WheelEvent：deltaY 属性

io error: No such file or directory (os error 2) (/home/runner/work/yari/yari/mdn/translated-content/files/zh-cn/web/api/ui_events/index.md)

WheelEvent.deltaY 只读属性是一个表示以 WheelEvent.deltaMode 为单位的垂直滚动量的 double 值。

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

console.log(syntheticEvent.deltaY);