How to saving salt

Question

maybe, in the signup process,
( I using express.js, MySQL, Sequelize )

1. get ID and PW at Front-end
2. saving ID in DB
3. hashing the pw with salt
4. save hashed pw in DB

And,,, can I use salt used before?

when some user log-in this server,
their PW will be hashing and compair with DB data.
but salt is just random..
so I wanna save salt value!

Answer 1

If you're using bcrypt

const salt = bcrypt.genSaltSync(12)
// Continue whatever user saving happens here with salt

Other libraries may also have these functions, generate a salt, use it as the parameter of hashing