MouseEvent.altKey
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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。
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-mouseevent-altkey |
浏览器兼容性
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