I know that it is possible to submit POST request to an iframe by using target attribute.
Is there any way to submit POST request from one form to multiple iframes at the same time?
Both HTML and JS solutions are acceptable.
A Javascript solution would be your best bet.
<form id="form">
<input type="text" name="xyz" value="random data" />
<button type="submit">Go</button>
</form>
In JS, you would attach an event listener to your form when it is submitted. The listener would trigger a function that could send the form data to multiple targets:
var form = document.getElementById("form");
if(form.attachEvent) {
form.attachEvent("submit", submitForm);
} else {
form.addEventListener("submit", submitForm);
}
function submitForm(e) {
if(e.preventDefault) {
e.preventDefault();
}
this.target = "first_iframe";
this.submit();
var secondForm = this.cloneNode();
secondForm.target = "second_iframe";
secondForm.submit();
}
Related
There seems to be lots of info on how to submit a form using javascript, but I am looking for a solution to capture when a form has been submitted and intercept it in javascript.
HTML
<form>
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
When a user presses the submit button, I do not want the form to be submitted, but instead I would like a JavaScript function to be called.
function captureForm() {
// do some stuff with the values in the form
// stop form from being submitted
}
A quick hack would be to add an onclick function to the button but I do not like this solution... there are many ways to submit a form... e.g. pressing return while on an input, which this does not account for.
Ty
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
In JS:
function processForm(e) {
if (e.preventDefault) e.preventDefault();
/* do what you want with the form */
// You must return false to prevent the default form behavior
return false;
}
var form = document.getElementById('my-form');
if (form.attachEvent) {
form.attachEvent("submit", processForm);
} else {
form.addEventListener("submit", processForm);
}
Edit: in my opinion, this approach is better than setting the onSubmit attribute on the form since it maintains separation of mark-up and functionality. But that's just my two cents.
Edit2: Updated my example to include preventDefault()
You cannot attach events before the elements you attach them to has loaded
It is recommended to use eventListeners - here one when the page loads and another when the form is submitted
This works since IE9:
Plain/Vanilla JS
// Should only be triggered on first page load
console.log('ho');
window.addEventListener("DOMContentLoaded", function() {
document.getElementById('my-form').addEventListener("submit", function(e) {
e.preventDefault(); // before the code
/* do what you want with the form */
// Should be triggered on form submit
console.log('hi');
})
});
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
jQuery
// Should only be triggered on first page load
console.log('ho');
$(function() {
$('#my-form').on("submit", function(e) {
e.preventDefault(); // cancel the actual submit
/* do what you want with the form */
// Should be triggered on form submit
console.log('hi');
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
Not recommended but will work
If you do not need more than one event handler, you can use onload and onsubmit
// Should only be triggered on first page load
console.log('ho');
window.onload = function() {
document.getElementById('my-form').onsubmit = function() {
/* do what you want with the form */
// Should be triggered on form submit
console.log('hi');
// You must return false to prevent the default form behavior
return false;
}
}
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
<form onSubmit="return captureForm()">
that should do. Make sure that your captureForm() method returns false.
Another option to handle all requests I used in my practice for cases when onload can't help is to handle javascript submit, html submit, ajax requests.
These code should be added in the top of body element to create listener before any form rendered and submitted.
In example I set hidden field to any form on page on its submission even if it happens before page load.
//Handles jquery, dojo, etc. ajax requests
(function (send) {
var token = $("meta[name='_csrf']").attr("content");
var header = $("meta[name='_csrf_header']").attr("content");
XMLHttpRequest.prototype.send = function (data) {
if (isNotEmptyString(token) && isNotEmptyString(header)) {
this.setRequestHeader(header, token);
}
send.call(this, data);
};
})(XMLHttpRequest.prototype.send);
//Handles javascript submit
(function (submit) {
HTMLFormElement.prototype.submit = function (data) {
var token = $("meta[name='_csrf']").attr("content");
var paramName = $("meta[name='_csrf_parameterName']").attr("content");
$('<input>').attr({
type: 'hidden',
name: paramName,
value: token
}).appendTo(this);
submit.call(this, data);
};
})(HTMLFormElement.prototype.submit);
//Handles html submit
document.body.addEventListener('submit', function (event) {
var token = $("meta[name='_csrf']").attr("content");
var paramName = $("meta[name='_csrf_parameterName']").attr("content");
$('<input>').attr({
type: 'hidden',
name: paramName,
value: token
}).appendTo(event.target);
}, false);
Use #Kristian Antonsen's answer, or you can use:
$('button').click(function() {
preventDefault();
captureForm();
});
I am trying to check if all form fields are filled on click a button & if valid then i am trying to add a check an alert using jquery.
jQuery("button#btn_place_order").click(function(event){
jQuery("form").validate({
submitHandler: function(form) {
alert('ok');
}
});
});
This is what i have tried but its not working, i just want to check if all fields are ok valid & filled & there is no form related error then just console or alert to check. Webpage has two or more html forms. Is their any way we can check using jquery ?
