Develop Reference

Set associated form for custom element like form attribute for the input element?

Due to the layout of my page I would like to place a custom element outside of a form.
Can I make something like <my-custom-element form="foo"> work?

Presuming you want the submit button to return the value of your element even though it is outside the form. This is one way, there are many more (including using the function here called addExtras() to dynamically append your external name/value pair(s) to the form).
<my-custom-element> <input name="custom" id="custom" value="foo"></my-custom-element>
<form id="myForm" onsubmit="return addExtras()" method="post">
<input type="hidden"" name="customItem" id="customItem" />
<input name="anotherField" value="india" />
<button type="submit">submit</button>
</form>
<script>
function addExtras() {
document.getElementById("customItem").value = document.getElementById("custom").value;
return true;
}
// ==========================================================
//Code to display the submitted items, and prevent submission for test purposes
//Not needed for production
document.getElementById("myForm").addEventListener('submit', function (e) {
//prevent the normal submission of the form
e.preventDefault();
for (var i = 0; i < document.getElementById("myForm").elements.length; i++) {
var e = document.getElementById("myForm").elements[i];
console.log(e.name, e.value)
}
});
</script>

Form not submiting on chrome but in firefox submitting

I have a submmit button like Following:
Save & Continue
And My function in js is:
function checkCreditDebit(buttonValues) {
//Some validation here
//Disable Button if once clicked to prevent twice form submission
document.getElementById('saveandcontinue').disabled = 'disabled';
document.getElementById('onlysave').disabled = 'disabled';
}
But when i submit form in firefox it disabled the "save & continue", button and submit form. But in chrome it disable the button but not submit the form. What is the wrong with this please suggest. Thanks in Advance

Instead of just disabling your submit button(forms can also be submitted if you press enter on text-boxes), attach a handler to your form that will leave a 'class name' to your form as a mark that the form was already submitted, if the user submit the form again, the handler should check if the form has already the class name, then prevent duplicate submission via event.preventDefault().
try this:
<form onsubmit="prevent_duplicate(event,this);" action="">
<input type="text" />
<input type="submit" />
</form>
<script>
function prevent_duplicate(event,form)
{
if((" "+form.className+" ").indexOf(" submitted ") > -1)
{
alert("can't submit more than once!!!");
event.preventDefault();
}
else
{
form.classList.add("submitted");
}
}
</script>
Demo here

instead of disabling pervent multiple submit by setting a javascript flag example :
<form method="post" id="ecomFormBean" name="ecomFormBean" onsubmit="return checkSubmit(this);" >
<input type="text" />
<input type="submit" />
</form>
<script>
var formSubmitted = false;
function checkSubmit(f){
if (formSubmitted) {
alert('Please be patient. Your order may take 10 - 15 seconds to process. Thank you!');
return false;
}
else return formSubmitted = true;
}
</script>

Chrome runs javascript very fast. So it might be possible your checkCreditDebit(buttonValues) function which is to disable submit button executes before your php script submits the form.
I suggest you to call setTimeOut function before calling the javascript function so that the form can get submitted.
Give it a try.

Preventing form submission after validation by parsley.js

I have used parsley.js many times and have literally copied the code from my last use of parsley.
However, every time I submit the form the page refreshes. preventDefault seems to work on my other pages and stops the page from refreshing but for some reason when I tried now it won't work. Can anyone figure out why not?
<script>
$(function(){
$("#register_signup").submit(function(e){
e.preventDefault();
var form = $(this);
if ($('#rform').parsley( 'isValid' )){
alert('valid');
}
});
});
</script>
<form id='rform' name='rform' data-parsley-validate>
<input id='reg_password' class='register_input' type='text' autocomplete="off" data-parsley-trigger="change" placeholder='Password' required>
<input id='reg_cpassword' class='register_input' type='text' name="reg_cpassword" placeholder='Confirm password' data-parsley-equalto="#reg_password" required>
<input id='register_signup' type="submit" onClick="javascript:$('#rform').parsley( 'validate' );" value='Sign Up' />
</form>

