I'm creating a login form and in that if any input is wrong then i want to stay on the same page and notify the client to enter the correct input
I want to stay on this page http://localhost:8080/loginpage/ but after every click i'm redirected to http://localhost:8080/loginpage/?UserName=UserName&pword=&ConfirmPassword=&Email=Email&FirstName=First+Name&LastName=Last+Name&cars=male&Signup=Signup .
I have written a code for this but it does not seem to work.
if(t!==0)
{
var er="Email-id already exists";
window.location.reload(false);
document.getElementById("nemail").value=er;
document.getElementById("username").value=username;
document.getElementById("pword").value="";
document.getElementById("confpwd").value="";
document.getElementById("fname").value=fname;
document.getElementById("lname").value=lname;
document.getElementById("gender").value=gender;
}
I have tried to use several other methods like
window.location.replace('/loginpage/');
window.location.href="/loginpage/index.html";
But none of them works.
Please help!
There are two ways to prevent a form to submit.
Set form onsubmit="return false".
Register a submit event on a from. In the callback call event.preventDefault();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>1 way to prevent form to submit via onclick attribute</h2>
<form action="#submit-from-1-way" onsubmit="return validate(this)"><!--set onsubmit="return false"-->
<input name="value"/>
<button type="submit">Submit</button>
</form>
<h2>2 way to prevent form to submit via submit event</h2>
<form id="form" action="#submit-from-2-way"><!--set onsubmit="return false"-->
<input name="value"/>
<button type="submit">Submit</button>
</form>
<script>
console.log(location.href+'#'+location.hash+'?'+location.search);
function validate(form) {
return $(form).find('input').val();
}
$('#form').submit(function (e) {
if (!validate(this)) e.preventDefault();
});
</script>
You can use preventDefault() on the click event for a given html object. This will prevent the browser from taking the default action on a specific HTML object.
For example to prevent actoin on a link:
<body>
Click Me
<script>
function dontGo(event) {
event.preventDefault();
}
document.getElementById("clickMe").addEventListener("click",dontGo);
</script>
</body>
I saw from W3C example something like this. An action happens on form submit(an alert). However, when I tried with my own function here, my action doesn't happen (show hidden div). Goal is to show hidden div on form submit using 'GET' request. I am new to javascript/jQuery/ajax, but isn't jQuery supposed make call to server without refreshing page?
not working javascript:
$(document).ready(function(){
$("form").submit(function showDiv(){
document.getElementById("showMe").style.display = "block";
});
});
not working html:
<body>
<form action="" method="GET">
<input type="text" name="LastName" value="Mouse"><br>
<input type="submit" value="Submit">
</form>
<div id="showMe" style="display: none;">
<p>hey this should be hidden</p>
</div>
</body>
You need to cancel the form submit before executing your code:
$(document).ready(function(){
$("form").submit(function(e){
// At this point you'll want to have some type of flag to indicate whether you
// should allow the form submission to continue, or cancel the event. For example,
// it could be whether not showMe is visible (I don't know what you're going for).
e.preventDefault();
$("#showMe").css("display", "block");
// Submit form after your code runs (or whenever you want)
$("form").submit();
});
});
$(document).ready(function(){
$("form").submit(function(e){
e.preventDefault(); // this will prevent the submit
document.getElementById("showMe").style.display = "block";
});
});
Actually the jfiddle you posted is not blocking the form, it shows you an alert that block all js execution (browser behavior), if you select ok in the alert, the form goes through
the event.preventDefault() statement means: don't process anything outside this function
Try this:
$("form").submit(function(e){
e.preventDefault();
$("#showMe").show();
});
You need at least one form element (button or input), that has type "submit".
Then jQuery .submit() or .on('submit',..) will definitely work.
I am using the jQuery plugin for notifications toastr js (http://codeseven.github.io/toastr/) and I am trying to add a contact form in the notification balloon and when submitted to use AJAX.
Even though that the form is working outside the toastr.info('') I can not make it happen in the script. when I click the submit, it refreshes the page.
How can i fix this ?
