to hash password in Node.js

using_bcrypt.js

//READ MORE IN THIS ARTICLE https://morioh.com/a/782c0022755e/using-bcrypt-to-hash-passwords-in-nodejs EXPECIALLY PRE-REQUISITE

const bcrypt = require("bcrypt")
const saltRounds = 10
const password = "Admin@123"

//Password encryption + explicit Salt
bcrypt
  .genSalt(saltRounds)
  .then(salt => {
    console.log('Salt: ', salt)   // Salt: $2b$10$t7oxiwchWGHa/B9w0AzrYO
    return bcrypt.hash(password, salt)
  })
  .then(hash => {
    console.log('Hash: ', hash)   // Hash: $2b$10$t7oxiwchWGHa/B9w0AzrYO2WH2rQbA86YSuQjSTmwIrpC/0ZXN7V2
  })
  .catch(err => console.error(err.message));


//Auto-generating a Salt and Hash 
bcrypt
  .hash(password, saltRounds)
  .then(hash => {
    console.log('Hash ', hash)    // $2b$10$b63K/D03WFBktWy552L5XuibmiD5SxCrKg9kHCqOYaZwxRjIg14u2
    //bcrypt hashing information     $\[algorithm]$[cost]$[salt\][hash]
    // - Algorithm: Will be "$2a$" or "$2b$" which means BCrypt
    // - Cost: Represents the exponent used to determine how many iterations 2^n
    // - Salt: (16-byte (128-bit)), base64 encoded to 22 characters
    // - Hash: (24-byte (192-bit)), base64 encoded to 31 characters
    validateUser(hash)
  })
  .catch(err => console.error(err.message))

//Using the bcrypt.compare function to verify Hash
function validateUser(hash) {
    bcrypt
      .compare(password, hash)
      .then(res => {
        console.log(res)          // return true
      })
      .catch(err => console.error(err.message))        
}