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<!DOCTYPE html> <html> <body> <h1>KeyboardEvent code 属性</h1> <p>在输入域中按下键盘上的一个键：</p> <input type="text" size="40" onkeypress="myFunction(event)"> <p>code 属性返回你按下的键的名称：</p> <p id="demo"></p> <script> function myFunction(event) { var x = event.code; document.getElementById("demo").innerHTML = x; } </script> </body> </html>