Thanks
First of you will have to prevent the default behavior of a form submit. Afterwards add a event listener to your button and check for validation of each input. (whatever that means for you). Is this what you wanted?
var el = document.getElementById("form");
el.addEventListener("submit", function(event) {
event.preventDefault();
}, true);
document.getElementById("btn").addEventListener("click", validate);
function validate(){
let valid = true;
[...document.getElementById("form").elements].forEach((input) => {
if(input.value.length == 0){
valid = false;
}
});
if(valid) alert("valid");
}
<form id="form">
<input type="text" name="TEST" id="test">
</form>
<button class="button" name="Send" value="Send" id="btn">Check</button>
Having a simple form with two submit buttons, how can I get the formaction attribute in a submit event?
HTML code:
<form id="FORM" action="/original">
<input type="text">
</form>
<button form="FORM">original</button>
<button form="FORM" formaction="/formaction">formaction</button>
When submitting using formaction button action of the form is still original in the event.
You can get the overridden form action by grabbing the element which currently has focus (after the submit event was sent) using document.activeElement
You can see if a formaction override is attached to the button that sent the submit event, otherwise if there is none, then use the original action
document.getElementById("FORM").addEventListener("submit", handleForm);
function handleForm(e) {
e.preventDefault(); // for this example only
let formAction = e.target.getAttribute("action");
let activeElementAction = document.activeElement.getAttribute("formaction");
let action = activeElementAction || formAction;
console.log(action);
}
<form id="FORM" action="/original">
<input type="text">
</form>
<button form="FORM">original</button>
<button form="FORM" formaction="/formaction">formaction</button>
You can use submitter property of SubmitEvent and check that formaction attribut is filled
https://developer.mozilla.org/en-US/docs/Web/API/SubmitEvent
This property is referenced in originalEvent property of JQuery submit event
var submitter = $(event.originalEvent.submitter)
if (submitter.attr('formaction')) {
...
} else {
...
}
Hi I have 2 submit buttons within one form. The script below works to help prevent empty fields from being submitted by sending an alert msg to the user. However I only need it to run with one of my two submit buttons is clicked. So in other words if one button a if clicked it would submit the form with or without blank fields, and the other button would run the script below and not allow the form to be submitted with blank fields. Any help is greatly appreciated, Thanks.
<script type="text/javascript">
$('form').on('submit', function () {
var thisForm = $(this);
var thisAlert = thisForm.data('alert');
var canSubmit = true;
thisForm.find('[data-alert]').each(function(i) {
var thisInput = $(this);
if ( !$.trim(thisInput.val()) ) {
thisAlert += '\n' + thisInput.data('alert');
canSubmit = false;
};
});
if( !canSubmit ) {
alert( thisAlert );
return false;
}
});
</script>
Instead of wiring up to the form submit event, wire up to the click event of the button that you want to validate with. Returning true from a click event will allow the submit to occur, and false will block it.
You have one form and two submit buttons which, by default, will both submit the form. To prevent one button from submitting, add a click handler that both prevents the default submit action and does whatever else you want that button to do.
HTML
<form id="form">
<input type="text" value="something" />
<input id="submit1" type="submit" value="send" />
<input id="submit2" type="submit" value="ignore" />
</form>
JavaScript
$('#submit2').on('click', function (event) {
event.preventDefault();
// Form will not be submitted
// Do whatever you need to do when this button is clicked
});
$('form').on('submit', function () {
var thisForm = $(this);
var thisAlert = thisForm.data('alert');
var canSubmit = true;
thisForm.find('[data-alert]').each(function(i) {
var thisInput = $(this);
if ( !$.trim(thisInput.val()) ) {
thisAlert += '\n' + thisInput.data('alert');
canSubmit = false;
};
});
if( !canSubmit ) {
alert( thisAlert );
return false;
}
});
Demo https://jsfiddle.net/BenjaminRay/dqqfLxav/
You may try adding the click event and adding classes to the submit buttons. So you know which button click will submit the form accordingly.
