Element: wheel event

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

This event replaces the non-standard deprecated mousewheel 事件。

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

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 of the target in the 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();
  scale += event.deltaY * -0.01;
  // 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');
el.onwheel = zoom;

addEventListener equivalent

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

el.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 17	IE 9 9 Internet Explorer only exposes the wheel event via `addEventListener` ; there is no `onwheel` attribute on DOM objects. See IE bug 782835 .	Opera 48	Safari 7	WebView Android 61	Chrome Android 61	Firefox Android 17	Opera Android 45	Safari iOS 7	Samsung Internet Android 8.0

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范例

Scaling an element via the wheel

addEventListener equivalent

规范

浏览器兼容性

图例

另请参阅

元数据

相关话题