MouseEvent.altKey

MouseEvent.altKey 只读属性是一个Boolean变量。当事件触发时，如果alt 被按下，则返回 true，否则返回false。

语法

var altKeyPressed = instanceOfMouseEvent.altKey

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>

规范

Specification	Status	Comment
Document Object Model (DOM) Level 3 Events Specification MouseEvent.altkey	Obsolete	No change from Document Object Model (DOM) Level 2 Events Specification.
Document Object Model (DOM) Level 2 Events Specification MouseEvent.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

Feature	Firefox (Gecko)	Chrome	Internet Explorer	Opera	Safari
Basic support	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)

Feature	Firefox Mobile (Gecko)	Android	IE Mobile	Opera Mobile	Safari Mobile
Basic support	?	?	?	?	?

MouseEvent.altKey

语法

示例

规范

浏览器兼容性

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