You are binding the submit event to a input element. If you check the jquery $.submit() documentation, it states that:
The submit event is sent to an element when the user is attempting to submit a form. It can only be attached to <form> elements. Forms can be submitted either by clicking an explicit <input type="submit">, <input type="image">, or <button type="submit">, or by pressing Enter when certain form elements have focus.
This is your main problem and this is why alert will never be displayed (in fact, that code is never executed).
I would also change a few things:
$('#rform').parsley( 'validate' ) should be $('#rform').parsley().validate(), assuming you are using Parsley 2.*
$('#rform').parsley( 'isValid' ) should be $('#rform').parsley().isValid().
Use $.on() instead of $.submit().
Remove onClickfrom the register_signup element. Since you are already using javascript, I would do this directly in the javascript code instead of onclick. This is more a personal preference.
So, your code will be something like this:
<form id='rform' name='rform'>
<input id='reg_password' class='register_input' type='text' autocomplete="off"
data-parsley-trigger="change" placeholder='Password' required>
<input id='reg_cpassword' class='register_input' type='text' name="reg_cpassword"
placeholder='Confirm password' data-parsley-equalto="#reg_password" required>
<input id='register_signup' type="submit" value='Sign Up' />
</form>
<script>
$(document).ready(function() {
$("#rform").on('submit', function(e){
e.preventDefault();
var form = $(this);
form.parsley().validate();
if (form.parsley().isValid()){
alert('valid');
}
});
});
</script>

if you are using parsely 2 you can try this
$(function () {
//parsely event to validate form -> form:valiate
$('#rform').parsley().on('form:validate', function (formInstance) {
//whenValid return promise if success enter then function if failed enter catch
var ok = formInstance.whenValid()
//on success validation
.then(function(){
alert('v');
formInstance.reset();
})
//on failure validation
.catch(function(){
formInstance.destroy();
});
$('.invalid-form-error-message')
.html(ok ? '' : 'You must correctly fill *at least one of these two blocks!')
.toggleClass('filled', !ok);
// console.log(formInstance);
if (!ok)
formInstance.validationResult = false;
console.log(formInstance);
});
//parsely event to submit form -> form:submit
$('#rform').parsley().on('form:submit', function (formInstance) {
// if you want to prevent submit in any condition after validation success -> return it false
return false;
});
//default submit still implemented but replaced with event form:submit
$('#rform').submit(function () {
alert('dd');
});
});
for more details parsely documentation check Form with examples and events

When you apply data-parsley-validate to your form, you don't need to apply javascript to form to stop submit until all validation run.
But if you applying javascript return false when parsely() not valid.
And just make sure you have include parsley.js code file.

How to create html5 custom validation?

I am using html 5 form validation for validate my form before submit, if is valid, submit, but I need validate my User Register form, so it need validate if Password Confirm value is equal camp Password, below is my form example:
<form>
<label>Login:</label>
<input type="text" name="login" id="login"/><br/>
<label>Password:</label>
<input type="password" name="pass" id="pass"/><br/>
<label>Password Confirm:</label>
<input type="password" name="pass_conf" id="pass_conf"/><br/>
<input type="submit"/>
</form>
or in jsfiddle
How to can I create my custom validation for work like default validations?

Well you can use JQuery and attach an attribute to be selected for the passwords to validate each other via input event. Use setCustomValidity() to set the message of the input affected to override the default message when the form is submitted.
See the updated fiddle.
As you can see in the fiddle, all you have to do is add an attribute data-equal-id wherein the attribute value must be the ID of password input element to be tested.
HTML
<h1>How to create html5 validation for password confirm?</h1>
<hr>
<form>
<label>Login:</label>
<input type="text" name="login" id="login"/><br/>
<label>Password:</label>
<input type="password" name="pass" id="pass"/><br/>
<label>Password Confirm:</label>
<input type="password" name="pass_conf" id="pass_conf" data-equal-id="pass" /><br/>
<input type="submit"/>
</form>
Javascript
$('[data-equal-id]').bind('input', function() {
var to_confirm = $(this);
var to_equal = $('#' + to_confirm.data('equalId'));
if(to_confirm.val() != to_equal.val())
this.setCustomValidity('Password must be equal');
else
this.setCustomValidity('');
});

you could try putting this code in your header:
<script>
document.getElementById('myform').onsubmit = function() {
if(!validateForm()){ // call your validation function
alert('fail!'); // remove this
return false; // prevent the form to submit
}
}
// your validation function
// compares that the passwords are equal
function validateForm(){
var pass = document.getElementById('pass').value;
var pass_conf = document.getElementById('pass_conf').value;
if(pass == pass_conf){
return true;
}else{
return false;
}
}
</script>
also put the id 'myform' to your form (or the name you want, but change it in the first line)

