JS localStorage handler (requirements: underscore.js)

storage_handler.js

/**
 * Set and stringify local storage item(s)
 *
 * @param {(string|object)} key
 * @param {*} value
 */
window.setStorage = function(key, value) {
    if (_.isObject(key)) {
        _.each(key, function(value, key) {
            localStorage.setItem(key, JSON.stringify(value));
        });
    } else {
        localStorage.setItem(key, JSON.stringify(value));
    }
};

/**
 * Get and parse local storage item
 *
 * @param 	{string} key
 * @returns {*}
 */
window.getStorage = function(key) {
    return JSON.parse(localStorage.getItem(key));
};

/**
 * Remove local storage item(s)
 *
 * @param {(string|Array)} key
 */
window.removeStorage = function(key) {
    if (_.isArray(key)) {
        for (var i = 0, len = key.length; i < len; i++) {
            localStorage.removeItem(key[i]);
        }
    } else {
        localStorage.removeItem(key);
    }
};