Submit form after calling e preventDefault

Question

I m doing some simple form validation here and got stuck on a very basic issue  I have 5 field pairs for name and entree  for a dinner registration   The user can enter 1-5 pairs  but an entree must be selected if a name is present  Code   http   jsfiddle net eecTN 1    lt form gt      Name   lt input name  atendeename    gt      Entree   lt input name  entree    gt  lt br gt      Name   lt input name  atendeename    gt      Entree   lt input name  entree    gt  lt br gt      Name   lt input name  atendeename    gt      Entree   lt input name  entree    gt  lt br gt      Name   lt input name  atendeename    gt      Entree   lt input name  entree    gt  lt br gt      Name   lt input name  atendeename    gt      Entree   lt input name  entree    gt  lt br gt       lt input type  submit  value  Submit  gt   lt  form gt         Prevent form submit if any entrees are missing    form   submit function e        e preventDefault            Cycle through each Attendee Name         name  atendeename       this  each function index  el               If there is a value         if    el  val                      Find adjacent entree input             var entree     el  next  input                    If entree is empty  don t submit form             if     entree val                      alert  Please select an entree                    entree focus                    return false                                          form   unbind  submit   submit           The error message is working  but it s submitting the form every time  I know there s something wrong with this line      form   unbind  submit   submit         but I m not sure what I need to do

User · Answer

In my case there was a race  as I needed the ajax response to fill a hidden field and send the form after it s filled  I fixed it with putting e preventDefault   into a condition  var all is done false     quot form quot   submit function e     if all is done  false      e preventDefault       do the stuff            function do the stuf        do stuff   all is done true       quot form quot   submit

User · Answer

The simplest solution is just to not call e preventDefault   unless validation actually fails  Move that line inside the inner if statement  and remove the last line of the function with the  unbind   submit

User · Answer

Use the native element submit   to circumvent the preventDefault in the jQuery handler  and note that your return statement only returns from the each loop  it does not return from the event handler     form   submit function e       e preventDefault         var valid   true           name  atendeename       this  each function index  el            if     el  val                   var entree     el  next  input                 if     entree val                      entree focus                    valid   false                                       if  valid  this submit

User · Answer

The problem is that  even if you see the error  your return false affects the callback of the  each   method     so  even if there is an error  you reach the line     form   unbind  submit   submit      and the form is submitted   You should create a variable  validated  for example  and set it to true  Then  in the callback  instead of return false  set validated   false   Finally     if  validated     form   unbind  submit   submit      This way  only if there are no errors will the form be submitted

User · Answer

Binding to the button would not resolve for submissions outside of pressing the button e g  pressing enter

User · Answer

came across the same prob and found no straight solution to it on the forums etc  Finally the following solution worked perfectly for me  simply implement the following logic inside your event handler function for the form  submit  Event  document getElementById  myForm   addEventListener  submit   handlerToTheSubmitEvent    function handlerToTheSubmitEvent e         DO NOT use e preventDefault                   your form validation logic goes here             if allInputsValidatedSuccessfully              return true              else           return false             SIMPLE AS THAT  NOTE  when a  false  is returned from the handler of the form  submit  event  the form is not submitted to the URI specified in the action attribute of your html markup  until and unless a  true  is returned by the handler  and as soon as all your input fields are validated a  true  will be returned by the Event handler  and your form is gonna be submitted  ALSO NOTE THAT  the function call inside the if   condition is basically your own implementation of ensuring that all the fields are validated and consequently a  true  must be returned from there otherwise  false

User · Answer

Actually this seems to be the correct way      form   submit function e          prevent default     e preventDefault           do something here        continue submitting     e currentTarget submit

User · Answer

Why not bind the submit button event than the form itself  it would really much easier and safer if you bind the buttons than the form itself as the form will mostly submit unless you will use preventDefault    x000D   x000D      btn-submit   on  click   function  e    x000D      var submitAllow   true  x000D          name  atendeename       this  each function index  el   x000D             If there is a value x000D          if    el  val      x000D                 Find adjacent entree input x000D              var entree     el  next  input    x000D   x000D                 If entree is empty  don t submit form x000D              if     entree val      x000D                  alert  Please select an entree    x000D                  entree focus    x000D                  submitAllow   false  x000D                  return false  x000D                x000D            x000D          x000D      if  submitAllow    x000D              form-attendee   submit    x000D        x000D      x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   lt form id  form-attendee  gt  x000D      Name   lt input name  atendeename    gt  x000D      Entree   lt input name  entree    gt  lt br gt  x000D      Name   lt input name  atendeename    gt  x000D      Entree   lt input name  entree    gt  lt br gt  x000D      Name   lt input name  atendeename    gt  x000D      Entree   lt input name  entree    gt  lt br gt  x000D      Name   lt input name  atendeename    gt  x000D      Entree   lt input name  entree    gt  lt br gt  x000D      Name   lt input name  atendeename    gt  x000D      Entree   lt input name  entree    gt  lt br gt  x000D       lt button type  button  id  btn-submit  gt Submit lt button gt  x000D   lt  form gt  x000D   x000D   x000D

User · Answer

form   submit function e        var submitAllow   true          Cycle through each Attendee Name         name  atendeename       this  each function index  el               If there is a value         if    el  val                      Find adjacent entree input             var entree     el  next  input                    If entree is empty  don t submit form             if     entree val                      alert  Please select an entree                    entree focus                    submitAllow   false                  return false                                       return submitAllow

User · Answer

Sorry for delay  but I will try to make perfect form     I will added Count validation steps and check every time not  val    Check  length  because I think is better pattern in your case  Of course remove unbind function   My jsFiddle  Of course source code       Prevent form submit if any entrees are missing    form   submit function e        e preventDefault         var formIsValid   true          Count validation steps     var validationLoop   0          Cycle through each Attendee Name         name  atendeename       this  each function index  el               If there is a value         if    el  val   length  gt  0                validationLoop                    Find adjacent entree input             var entree     el  next  input                 var entreeValue   entree val                    If entree is empty  don t submit form             if  entreeValue length     0                    alert  Please select an entree                    entree focus                    formIsValid   false                  return false                                         if  formIsValid  amp  amp  validationLoop  gt  0            alert  Correct Form            return true        else           return false

[javascript] Submit form after calling e.preventDefault()

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