hash.js

const bcrypt = require('bcrypt')    // return object

function run(){
    async function hash(){
        const salt = await bcrypt.genSalt(10)
        const hashedPassword = await bcrypt.hash('1234', salt)
        console.log(`Salt: ${salt}`)
        console.log(`Hashed Password: ${hashedPassword}\n`)
    }

    async function countSaltCharacters(){
        const salt = await bcrypt.genSalt(10000000000000000000000)
        console.log(`Salt: ${salt}`)
        console.log(`Salt Length: ${salt.length}`)
    }

    async function validate(password){
        const salt = await bcrypt.genSalt(10)
        const mypassword = '2342'
        const hash = await bcrypt.hash(mypassword, salt)

        const isValid = await bcrypt.compare(password, hash)
        console.log(isValid)
    }

    // countSaltCharacters()
    validate('2341')
}

run()