Скачать jQuery 3.1.1
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
Nitria
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script><html>
<head>
<title>My Stag</title>
<script src="jquery-3.2.1.min.js"></script>
<script>
$(document).ready(function(){
$("input").hide();
});
</script>
</head>
<body>
<input/>
</body>
</html>