<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js 去掉字符串中的非数字</title>
<style type="text/css">
</style>
</head>
<body>
<input type="text" >
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
<script type="text/javascript">
$('#m-code').on('keyup', function() {
var val = $(this).val();
val = val.replace(/[^0-9]/ig,"");
$(this).val(val);
});
</script>
</body>
</html>
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