兼容各浏览器的鼠标滚动事件写法

wheelEvent = "onwheel" in document.createElement("div") ? "wheel" : // Modern browsers support "wheel"document.onmousewheel !== undefined ? "mousewheel" : // Webkit and IE support at least
2016-07-21 业界
JavaScript html5 
wheelEvent = "onwheel" in document.createElement("div") ? "wheel" : // Modern browsers support "wheel"

            document.onmousewheel !== undefined ? "mousewheel" : // Webkit and IE support at least "mousewheel"

            "DOMMouseScroll" // let's assume that remaining browsers are older Firefox

关键字：JavaScript, html5

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