MouseEvent.ctrlKey

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⁩.

MouseEvent.ctrlKey 是只读属性，可返回一个布尔值，当 ctrl 键被按下，返回 true，否则返回 false。

语法

var ctrlKeyPressed = instanceOfMouseEvent.ctrlKey

返回值

A boolean

示例

<html>
<head>
<title>ctrlKey example</title>

<script type="text/javascript">

function showChar(e){
  alert(
    "Key Pressed: " + String.fromCharCode(e.charCode) + "\n"
    + "charCode: " + e.charCode + "\n"
    + "CTRL key pressed: " + e.ctrlKey + "\n"
  );
}

</script>
</head>

<body onkeypress="showChar(event);">
<p>Press any character key, with or without holding down the CTRL key.<br />
You can also use the SHIFT key together with the CTRL key.</p>
</body>
</html>