Storing and Retrieving JSON from Local Storage

localStorage.js

function storeItem(itemName, data) {
    localStorage.setItem(itemName, btoa(JSON.stringify(data)));
}

function retrieveItem(itemName) {
    var x = localStorage.getItem(itemName);
    if (!x) { console.log("Element not found in local storage"); return false; }
    localStorage.removeItem('x');
    x = atob(x);
    return $.parseJSON(x);
}