How about something fun like this using jQuery?
$('input[type="password"]').keyup(function() {
var pass=$('#pass').val();
var conf=$('#pass_conf').val();
if (pass == conf)
$('input[type="submit"]').removeAttr('disabled');
else
$('input[type="submit"]').attr('disabled', 'disabled');
});
The breakdown...
I am keying off of the keyup, so every time a key is pressed in the
password fields the function will fire.
I'm grabbing the value of both password fields, and comparing them.
If the values are the same, I'm enabling the submit button.
If the values are different, I'm disabling the submit button.
Pretty simple, but it works. Here is a demo: http://codepen.io/anon/pen/GxAyC/
(note - I added a couple of other visual enhancements to the demo to show what can be done)

You're using HTML5 for client-side form validation and wish to validate your form prior to form submission. Your form consists of three inputs and your only validation criteria is that both password fields match.
The most simple way to do this is to write a custom submit handler script:
const handleFormSubmit = (event) => {
event.preventDefault();
form = event.target;
if (form.pass === form.pass_conf) {
form.submit();
}
}
Above preventDefault() stops the default form submission behavior so you can execute your check. Then check if the value of the two password fields are equal. And if they are, continue form submission.
To use, attach the custom handler to your form by listening to the submit event:
const form = document.querySelector('form');
form.addEventListener('submit', handleFormSubmit);
Applied in context to example form provided:
<form>
<label>Login:</label>
<input type="text" name="login" id="login"/><br/>
<label>Password:</label>
<input type="password" name="pass" id="pass"/><br/>
<label>Password Confirm:</label>
<input type="password" name="pass_conf" id="pass_conf"/><br/>
<input type="submit"/>
</form>
<script>
const form = document.querySelector('form');
form.addEventListener('submit', handleFormSubmit);
const handleFormSubmit = (event) => {
event.preventDefault();
form = event.target;
if (form.pass.value === form.pass_conf.value) {
form.submit();
}
}
</script>

make a field mandatory using javascript

I am trying to make a select field mandatory on a web page. I know how to do it with help of JS and form attribute 'onsubmit' and returning the function. But the problem is that form code is already written and I dont know how to add attribute now. Let me know if I can append attribute dynamically from JS.
The other way I tried is to call the JS after page loaded. But this isnt making the field mandatory and form can be submitted.
Following is my code..
<!DOCTYPE html>
<html>
<head>
<script>
function f1()
{
var countryValue = document.getElementById('count ID').value;
if (countryValue == "")
{
alert("field value missing");
return false;
}
var stateValue = document.getElementById('state ID').value;
if (stateValue == "")
{
alert("state field value missing");
return false;
}
}
</script>
</head>
<body>
<form method = "post" action = "33.html">
Country: <input type="text" id="count ID">
state: <select id="state ID">
<option></option>
<option value="ap">ap</option>
<option value="bp">bp</option>
</select>
<br>
<input type = "submit">
</form>
<script>window.onload=f1</script>
</body>
</html>
Please help.

Have a look at this since you have messed up the IDs
Live Demo
window.onload=function() {
document.forms[0].onsubmit=function() { // first form on page
var countryValue = this.elements[0].value; // first field in form
if (countryValue == "") {
alert("Please enter a country");
return false;
}
var stateIdx = this.elements[1].selectedIndex; // second field
if (stateIdx < 1) { // your first option does not have a value
alert("Please select a state");
return false;
}
return true; // allow submission
}
}
PS: It is likely that POSTing to an html page will give you an error
To get the last button to do the submission
window.onload=function() {
var form = document.forms[0]; // first form
// last element in form:
form.elements[form.elements.length-1].onclick=function() {
...
...
...
this.form.submit(); // instead of return true
}
}

Once you've got a function to detect improper values (empty mandatory field or anything else, like a bad e-mail address for instance) you have a few different options :
disable the submit button
cancel the onclick event on the button
cancel the submit event on the form
disabling the submit button can be annoying for the user (it might flash on and off while the values are entered).

I had the same issue, but i made a extension. Using hook system to translate fields with "*", in the names, to validate like required field. This is a simple solution not intrusive where is not required addition of fields in the database, only by the use of sufix "*" in configuration of custom fields.
There is the code: https://github.com/voiski/bugzilla-required-field