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 | Status | Comment |
|---|---|---|
| Document Object Model (DOM) Level 3 Events Specification WheelEvent.deltaY |
Obsolete | Initial definition. |
浏览器兼容性
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| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 31 | (Yes) | 17.0 (17.0) | 9.0 [1] | 18 | 9.0 |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 17.0 (17.0) | ? | (Yes) | 未实现 |
[1] IE9 支持一个规范的一个旧版本的草稿, 这里的值的类型是 long 而不是一个 double 类型的值.