$('form button').click(function(){
if($(this).hasClass('.submit-without-validation')) {
$('form').submit();
}
if($(this).hasClass('.submit-with-validation')) {
//Do your validation and then submit
}
});
There are so many answered that you can use to achieve what you want. And you can try this one also. Here is some explanation. Basically, you need can use html5 data attribute to set the value to differentiate both button. When the button was clicked, you can check the value using condition as following code :
HTML
<form>
<input type="text" value="" id="name"/>
<input type="submit" class="btn_submit" value="Submit validate" data-valid="yes"/>
<input type="submit" class="btn_submit" value="Submit without validate" data-valid="no"/>
</form>
JS
$(document).on('click', '.btn_submit', function(e){
e.preventDefault();
var data_valid = $(this).data('valid');
if(data_valid == "yes")
{
// doing your stuff here for validation like example below
var input = $('#name').val();
if(input=="")
{
alert('required');
return;
}
// After the validation process finish, submit the form
$('form').submit();
}
else
{
// submit without validation
$('form').submit();
}
});
There seems to be lots of info on how to submit a form using javascript, but I am looking for a solution to capture when a form has been submitted and intercept it in javascript.
HTML
<form>
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
When a user presses the submit button, I do not want the form to be submitted, but instead I would like a JavaScript function to be called.
function captureForm() {
// do some stuff with the values in the form
// stop form from being submitted
}
A quick hack would be to add an onclick function to the button but I do not like this solution... there are many ways to submit a form... e.g. pressing return while on an input, which this does not account for.
Ty
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
In JS:
function processForm(e) {
if (e.preventDefault) e.preventDefault();
/* do what you want with the form */
// You must return false to prevent the default form behavior
return false;
}
var form = document.getElementById('my-form');
if (form.attachEvent) {
form.attachEvent("submit", processForm);
} else {
form.addEventListener("submit", processForm);
}
Edit: in my opinion, this approach is better than setting the onSubmit attribute on the form since it maintains separation of mark-up and functionality. But that's just my two cents.
Edit2: Updated my example to include preventDefault()
You cannot attach events before the elements you attach them to has loaded
It is recommended to use eventListeners - here one when the page loads and another when the form is submitted
This works since IE9:
Plain/Vanilla JS
// Should only be triggered on first page load
console.log('ho');
window.addEventListener("DOMContentLoaded", function() {
document.getElementById('my-form').addEventListener("submit", function(e) {
e.preventDefault(); // before the code
/* do what you want with the form */
// Should be triggered on form submit
console.log('hi');
})
});
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
jQuery
// Should only be triggered on first page load
console.log('ho');
$(function() {
$('#my-form').on("submit", function(e) {
e.preventDefault(); // cancel the actual submit
/* do what you want with the form */
// Should be triggered on form submit
console.log('hi');
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
Not recommended but will work
If you do not need more than one event handler, you can use onload and onsubmit
// Should only be triggered on first page load
console.log('ho');
window.onload = function() {
document.getElementById('my-form').onsubmit = function() {
/* do what you want with the form */
// Should be triggered on form submit
console.log('hi');
// You must return false to prevent the default form behavior
return false;
}
}
<form id="my-form">
<input type="text" name="in" value="some data" />
<button type="submit">Go</button>
</form>
<form onSubmit="return captureForm()">
that should do. Make sure that your captureForm() method returns false.
Another option to handle all requests I used in my practice for cases when onload can't help is to handle javascript submit, html submit, ajax requests.
These code should be added in the top of body element to create listener before any form rendered and submitted.
In example I set hidden field to any form on page on its submission even if it happens before page load.
//Handles jquery, dojo, etc. ajax requests
(function (send) {
var token = $("meta[name='_csrf']").attr("content");
var header = $("meta[name='_csrf_header']").attr("content");
XMLHttpRequest.prototype.send = function (data) {
if (isNotEmptyString(token) && isNotEmptyString(header)) {
this.setRequestHeader(header, token);
}
send.call(this, data);
};
})(XMLHttpRequest.prototype.send);
//Handles javascript submit
(function (submit) {
HTMLFormElement.prototype.submit = function (data) {
var token = $("meta[name='_csrf']").attr("content");
var paramName = $("meta[name='_csrf_parameterName']").attr("content");
$('<input>').attr({
type: 'hidden',
name: paramName,
value: token
}).appendTo(this);
submit.call(this, data);
};
})(HTMLFormElement.prototype.submit);
//Handles html submit
document.body.addEventListener('submit', function (event) {
var token = $("meta[name='_csrf']").attr("content");
var paramName = $("meta[name='_csrf_parameterName']").attr("content");
$('<input>').attr({
type: 'hidden',
name: paramName,
value: token
}).appendTo(event.target);
}, false);
Use #Kristian Antonsen's answer, or you can use:
$('button').click(function() {
preventDefault();
captureForm();
});