Stop queue of functions attached to submit event - javascript

I have a form and there are 2 different functions attached to it's submit event (see code below).
// #1. that part of code does basic client side validation
form.addEventListener('submit', function(event) {
if (form.checkValidity() === false) {
event.preventDefault();
event.stopPropagation();
}
});
// #2. ajax request based on filled data on form
form.addEventListener('submit', function(event) {
event.preventDefault();
$.post(...); // AJAX request
});
What I want is to avoid AJAX logic (function #2) if validation (function #1) has not passed.
Is it possible to stop queue and if so - how can I do that?
Thanks

You have to merge the 2 functions in a single one, like this:
form.addEventListener('submit', function(event) {
if (form.checkValidity() === false) {
event.preventDefault();
event.stopPropagation();
} else {
$.post(...); // AJAX request
}
});
or in a shorter way:
form.addEventListener('submit', function(event) {
if (form.checkValidity() === true) {
$.post(...); // AJAX request
}
});

Related

Where to Input the function I want to run in Bootstrap JS

I want to use the below JS in my web app to not allow the information to process unless all fields have information in them. Where or how do I insert the function to run if all fields are full?
// Example starter JavaScript for disabling form submissions if there are invalid fields
(function () {
'use strict'
// Fetch all the forms we want to apply custom Bootstrap validation styles to
var forms = document.querySelectorAll('.needs-validation')
// Loop over them and prevent submission
Array.prototype.slice.call(forms)
.forEach(function (form) {
form.addEventListener('submit', function (event) {
if (!form.checkValidity()) {
event.preventDefault()
event.stopPropagation()
}
form.classList.add('was-validated')
}, false)
})
})()
since if check if its not valid then you can add else if you want you do something if its valid.
if (!form.checkValidity()) {
event.preventDefault()
event.stopPropagation()
} else {
// code here
}

stop function that passes parameters in Javascript

Currently I am using this function to validate if the inputs within a form are complete, but the problem is that when using this function a parameter pass is performed.
(function() {
'use strict';
window.addEventListener('load', function() {
// Fetch all the forms we want to apply custom Bootstrap validation styles to
var forms = document.getElementsByClassName('needs-validation');
// Loop over them and prevent submission
var validation = Array.prototype.filter.call(forms, function(form) {
form.addEventListener('submit', function(event) {
if (form.checkValidity() === false) {
event.preventDefault();
event.stopPropagation();
}else{
funcion_upp_data();
Breaker();
}
form.classList.add('was-validated');
}, false);
});
}, false);
})();
my url:
when I click, my url changes and it's done like this:
that you should modify in the function so that this change is not made in the url.

bootstrap 4 call javascript function on form validation

So I'm using Bootstrap 4 for my project, and I really like the way their validation works for each input element in a form. I'm using this code to validate my form, this was off their website:
<script>
(function () {
"use strict";
window.addEventListener(
"load",
function () {
// Fetch all the forms we want to apply custom Bootstrap validation styles to
var forms = document.getElementsByClassName("needs-validation");
// Loop over them and prevent submission
var validation = Array.prototype.filter.call(forms, function (form) {
form.addEventListener(
"submit",
function (event) {
if (form.checkValidity() === false) {
event.preventDefault();
event.stopPropagation();
}
form.classList.add("was-validated");
},
false
);
});
},
false
);
})();
</script>
The only thing is, in my javascript file, I have another listener that's supposed to get fired when the sign-up button is submitted inside my form. For whatever reason, even once all the input fields are validated, I can't get it to call my submit function. Here's the code inside my javascript file:
document.addEventListener("DOMContentLoaded", function() {
initApp();
});
function initApp() {
document.querySelector("#sign-up").addEventListener("submit", createAccount, false);
}
function createAccount() {
alert('test');
}
I've tried a bunch of stuff like moving this validation code before and after the initialization of my js file, but nothing worked. The goal is to have 2 submit buttons in this form (one is sign up, other is log in) and depending which one is pressed, a different function should be called. If anyone has any ideas, I'd appreciate it!
So if anyone was interested, I fixed my problem by changing the button from submit to a regular button and running validation through my own code. Here's the fiddle of it: https://jsfiddle.net/bv84ncz5/
var forms = document.getElementsByClassName("needs-validation");
// Loop over them and prevent submission
var validation = Array.prototype.filter.call(forms, function(form) {
form.classList.add("was-validated");
});
let password = document.querySelector("#password");
let email = document.querySelector("#email");
if (password.checkValidity() === true && email.checkValidity() === true) {
alert("sup");
}
The only thing you need for Bootstrap validation to work is add the class was-validated to each input in the form. Then, you can check if all the forms you want are valid with checkValidity(), and then carrying out what else you want to do
As I stated in my comment, I'm not sure what are you doing wrong, must be something. Check this scriptlet working, I changed nothing from you code, I just put it together.
document.addEventListener("DOMContentLoaded", function() {
initApp();
});
function initApp() {
document.querySelector("#sign-up").addEventListener("submit", createAccount, false);
}
(function () {
"use strict";
window.addEventListener(
"load",
function () {
// Fetch all the forms we want to apply custom Bootstrap validation styles to
var forms = document.getElementsByClassName("needs-validation");
// Loop over them and prevent submission
var validation = Array.prototype.filter.call(forms, function (form) {
form.addEventListener(
"submit",
function (event) {
if (form.checkValidity() === false) {
event.preventDefault();
event.stopPropagation();
}
form.classList.add("was-validated");
},
false
);
});
},
false
);
})();
function createAccount() {
alert('test');
}
<form id="sign-up">
<input type="text" class="needs-validation" />
<input type="submit" />
</form>

