Building Enterprise JavaScript Applications

Implementation

JavaScript's Math.random() does not provide an option to provide a seed, but there are libraries out there that implement a PRNG in JavaScript. Two of the most popular ones are seedrandom and random-seed. Out of the two, the random-seed package provides a string(count) method that'll generate a random string instead of a random number; because of this convenience, we will use the random-seed package to generate our fake salt.

First, let's install it:

$ yarn add random-seed

Now, create a new file at utils/generate-fake-salt.js and define a new generateFakeSalt function that will output a fake salt based on the email of the user:

import randomseed from 'random-seed';function generateFakeSalt(seed) {  const salt = randomseed // ...