Ajax Script
$(function(){
$("#contactform").submit(function(event){
event.preventDefault();
$.post('mailme.php', $("#contactform").serialize(), function(data) {
});
});
});
HTML Form
<form id="contactform" method="post" name="myform">
<input name="phone" type="text"><input id="submit" name="Submit" type="submit" value="send">
</form>
toastr.info('I put the above HTML code in here')
Fiddle
http://jsfiddle.net/e0k6e0vc/2
Try unbinding submit at the end as below:
$("#contactform").on('submit',function(event){
event.preventDefault();
$.post('mailme.php', $("#contactform").serialize(), function(data) {
});
$("#contactform").unbind('submit');
return false;
});
UPDATE
Ok.. Since the form was dynamically getting added it wasn't identifying the submit event and hence below approach will do the work:
DEMO HERE
$(document).on('submit',"#contactform",function(event){
event.preventDefault();
$.post('mailme.php', $("#contactform").serialize(), function(data) {
});
$("#contactform").unbind('submit');
return false;
});
I have the following HTML and jquery:
<html dir="ltr" lang="en">
<head>
</head>
<body>
<h2>Test disabling submit button for 1 minute...</h2>
<br/>
<p style="text-align:center">
<form id="yourFormId" name="yourFormId" method="post" action="#">
<input type="submit" class="submitBtn" value="I Accept"/>
</form>
</p>
<!--script to disable the submit button -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<script type="text/javascript">
$(document).ready(function () {
$(".submitBtn").click(function () {
$(".submitBtn").attr("disabled", true);
return true;
});
});
</script>
<!--script ends here-->
</body>
</html>
As its stands the submit button gets disabled when pressed. However once pressed it does not seem perform the submit. If I removed the jquery to disable the button, the button then performs the submit normally.
How can I disable the button only after it has performed the submit? the current jquery above seems to conflict with the submit operation.
Any suggestions to resolve this issue would be extremely helpful.
Add the disable part in the submit event.
$(document).ready(function () {
$("#yourFormId").submit(function () {
$(".submitBtn").attr("disabled", true);
return true;
});
});
I faced the same problem. Customers could submit a form and then multiple e-mail addresses will receive a mail message. If the response of the page takes too long, sometimes the button was pushed twice or even more times..
I tried disable the button in the onsubmit handler, but the form wasn't submitted at all. Above solutions work probably fine, but for me it was a little bit too tricky, so I decided to try something else.
To the left side of the submit button, I placed a second button, which is not displayed and is disabled at start up:
<button disabled class="btn btn-primary" type=button id="btnverzenden2" style="display: none"><span class="glyphicon glyphicon-refresh"></span> Sending mail</button>
<button class="btn btn-primary" type=submit name=verzenden id="btnverzenden">Send</button>
In the onsubmit handler attached to the form, the 'real' submit is hidden and the 'fake' submit is shown with a message that the messages are being sent.
function checkinput // submit handler
{
..
...
$("#btnverzenden").hide(); <= real submit button will be hidden
$("#btnverzenden2").show(); <= fake submit button gets visible
...
..
}
This worked for us. I hope it will help you.
This solution has the advantages of working on mobile and being quite simple:
<form ... onsubmit="myButtonValue.disabled = true; return true;">
Hey this works,
$(function(){
$(".submitBtn").click(function () {
$(".submitBtn").attr("disabled", true);
$('#yourFormId').submit();
});
});
As a number of people have pointed out, disabling the submit button has some negative side effects (at least in Chrome it prevents the name/value of the button pressed from being submitted). My solution was to simply add an attribute to indicate that submit has been requested, and then check for the presence of this attribute on every submit. Because I'm using the submit function, this is only called after all HTML 5 validation is successful. Here is my code:
$("form.myform").submit(function (e) {
// Check if we have submitted before
if ( $("#submit-btn").attr('attempted') == 'true' ) {
//stop submitting the form because we have already clicked submit.
e.preventDefault();
}
else {
$("#submit-btn").attr("attempted", 'true');
}
});
Test with a setTimeout, that worked for me and I could submit my form, refers to this answer https://stackoverflow.com/a/779785/5510314
$(document).ready(function () {
$("#btnSubmit").click(function () {
setTimeout(function () { disableButton(); }, 0);
});
function disableButton() {
$("#btnSubmit").prop('disabled', true);
}
});
Reading the comments, it seems that these solutions are not consistent across browsers.
Decided then to think how I would have done this 10 years ago before the advent of jQuery and event function binding.
So here is my retro hipster solution:
<script type="text/javascript">
var _formConfirm_submitted = false;
</script>
<form name="frmConfirm" onsubmit="if( _formConfirm_submitted == false ){ _formConfirm_submitted = true;return true }else{ alert('your request is being processed!'); return false; }" action="" method="GET">
<input type="submit" value="submit - but only once!"/>
</form>
The main point of difference is that I am relying on the ability to stop a form submitting through returning false on the submit handler, and I am using a global flag variable - which will make me go straight to hell!
