​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>KeyboardEvent code 属性</h1>
​
<p>请在输入字段中按键盘上的某个键：</p>
​
<input type="text" size="40" onkeypress="myFunction(event)">
​
<p>code 属性返回您按下的键的名称：</p>
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<p id="demo"></p>
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<script>
function myFunction(event) {
  var x = event.code;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​