Question

我试图找出使用jQuery用 ctrl 键按下的字符，但我无法找出代码。

例如：如果我按 ctrl + a 那么它应该提示我 ctrl + a 被按下

我正在使用以下代码

  $(document).keypress(function(e) {
  if(e.ctrlKey){
     var ch = String.fromCharCode(e.keyCode);
     alert("key pressed ctrl+"+ch); //gives blank value in ch here, I need to know the             character pressed
     alert("key pressed ctrl+"+e.keyCode); //this works but gives me ASCII value of the key 
   }
});

Answer 1

您必须使用keydown事件可靠地捕获密钥代码：

$(document).keydown(function(event) {
    console.log(event);
    if (!event.ctrlKey){ return true; }
    $("#result").text(String.fromCharCode(event.which));
    event.preventDefault();
});

http://jsfiddle.net/7S6Hz/3/

Answer 2

<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>

使用jQuery找出用ctrl键按下的键

2 个答案: