jQuery Form Validation before Ajax submit

Question

JavaScript bit     document  ready function                         form   submit function e                                      e preventDefault                    var  form     this                       check if the input is valid                 if    form valid    return false                        ajax                                            type  POST                       url  add php                       data     form   serialize                        success function response                                                    answers   html response                                                                            HTML bit        lt input type  text  name  answer 1   class  required    gt       lt input type  text  name  answer 2   class  required    gt    So this is the code I am trying to use  The idea is to get all my inputs validated before I send my form with Ajax  I ve tried numerous versions of this now but every time I end up with submitting even though the form is not entirely filled out  All my inputs are of the  required  class  Can anyone see what I am doing wrong   Also  I depend on class-based requirements as my input names are generated with php so I can never be sure what name id  or input types I get   I show hide questions as I go through it in  pages     lt input type  button  id  next  onClick  toggleVisibility  form3    class  next-btn   gt    JS   function toggleVisibility newSection                             section   not       newSection  hide                        newSection  show

User · Accepted Answer

You could use the submitHandler option  Basically put the   ajax call inside this handler  i e  invert it with the validation setup logic       form   validate            your validation rules come here       submitHandler  function form              ajax               url  form action              type  form method              data    form  serialize                success  function response                        answers   html response                                                     The jQuery validate plugin will invoke the submit handler if the validation has passed

User · Answer

first you don t need to add the classRules explicitly since required is automatically detected by the jquery validate plugin  so you can use this code     on form submit   you prevent the default behavior  if the form is Invalid stop the execution  else if valid send the ajax request        form   submit function  e      e preventDefault      var  form     this         check if the input is valid using a  valid  property   if    form valid  return false       ajax       type   POST       url   add php       data      form   serialize        success  function  response              answers   html response

User · Answer

Form native JavaScript checkValidity function is more then enough to trigger the HTML5 validation    document  ready function             urlSubmit   click function             if     urlForm   0  checkValidity                  alert  form submitting

User · Answer

I think that i first validate form and if validation will pass  than i would make ajax post  Dont forget to add  return false  at the end of the script

User · Answer

This specific example will just check for inputs but you could tweak it however  Add something like this to your  ajax function   beforeSend  function                              empty      form yourForm   find  input   filter function             return this value                     if  empty length            alert  You must fill out all fields in order to submit a change            return false       else          return true

User · Answer

You need to trigger form validation before checking if it is valid  Field validation runs after you enter data in each field  Form validation is triggered by the submit event but at the document level  So your event handler is being triggered before jquery validates the whole form  But fret not  there s a simple solution to all of this  You should validate the form  if    this  validate   form           do ajax stuff    https   jqueryvalidation org Validator form  validator-form

User · Answer

I think submitHandler with jquery validation is good solution  Please get idea from this code  Inspired from  Darin Dimitrov      calculate   validate                    submitHandler  function form                          ajax                           url   response php                           type   POST                           data    form  serialize                            success  function response                                      form id    ht-response-data   html response

User · Answer

gt  Required JS for jquery form validation  gt     jquery-1 7 1 min js     gt     jquery validate min js     gt     jquery form js        form data   validate       rules            first                    required  true                         middle                required  true                               image                required  true                        messages            first                    required   Please enter first                          middle                required   Please enter middle                                image                required   Please Select logo                         submitHandler  function form            var formData   new FormData     image   0              form  ajaxSubmit               url  action php               type  post               success  function data status                 alert data

User · Answer

function validateForm         var a document forms  Form    firstname   value      var b document forms  Form    midname   value      var c document forms  Form    lastname   value      var d document forms  Form    tribe   value      if  a  null    a     b  null    b     c  null    c     d  null    d                    alert  Please Fill All Required Field            return false            else             ajax           type   post           url   add php           data     form   serialize            success  function                alert  Patient added              document getElementById  form   reset                                      function              form   on  submit   function  e          e preventDefault           validateForm

User · Answer

You can try doing   if     form   validate       return true    else    return false

[jquery] jQuery Form Validation before Ajax submit

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