使用JQuery进行表单验证(如果/其他) [英] Form validation if/else with JQuery

问题描述

我正在进行表单验证，所有字段都必须填写，并检查用户是否接受条款"，并检查电子邮件是否正确.几乎可以正常工作，如果我没有输入姓名/电子邮件等，此代码会给我答复，但如果输入此信息，则不会隐藏(.alert).alert.然后不响应条款和有效电子邮件"复选框的复选框.如果没有响应"，也应该始终隐藏"警报.

I'm making a form validation, where all fields should be required and also check if the user "accept terms", and also check if the e-mail is correct. It almost works, this code gives me a response if I haven't entered name/e-mail etc but if I enter this information, it doesn't hide() the .alert. And then doesn't response to the checkbox for terms and "valid e-mail" check. The .alert should also always be "hidden" if there are no "response".

此代码在哪里失败?有什么想法吗?

Where does this code fail? Any thoughts?

$("form").submit(function (e) {
 e.preventDefault(); // This will prevent the form submission

    var response = ""; 
     $('#submit-holder').find('input').each(function(){
         if ($(this).val() == '') {
         response += ", " + $('label[for="' + this.id + '"]').html();
         empty_fields = true;     
         }    

         else if ($(this).val() == !'') {
         empty_fields = false;
             $('.alert').hide()  
         }

         else if(empty_fields = true ) {
                    $('.alert').addClass('alert-danger')
                    $('.alert').fadeIn()               
                    $('.error_message').text(response.replace(", ", "You need to fill out: "))
                    message = response.replace(", ", "You need to fill out: ")
                    response_message(message)
         }   

        else if ($('[name="txtEmail"]').length !== 0) {

            var email = $('[name="txtEmail"]').val();

            if(IsEmail(email)==false){
                    message = "The e-mail address you've entered is invalid";
                    response_message(message)
                       //return false;
                   }
            }

           else if($('#user_terms').not(":checked")){ 
           message = "You need to accept the terms and conditions to continue";
           response_message(message)
              //return false;

             } 

         }); 

 if($('#user_terms').is(":checked") && !response) {

  // Send the form

 } 


// Functions:
 function IsEmail(email) {
    var regex = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if(!regex.test(email)) {
       return false;
    }else{
       return true;
    }
  }

function response_message(message) {

    $('.alert').addClass('alert-danger')
    $('.alert').fadeIn()               
    $('.error_message').text(message)
}    

推荐答案

这段代码可以正常运行，但是我不确定您的逻辑是否正确.

Hi this code will work without errors , but i am not sure about your logic is correct.

$("form").submit(function (e) {
 e.preventDefault(); // This will prevent the form submission

    var response = ""; 
     $('#submit-holder').find('input').each(function(){
         if ($(this).val() == '') {
         response += ", " + $('label[for="' + this.id + '"]').html();
         empty_fields = true;     
         }    

         else if ($(this).val() != '') {
         empty_fields = false;
             $('.alert').hide();  
         }

         else if(empty_fields = true ) {
                    $('.alert').addClass('alert-danger');
                    $('.alert').fadeIn();         
                    $('.error_message').text(response.replace(", ", "You need to fill out: "));
                    message = response.replace(", ", "You need to fill out: ");
                    response_message(message);
         }   

        else if ($('[name="txtEmail"]').length !== 0) {

            var email = $('[name="txtEmail"]').val();

            if(IsEmail(email)==false){
                    message = "The e-mail address you've entered is invalid";
                    response_message(message);
                       //return false;
                   }
            }

           else if($('#user_terms').not(":checked")){ 
           message = "You need to accept the terms and conditions to continue";
           response_message(message);
              //return false;

             } 

         }); 

 if($('#user_terms').is(":checked") && !response) {

  // Send the form

 } 


// Functions:
 function IsEmail(email) {
    var regex = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if(!regex.test(email)) {
       return false;
    }else{
       return true;
    }
  }

function response_message(message) {

    $('.alert').addClass('alert-danger');
    $('.alert').fadeIn();          
    $('.error_message').text(message);
} 

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