KeyboardEvent.altKey

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。

示例

<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>

标准

Specification	Status	Comment
Document Object Model (DOM) Level 3 Events Specification KeyboardEvent.altkey	Obsolete	Initial definition.

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)

Desktop
Mobile

特性

Edge	Firefox (Gecko)	Chrome	Internet Explorer	Opera	Safari
基本支持	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)

特性

Edge	Firefox Mobile (Gecko)	Android	IE Mobile	Opera Mobile	Safari Mobile
基本支持	(Yes)	?	?	?	?	?

参考

KeyboardEvent

KeyboardEvent.altKey

语法

返回值

示例

标准

浏览器兼容性

参考