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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

KeyboardEvent.metaKey read-only property returning a 布尔 that indicates if the Meta key was pressed ( true ) 或不 ( false ) when the event occurred. Some operating systems may intercept the key so it is never detected.

注意： On Macintosh keyboards, this is the ⌘ Command key. On Windows keyboards, this is the Windows key ( ⊞ Windows ).

At least as of Firefox 48, the ⊞ Windows key is not considered the "Meta" key. KeyboardEvent.metaKey is false 当 ⊞ Windows is pressed.

句法

var metaKeyPressed = instanceOfKeyboardEvent.metaKey
					

返回值

A 布尔

范例

function ismetaKey(e) {
  alert("metaKey = " + e.metaKey);
}
					

<button onclick="ismetaKey(event)">Click me with the meta key</button>
					

规范

规范	状态	注释
DOM (文档对象模型) 3 级事件规范 The definition of 'KeyboardEvent.metaKey' in that specification.	过时	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 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
metaKey	Chrome Yes	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

另请参阅

• KeyboardEvent

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. KeyboardEvent
2. 构造函数

   1. KeyboardEvent()
3. 特性

   1. altKey
   2. charCode
   3. code
   4. ctrlKey
   5. isComposing
   6. key
   7. keyCode
   8. keyIdentifier
   9. location
   10. metaKey
   11. repeat
   12. shiftKey
   13. which
4. 方法

   1. getModifierState()
   2. initKeyboardEvent()
   3. initKeyEvent()
5. 继承：

   1. UIEvent
   2. 事件
6. DOM 事件相关页面

   1. CompositionEvent
   2. 事件
   3. EventListener
   4. EventTarget
   5. FocusEvent
   6. InputEvent
   7. MouseEvent
   8. MouseScrollEvent
   9. MouseWheelEvent
   10. MutationEvent
   11. ProgressEvent
   12. UIEvent
   13. WheelEvent