账号卡号4位分隔
2021-01-22 本文已影响0人
漠小涵
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<script type="text/javascript" src="/jquery/jquery.js"></script>
</head>
<body>
<input type="text" id="cardNo" />
</body>
<script>
var cardNo = document.querySelector("#cardNo");
//每4位加空格
cardNo.addEventListener('input', function(){
var v = cardNo.value;
if(/\S{5}/.test(v)){
this.value = v.replace(/\s/g, '').replace(/(.{4})/g, "$1 ");
}
})
//非数字和空格 替换为空
cardNo.addEventListener('keyup', function(){
var v = cardNo.value;
this.value = v.replace(/[^\d\s]/g, '');
})
</script>
</html>
