WheelEvent.deltaY

WheelEvent.deltaY 只读属性是一个 double 类型值，声明垂直滚动量以 WheelEvent.deltaMode 为单位。

语法

var dY = event.deltaY;

例子

var syntheticEvent = new WheelEvent("syntheticWheel", {"deltaY": 4, "deltaMode": 0});

console.log(syntheticEvent.deltaY);

规范

Specification
UI Events
# dom-wheelevent-deltay

浏览器兼容性

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另见