Question

我再次遇到jquery表单验证问题（与空的输入字段相关），我有三个输入字段，其中一个用于名字，姓氏和生日，当我单击“提交”按钮时，它不显示警告生日信息。 success.php文件仅包含消息“注册成功！”。这是我的HTML代码。

<!DOCTYPE html>
<html>
<head id="html">
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
	<link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/jquery.ui/1.10.4/themes/redmond/jquery-ui.css">
	<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"> </script>
	<style >
		#first-name{
			width: 300px;
			margin-top: 10px;
			margin-left: 510px;
			padding-left: 10px;
			border: 1px solid grey;
			border-radius: 5px;
		}
		#last-name{
			width: 300px;
			margin-top: 5px;
			margin-left: 510px;
			padding-left: 10px;
			border: 1px solid grey;
			border-radius: 5px;
		}
		#date-of-birth{
			width: 300px;
			margin-top: 5px;
			margin-left: 510px;
			padding-left: 10px;
			border: 1px solid grey;
			border-radius: 5px;	
		}
		#sign-up-button{
			width: 200px;
			margin-top: 10px;
			margin-left: 560px;
			font-size: 18px;
			border-radius: 50px;
		}
		#first-name-warning-message{	
			padding-left: 640px;
			font-size: 18px;
			font-weight: bold;
		}
		#last-name-warning-message{
			padding-left: 640px;
			font-size: 18px;
			font-weight: bold;
		}
		#dob-warning-message{
			padding-left: 640px;
			font-size: 18px;
			font-weight: bold;
		}
	</style>
</head>
<body id="body">
	<form id="sign-up" action="success.php" method="post">
		<div id="row-one">
			<input type="text" id="first-name" name="first_name" placeholder="First Name" maxlength="15">
		</div>
		<div id="span-container">
			<span id="first-name-warning-message" class="text-danger"> </span>
		</div>
		<div id="row-two">
			<input type="text" id="last-name" name="last_name" placeholder="Last Name" maxlength="15">
		</div>
		<div id="span-container">
			<span id="last-name-warning-message" class="text-danger"> </span>
		</div>
		<div id="row-three">
			<input class="date-picker" id="date-of-birth" name="user_dob" placeholder="Date Of Birth" readonly="true">
		</div>
		<div id="span-container">
			<span id="dob-warning-message" class="text-danger"> </span>
		</div>
		<div id="row-four">
			<button id="sign-up-button" class="btn btn-primary" type="submit"> Sign Up </button>
		</div>
	</form>
	<script>
		$(document).ready(function(){
			$('#first-name-warning-message').hide();
			$('#last-name-warning-message').hide();
			$('#dob-warning-message').hide();

			var first_name_error=false;
			var last_name_error=false;
			var dob_error=false;

			$('#first-name').focusout(function(){
				validate_first_name();
			});

			$('#last-name').focusout(function(){
				validate_last_name();
			});

			$('#date-of-birth').focusout(function(){
				validate_date_of_birth();
			});

			function validate_first_name(){
				var first_name=$('#first-name').val();
				var first_name_regex=/^[a-zA-Z ]{3,15}$/;
				if(first_name.length==''){
					$('#first-name-warning-message').show();
					$('#first-name-warning-message').html("Please Enter Your First Name !");
					first_name_error=true;
				}
				else if(first_name.length<3){
					$('#first-name-warning-message').show();
					$('#first-name-warning-message').html("First Name Not Valid !");
					first_name_error=true;
				}
				else if(!first_name_regex.test(first_name)){
					$('#first-name-warning-message').show();
					$('#first-name-warning-message').html("First Name Must Not Contain Any Digits Or Symbols !");
					first_name_error=true;
				}
				else{
					$('#first-name-warning-message').hide();
				}
			}

			function validate_last_name(){
				var last_name=$('#last-name').val();
				var last_name_regex=/^[a-zA-Z ]{3,15}$/;

				if(last_name.length==''){
					$('#last-name-warning-message').show();
					$('#last-name-warning-message').html("Please Enter Your Last Name !");
					last_name_error=true;
				}
				else if(last_name.length<3){
					$('#last-name-warning-message').show();
					$('#last-name-warning-message').html("Last Name Not Valid !");
					last_name_error=true;
				}
				else if(!last_name_regex.test(last_name)){
					$('#last-name-warning-message').show();
					$('#last-name-warning-message').html("Last Name Must Not Contain Any Digits Or Symbols !");
					last_name_error=true;
				}
				else{
					$('#last-name-warning-message').hide();
				}
			}

			function validate_date_of_birth(){
    			$("#date-of-birth").datepicker({
       				dateFormat:'yy-mm-dd',
        			changeMonth: true,
        			changeYear: true,
        			onClose: function validate_date_of_birth(selectedDate){
           				var date_of_birth=selectedDate;
           				if(date_of_birth.length==''){
              				$('#dob-warning-message').html("Please Enter Your Date Of Birth !");
               				$('#dob-warning-message').show();
               				dob_error=true;
           				}
           				else{
           		    		$('#dob-warning-message').hide();
           				}
           			}
    			}); 
    		}

    		$('#sign-up').submit(function(){
    			first_name_error=false;
    			last_name_error=false;
    			dob_error=false;

    			validate_first_name();
    			validate_last_name();
    			validate_date_of_birth();

    			if((first_name_error==false)&&(last_name_error==false)&&(dob_error==false)){
    				return true;
    			}
    			else{
    				return false;
    			}
    		});
		});
	</script>
</body>
</html>

请帮助

Answer 1

if($("#date-of-birth").datepicker("getDate") === null)

