Document: wheel event

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范例
规范
浏览器兼容性
另请参阅
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wheel event fires when the user rotates a wheel button on a pointing device (typically a mouse).

冒泡	Yes
可取消	Yes
接口	`WheelEvent`
事件处理程序特性	`GlobalEventHandlers.onwheel`

This event replaces the non-standard deprecated mousewheel 事件。

注意： Don't confuse the wheel event with the scroll event. The default action of a wheel event is implementation-specific, and doesn't necessarily dispatch a scroll event. Even when it does, the delta* values in the wheel event don't necessarily reflect the content's scrolling direction. Therefore, do not rely on the wheel event's delta* properties to get the scrolling direction. Instead, detect value changes of scrollLeft and scrollTop 在 scroll 事件。

范例

Scaling an element via the wheel

This example shows how to scale an element using the mouse (or other pointing device) wheel.

<div>Scale me with your mouse wheel.</div>

body {
  min-height: 100vh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
div {
  width: 105px;
  height: 105px;
  background: #cdf;
  padding: 5px;
}

function zoom(event) {
  event.preventDefault();
  if (event.deltaY < 0) {
    // Zoom in
    scale *= event.deltaY * -2;
  }
  else {
    // Zoom out
    scale /= event.deltaY * 2;
  }
  // Restrict scale
  scale = Math.min(Math.max(.125, scale), 4);
  // Apply scale transform
  el.style.transform = `scale(${scale})`;
}
let scale = 1;
const el = document.querySelector('div');
document.onwheel = zoom;

addEventListener equivalent

The event handler can also be set up using the addEventListener() 方法：

document.addEventListener('wheel', zoom);

规范

规范	状态	注释
UI Events The definition of 'wheel' in that specification.	工作草案

浏览器兼容性

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`wheel` event	Chrome 61	Edge 12	Firefox Yes	IE Yes	Opera 48	Safari 6.1	WebView Android 61	Chrome Android 61	Firefox Android Yes	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0

图例

完整支持
不支持

另请参阅

WheelEvent

元数据

最后修改： Jul 27, 2020

在此页

范例

Scaling an element via the wheel

addEventListener equivalent

规范

浏览器兼容性

图例

另请参阅

相关话题