localStorage api

api.js

this.api = (function() {
  var key = localStorage.getItem("_key") || 0;
	return {
		put: function( o, cb ) {
			localStorage.setItem("_key", key++ );
			localStorage.setItem( "squares:" + key, JSON.stringify( o ) );
			setTimeout( function() {
				cb(key);
			}, 250 );
		},
		get: function( cb ) {
			var l = localStorage.length;
			var results = [];
			for( var i = 0; i < l; i++) {
				var k = localStorage.key(i);
				if( /squares/.test(k) ) {
					results.push( { id: k.match(/\d+/), square: JSON.parse( localStorage.getItem( k ) ) } );
				}
			}
			setTimeout( function() {
				cb( results );
			}, 250 );
		},
		delete: function( id ) {
			localStorage.removeItem( "squares:" + id );
		}
	}
})();