Objects in localStorage via setObject(k, v, ttl) / getObject(k,v) and optional TTL values

localStorage.Object.js

Storage.prototype.setObject = function(key, value, ttl) {
	this.setItem(key, JSON.stringify(value));
	
	if(ttl) {
		this.setItem(key + "~ttl", moment.utc().add(ttl, "seconds").format("X"));
	}
};

Storage.prototype.getObject = function(key) {
	var value = this.getItem(key);

	// check ttl
	var ttl = this.getItem(key + "~ttl");
	if(ttl) {
    		var expired = moment(parseInt(ttl)).isAfter(moment.utc());
    		if(expired) {
        		this.removeItem(key);
        		this.removeItem(key + "~ttl");
        		return null;
    		}
	}

	return value && JSON.parse(value);    
};