tryjsref_event_key_which2 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool在线教程(w3cschool.cn)</title>
</head> 
<body>
<p>在输入框中输入键盘上的字母获取按下字母的 Unicode 字母代码和 Unicode 键代码 。</p>
<p><strong>注意：</strong>  which 和 keyCode 属性不能用于onkeypress的非打印事件，功能键 (如 CAPS LOCK, CTRL, ESC, F12, 等)。</p>
<input type="text" size="50" onkeypress="uniCharCode(event)" onkeydown="uniKeyCode(event)"> 
<p>onkeypress - <span id="demo"></span></p>
<p>onkeydown - <span id="demo2"></span></p>
<script>
function uniCharCode(event) { 
    var char = event.which || event.keyCode; 
    document.getElementById("demo").innerHTML = " Unicode 字符代码为: " + char;
}
function uniKeyCode(event) {
    var key = event.which || event.keyCode; 
    document.getElementById("demo2").innerHTML = " Unicode 键代码为: " + key;
}
</script>
</body>
</html>
 
 
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运行结果
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