要求,頁面有多個class相同的input輸入框,在提交數據的時候,進行驗證,驗證input框不能爲空,如果哪個爲空,則彈出提示:
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>驗證多個class相同的input框不爲空</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>
司乘卡號: <input class="personDeviceId" type="text" /><br />
司乘卡號: <input class="personDeviceId" type="text" /><br />
司乘卡號: <input class="personDeviceId" type="text" /><br />
<button type="button" class="btn blue" id="addBtn">保存</button>
</body>
<script type="text/javascript">
$("#addBtn").on("click", function() {
//驗證車乘
var personDeviceId = ($(".personDeviceId").length);
for (var i = 0; i < personDeviceId; i++) {
if ($(".personDeviceId").eq(i).val().length == 0) {
alert("第" + (i + 1) + "個司乘卡號爲空");
return;
};
};
})
</script>
</html>
效果如下圖所示