npm i bcrypt

const bcrypt = require('bcrypt');
async function hashIt(password){
  const salt = await bcrypt.genSalt(6);
  const hashed = await bcrypt.hash(password, salt);
}
hashIt(password);
// compare the password user entered with hashed pass.
async function compareIt(password){
  const validPassword = await bcrypt.compare(password, hashedPassword);
}
compareIt(password);

//hash password
const hashedPassword = bcrypt.hashSync(yourPasswordFromSignupForm, bcrypt.genSaltSync());

//verify password
const doesPasswordMatch = bcrypt.compareSync(yourPasswordFromLoginForm, yourHashedPassword)

<script>
$(document).ready(function(){
    $('#checkbox').on('change', function(){
        $('#password').attr('type',$('#checkbox').prop('checked')==true?"text":"password"); 
    });
});
</script>
<input type="password" id="password"> 
<input type="checkbox" id="checkbox">Show Password