[jQuery入門]event.keyでキーコードを判定するサンプル
書式
$(“#selectorID").keydown(function(event)
使用例
<input id="usrId" type="text" value="" maxlength="1" autocomplete="off"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script> $("#usrId").keydown(function(event) { if (event.key === "Alt"){ console.log("alt key is pressed"); } if (event.key === "Enter"){ console.log("Enter key is pressed"); } if (event.key === "Shift"){ console.log("shift key is pressed"); } if (event.key === "Control"){ console.log("ctrl key is pressed"); } }); </script>