Wizard Form not submitting

Wizard form is not submitting. Originally configured to give a notification when there are no errors instead of submitting. I want the form to submit. I therefore modified original code to as below
$w4finish.on('click', function(ev) {
ev.preventDefault();
var validated = $('#w4 form').valid();
if (validated) return true;
this.submit();
});
But it is still not submitting.
At this point fires return and further code is not executed.
if (validated) { return true }
Remove this line if not needed or change function to this one:
$w4finish.on('click', function(ev) {
ev.preventDefault();
var validated = $('#w4 form').valid();
if (validated) {
this.submit();
return true;
}
});

jQuery: Stop submitting form, perform script, continue submitting form?

I have a form, and when I submit him I execute multiple script. Here is my code:
$("#RequestCreateForm").submit(function (e) {
if ($("#RequestCreateForm").validate().checkForm() == false) { return; }
e.preventDefault();
//many scripts
//How to continue submitting?
}
Is it possible to continue submitting the form (which is stopped with e.preventDefault();) after //many scripts?
Thank you
When you call $("#RequestCreateForm").submit(), the script will just run through the event handler again, and cause an infinite loop (as Koen pointed out in a comment on the accepted answer). So, you need to remove the event handler before submitting:
$("#RequestCreateForm").on('submit', function (e) {
e.preventDefault();
// do some stuff, and if it's okay:
$(this).off('submit').submit();
});
The last line needs to be in a conditional statement, otherwise it'll just always happen, and negate your e.preventDefault(); at the top.
$("#RequestCreateForm").submit(function (e) {
if ($("#RequestCreateForm").validate().checkForm() === false) {
e.preventDefault();
//form was NOT ok - optionally add some error script in here
return false; //for old browsers
} else{
//form was OK - you can add some pre-send script in here
}
//$(this).submit();
//you don't have to submit manually if you didn't prevent the default event before
}
$("#RequestCreateForm").submit(function (e) {
if ($("#RequestCreateForm").validate().checkForm() == false)
{
e.preventDefault();
return false;
}
//other scripts
}
All solutions here are too complicated or lead to javascript error, simpliest and clearest solution I guess:
jQuery("#formid").submit(function(e) {
if( ! (/*check form*/) ){ //notice the "!"
e.preventDefault();
//a bit of your code
} //else do nothing, form will submit
});
$("#RequestCreateForm").submit(function (e) {
if ($("#RequestCreateForm").validate().checkForm() == false) { return; }
e.preventDefault();
//many scripts
// Bypass the jquery form object submit and use the more basic vanilla
// javascript form object submit
$("#RequestCreateForm")[0].submit();
}
To avoid submit loops, an additional variable should be used.
var codeExecuted = false;
$('#RequestCreateForm').submit(function(e) {
...
if(!codeExecuted){
e.preventDefault();
...
functionExecuted = true;
$(this).trigger('submit');
}
});
Here is my approach to avoid the infinite loop.
In the form, I use a "button" with an id (e.g. <input type="button" id="submit" value="submit"/>) to mimic the submit button;
In the script I have something like this:
$('#submit').click(function() {
if(//validation rules is ok)
{
$("#RequestCreateForm").submit(); //assuming the form id is #RequestCreateForm
}
else
{
return false;
}
});
return; is the same thing as e.preventDefault();
try
$("#RequestCreateForm").trigger('submit');

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