    <!DOCTYPE html>
    <html>
    <head id="html">
    	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
    	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
    	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
    	<link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/jquery.ui/1.10.4/themes/redmond/jquery-ui.css">
    	<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"> </script>
    	<style >
    		#first-name{
    			width: 300px;
    			margin-top: 10px;
    			margin-left: 510px;
    			padding-left: 10px;
    			border: 1px solid grey;
    			border-radius: 5px;
    		}
    		#last-name{
    			width: 300px;
    			margin-top: 5px;
    			margin-left: 510px;
    			padding-left: 10px;
    			border: 1px solid grey;
    			border-radius: 5px;
    		}
    		#date-of-birth{
    			width: 300px;
    			margin-top: 5px;
    			margin-left: 510px;
    			padding-left: 10px;
    			border: 1px solid grey;
    			border-radius: 5px;	
    		}
    		#sign-up-button{
    			width: 200px;
    			margin-top: 10px;
    			margin-left: 560px;
    			font-size: 18px;
    			border-radius: 50px;
    		}
    		#first-name-warning-message{	
    			padding-left: 640px;
    			font-size: 18px;
    			font-weight: bold;
    		}
    		#last-name-warning-message{
    			padding-left: 640px;
    			font-size: 18px;
    			font-weight: bold;
    		}
    		#dob-warning-message{
    			padding-left: 640px;
    			font-size: 18px;
    			font-weight: bold;
    		}
    	</style>
    </head>
    <body id="body">
    	<form id="sign-up" action="success.php" method="post">
    		<div id="row-one">
    			<input type="text" id="first-name" name="first_name" placeholder="First Name" maxlength="15">
    		</div>
    		<div id="span-container">
    			<span id="first-name-warning-message" class="text-danger"> </span>
    		</div>
    		<div id="row-two">
    			<input type="text" id="last-name" name="last_name" placeholder="Last Name" maxlength="15">
    		</div>
    		<div id="span-container">
    			<span id="last-name-warning-message" class="text-danger"> </span>
    		</div>
    		<div id="row-three">
    			<input class="date-picker" id="date-of-birth" name="user_dob" placeholder="Date Of Birth" readonly="true">
    		</div>
    		<div id="span-container">
    			<span id="dob-warning-message" class="text-danger"> </span>
    		</div>
    		<div id="row-four">
    			<button id="sign-up-button" class="btn btn-primary" type="submit"> Sign Up </button>
    		</div>
    	</form>
    	<script>
    		$(document).ready(function(){
    			$('#first-name-warning-message').hide();
    			$('#last-name-warning-message').hide();
    			$('#dob-warning-message').hide();

    			var first_name_error=false;
    			var last_name_error=false;
    			var dob_error=false;

    			$('#first-name').focusout(function(){
    				validate_first_name();
    			});

    			$('#last-name').focusout(function(){
    				validate_last_name();
    			});

    			$('#date-of-birth').focusout(function(){
    				validate_date_of_birth();
    			});

    			function validate_first_name(){
    				var first_name=$('#first-name').val();
    				var first_name_regex=/^[a-zA-Z ]{3,15}$/;
    				if(first_name.length==''){
    					$('#first-name-warning-message').show();
    					$('#first-name-warning-message').html("Please Enter Your First Name !");
    					first_name_error=true;
    				}
    				else if(first_name.length<3){
    					$('#first-name-warning-message').show();
    					$('#first-name-warning-message').html("First Name Not Valid !");
    					first_name_error=true;
    				}
    				else if(!first_name_regex.test(first_name)){
    					$('#first-name-warning-message').show();
    					$('#first-name-warning-message').html("First Name Must Not Contain Any Digits Or Symbols !");
    					first_name_error=true;
    				}
    				else{
    					$('#first-name-warning-message').hide();
    				}
    			}

    			function validate_last_name(){
    				var last_name=$('#last-name').val();
    				var last_name_regex=/^[a-zA-Z ]{3,15}$/;

    				if(last_name.length==''){
    					$('#last-name-warning-message').show();
    					$('#last-name-warning-message').html("Please Enter Your Last Name !");
    					last_name_error=true;
    				}
    				else if(last_name.length<3){
    					$('#last-name-warning-message').show();
    					$('#last-name-warning-message').html("Last Name Not Valid !");
    					last_name_error=true;
    				}
    				else if(!last_name_regex.test(last_name)){
    					$('#last-name-warning-message').show();
    					$('#last-name-warning-message').html("Last Name Must Not Contain Any Digits Or Symbols !");
    					last_name_error=true;
    				}
    				else{
    					$('#last-name-warning-message').hide();
    				}
    			}
                function validate_date_of_birth(){
                    if($("#date-of-birth").datepicker("getDate") === null) {
                    	$('#dob-warning-message').html("Please Enter Your Date Of Birth !");
                        $('#dob-warning-message').show();
                        dob_error=true;
                    }
                    else {
                        $('#dob-warning-message').hide();
                    }
                    return false;
                }
    			$("#date-of-birth").datepicker({
                    dateFormat:'yy-mm-dd',
                    changeMonth: true,
                    changeYear: true
                }); 

        		$('#sign-up').submit(function(){
        			first_name_error=false;
        			last_name_error=false;
        			dob_error=false;

        			validate_first_name();
        			validate_last_name();
        			validate_date_of_birth();

        			if((first_name_error==false)&&(last_name_error==false)&&(dob_error==false)){
        				return true;
        			}
        			else{
        				return false;
        			}
        		});
    		});
    	</script>
    </body>
    </html>

使用jQuery验证空输入字段

1 个答案: