1    function customEvent (currentTarget, type, bubbles, cancelable, detail) {

 2         /* 自定义响应事件 */

 3         //IE9+

 4         if (document.implementation.hasFeature("CustomEvents", "3.0")) {

 5             bubbles = (bubbles === undefined) ? true : bubbles; // 默认事件冒泡

 6             cancelable = (cancelable === undefined) ? true : cancelable; // 默认事件可以取消

 7             detail = detail || {}; //这里可以是事件中包含的信息、数据

 8             var e = document.createEvent("CustomEvent");

 9             e.initCustomEvent(type, bubbles, cancelable, detail);

10             currentTarget.dispatchEvent(e); // 触发事件

11         }

12         else console.log("该环境不支持自定义事件！");

13     }