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

js

var dY = event.deltaY;

例子

js

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