mouseEvent兼容IE

版权声明：本文为博主原创文章，码字不易，转载请先经本人同意。 https://blog.csdn.net/promiseCao/article/details/80916607

(function (window) {
            try {
                new MouseEvent('test');
                return false; // No need to polyfill
            } catch (e) {
                // Need to polyfill - fall through
            }

            // Polyfills DOM4 MouseEvent

            var MouseEvent = function (eventType, params) {
                params = params || { bubbles: false, cancelable: false };
                var mouseEvent = document.createEvent('MouseEvent');
                mouseEvent.initMouseEvent(eventType, params.bubbles, params.cancelable, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);

                return mouseEvent;
            }

            MouseEvent.prototype = Event.prototype;

            window.MouseEvent = MouseEvent;
        })(window);