example.js

$Storage.set('lang','EN');

var lang = $Storage.get('lang');

$Storage.setJson('user',{
  'username':'james bond',
  'password':'cbdb7e2b1ed566ceb796af2df07205a3' //bond007
});

var user = $Storage.getJson('user');
 
$Storage.delete('user'); // remove 'user' data
// OR
$Storage.clear(); // remove all data

localStorage.js

$Storage = {};
$Storage.setJson = function (name, value) {
  localStorage.setItem(name, JSON.stringify(value));
}
$Storage.set = function (name, value) {
  localStorage.setItem(name, value);
}
$Storage.get = function (name) {
  return localStorage.getItem(name);
}
$Storage.getJson = function (name) {
  return JSON.parse(localStorage.getItem(name));
}
$Storage.delete = function (name) {
  localStorage.removeItem(name);
}
$Storage.clear = function () {
  localStorage.clear();
}