WheelEvent：deltaMode 属性
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
WheelEvent.deltaMode 只读属性返回 unsigned long，表示滚动量的 delta 值的单位。允许的值为：
| 常量 | 值 | 描述 |
|---|---|---|
DOM_DELTA_PIXEL |
0x00 |
delta 值以像素为单位。 |
DOM_DELTA_LINE |
0x01 |
delta 值以行为单位。 |
DOM_DELTA_PAGE |
0x02 |
delta 值以页为单位。 |
值
unsigned long。
示例
js
const syntheticEvent = new WheelEvent("syntheticWheel", {
deltaX: 4,
deltaMode: 0,
});
console.log(syntheticEvent.deltaMode);
规范
| Specification |
|---|
| UI Events # dom-wheelevent-deltamode |