<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<title>Swiper demo</title>
<style>
</style>
</head>
<body>
<input type="text" name="" id="m-input">
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script>
$('#m-input').on('keyup change', function () {
var that = $(this);
var val = that.val();
var temp = ""
for(var i = 0; i < val.length; i++) {
var char = val.charCodeAt(i);
if (char > 0 && char < 255 && char !== 32) {
temp += val.charAt(i)
}
}
that.val(temp);
});
</script>
</body>
</html>
禁止文本框输入中文和空格（适用于密码输入框）
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转载自blog.csdn.net/xutongbao/article/details/80591008
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