KeyboardEvent.altKey
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
KeyboardEvent.altKey 只读属性返回一个 Boolean 值，表示事件触发时 alt 键 (OS X 系统上的 Option 或 ⌥ 键) 是 (true) 否 (false) 被按下。
值
一个布尔值。
示例
js
<html> <head> <title>altKey example</title> <script type="text/javascript"> function showChar(e){ alert( "Key Pressed: " + String.fromCharCode(e.charCode) + "\n" + "charCode: " + e.charCode + "\n" + "ALT key pressed: " + e.altKey + "\n" ); } </script> </head> <body onkeypress="showChar(event);"> <p> Press any character key, with or without holding down the ALT key.<br /> You can also use the SHIFT key together with the ALT key. </p> </body> </html> 规范
| Specification |
|---|
| UI Events # dom-keyboardevent-altkey |
浏览器兼容性
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