But on the plus side, I cannot imagine any browser compatibility issues - hey, it would probably even work in Netscape!
This is the edited script, hope it helps,
<script type="text/javascript">
$(function(){
$("#yourFormId").on('submit', function(){
return false;
$(".submitBtn").attr("disabled",true); //disable the submit here
//send the form data via ajax which will not relaod the page and disable the submit button
$.ajax({
url : //your url to submit the form,
data : { $("#yourFormId").serializeArray() }, //your data to send here
type : 'POST',
success : function(resp){
alert(resp); //or whatever
},
error : function(resp){
}
});
})
});
</script>
I put this in my global code to work on all submit buttons:
$("input[type='submit']").on("click", function (e) {
$(this).attr("disabled", true);
$(this).closest("form").submit()
});
My problem was solved when i add bind section to my script file.
Totally i did this 2 steps :
1 - Disable button and prevent double submitting :
$('form').submit(function () {
$(this).find(':submit').attr('disabled', 'disabled');
});
2 - Enable submit button if validation error occurred :
$("form").bind("invalid-form.validate", function () {
$(this).find(':submit').prop('disabled', false);
});
Not that I recommend placing JavaScript directly into HTML, but this works in modern browsers (not IE11) to disable all submit buttons after a form submits:
<form onsubmit="this.querySelectorAll('[type=submit]').forEach(b => b.disabled = true)">
I went through a lot of solutions for my problem statement and I think most of the people here are also answering the same.
Generally, when you do a server side form submit, there is a chance of user clicking the button multiple times which leads to multiple submissions. So, to prevent that, the button should be disabled after the first submit. This is what worked for me in the most elegant way.
We have a form submit event <form onsubmit="onFormSubmitted()"></form>.
In onFormSubmitted() disable your submit button or do any operations required.
Handing this way retains your html validations as well as it disables the button once the form submit is triggered when first click of button takes place.
function onSubmit() {
$('.btn_submit').attr('disabled', true);
}
<form class="contact_form" method="POST" autocomplete="off" onsubmit="onSubmit()">
<input name="email" id="email">
<button class="btn_submit" type="submit">Submit</button>
</form>
Alternatively, you can also make global form submit handler for forms throughout the project.
$('form').on('submit', function() {
$(this).find(":submit").prop('disabled', true);
});
$(document).ready(function() {
$(body).submit(function () {
var btn = $(this).find("input[type=submit]:focus");
if($(btn).prop("id") == "YourButtonID")
$(btn).attr("disabled", "true");
});
}
$(function(){
$("input[type='submit']").click(function () {
$(this).attr("disabled", true);
});
});
thant's it.
I want to prevent a form from being submitted using jQuery and instead run a function when the user wants to submit.
Here's my forms markup:
<form action="" method="post" id="msg-form">
<p><textarea name="msg"></textarea><input type="submit" value="Send"></p>
</form>
And my Javascript code:
$('#msg-form').submit(function() {
return false;
}
However, when I press the submit button, the form still gets sent and the page refreshes. How can I properly prevent the form from submitting?
It seems the event handler is not even executed, thus I assume the form could not have been found. Try enclosing your code within handler executed when the DOM is ready. In jQuery it can be simply done like that:
$(function(){
$('#msg-form').submit(function(event) {
event.preventDefault();
// code executed when user tries to submit the form
});
});
Also, as you can see above, you can prevent default behaviour of the form when it is being submitted.
The submit event is not actually being bound to the form element. You may have forgotten to bind it after the DOM was loaded!
Put the event binding inside of $(document).ready(function() { or load the script at the bottom of the page (after all of the elements have loaded).
$('#msg-form').submit(function(e){
e.preventDefault();
});
You could not give the users a real submit button and only submit the form using JS after validation:
HTML
<form action="" method="post" id="msg-form">
<p><textarea name="msg"></textarea><input id="submit" type="button" value="Send"></p>
</form>
JS
$('#submit').on('click', function() {
// validate
$('#msg-form')[0].submit();
});
Try:
$("#msg-form").submit(function (e) {
e.preventDefault();
});
This works
<form action='' onsubmit="return false;">
As does this
<form action='' onsubmit="doSomeWork();return false;">