1 import EventEmitter from 'event-emitter' 

     2 var eventEmitter = EventEmitter({});

     3 

     4 

     5 var generateId = (function () {

     6 		var cpt = 0;

     7 		var defautPrefix = "item_"; 

     8 		return function (prefix) {

     9 			prefix = (typeof prefix === "string") ? prefix : defautPrefix;

    10 			cpt = cpt + 1;

    11 			return prefix + cpt; 

    12 		}

    13 	}());

    14 

    15 export { generateId , eventEmitter }