KeyboardEvent.altKey
read-only property is a
布尔
that indicates if the
alt
key (
选项
or
⌥
on OS X) was pressed (
true
) 或不 (
false
) when the event occured.
var altKeyPressed = instanceOfKeyboardEvent.altKey
<html>
<head>
<title>altKey example</title>
<script type="text/javascript">
function showChar(e){
alert(
"Key KeyDown: " + String.fromCharCode(e.charCode) + "\n"
+ "charCode: " + e.charCode + "\n"
+ "ALT key KeyDown: " + e.altKey + "\n"
);
}
</script>
</head>
<body onkeydown="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 | 状态 | 注释 |
|---|---|---|
|
DOM (文档对象模型) 3 级事件规范
The definition of 'KeyboardEvent.altkey' in that specification. |
过时 | 初始定义。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
altKey
|
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 |
完整支持