版权声明：学习交流。。 https://blog.csdn.net/qq_38881495/article/details/83743463
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>禁止输入空格键</title>
<script src="http://libs.baidu.com/jquery/1.11.3/jquery.min.js"></script>
</head>
<body>
<input type="text" />
</body>
<script>
$('input').keydown(function(e) {
if (e.keyCode == 32) {
return false;
}
});
</script>
</html>