I tried searching the web for a node module that can access the client's localStorage but wasn't able to find anything. Anyone know of one?
If you mean html 5 localStorage, there's no such a thing since node.js is a server-side technology. Html 5 localStorage is a client side feature supported
You can use :
node-localstorage
npm module to use localStorage
at the nodejs server side.
var LocalStorage = require('node-localstorage').LocalStorage,
localStorage = new LocalStorage('./scratch');
When the page loads, send a post that queries the contents of the client's localStorage.