How to avoid page reload in php form submission - javascript

I am currently using php in my html page and there is an action in the same page which gets executed upon form submission. Currently whole form gets reloaded while I want the php action to be run in the background with out reloading. How do I do it. I would also want to clear the text box after submit button is clicked. Following is the code I am currently using
<html>
<head>
</head>
<body>
<form action="index.php" method="post" role="form">
<input type="email" placeholder="Enter email" name="email_address">
<button class="btn btn-primary custom-button red-btn">Sign Up</button>
</form>
<?php
if(isset($_POST['email_address']) !(trim($_POST['email_address']) == ''))
// do some action
}
?>
</body>
</html>
Note: Following code worked for me
<script type="text/javascript">
$('#contactForm').submit(function () {
$.post("mailer.php",$("#contactForm").serialize(), function(data){
});
return false;
});
</script>

You need to use AJAX for this, for without reloading. Or, if you want to do it without disturbing the page, you need to set target.
Using AJAX
$("form").submit(function(){
$.post($(this).attr("action"), $(this).serialize());
return false;
});
Using target
<form action="index.php" method="post" role="form" target="_blank">

Using ajax
HTML
<html>
<head>
</head>
<body>
<form id="myform"><!--changge-->
<input type="email" placeholder="Enter email" name="email_address">
<button class="btn btn-primary custom-button red-btn" id="signup">Sign Up</button>
</form>
</body>
</html>
<script>
$(document).ready(function()
{
$('#signup').click(function()
{
$.ajax({
url:'index.php',
method:'post',
data : $('#myform').serialize(),
success:function()
{
}
)};
);
});
</script>

You can try this
<html>
<head>
</head>
<body>
<form id="myform" action="index.php"><!--changge-->
<input type="email" placeholder="Enter email" name="email_address">
<button class="btn btn-primary custom-button red-btn" id="signup">
Sign Up</button>
</form>
<script>
$(document).ready(function(){
$('#signup').click(function(){
$.post($(this).attr("action"), $("#myform").serialize(),function(response){
alert(response) // you can get the success response return by php after submission success
});
)};
});

Related

Form submit function not working

This is my basic html page.
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
</head>
<body >
<form id="#forgotform">
<input type="email" id="email" placeholder="Enter your email" required="required" />
<input type="submit" value="submit" />
</form>
</body>
<script>
$(document).ready(function(){
$('#forgotform').on('submit', function() {
alert('You submitted the form!');
});
});
</script>
</html>
I am trying to do something on submit form #forgotform, but it is not even triggering an alert on submitting the form. Please help me out.
replace <form id="#forgotform"> this with <form id="forgotform">.May be this will work.
Remove the '#' from the <form id="#forgotform">. There is no need to put '#' while adding id to an element in HTML.
You can also try this
$("#form-id").submit(function(){
alert("Submitted");
});
Your HTML Form
<form id="form-id">..</form>

Replace div after form submit

<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#submit").click(function(){
$("#p").replaceWith($("#p1"));
});
});
</script>
</head>
<body>
<div id="p">This is a paragraph.</div>
<div id="p1">Replacement</div>
<form action="" method="get">
<input type="submit" id="submit" name="submit" value="Search"/>
</form>
</body>
</html>
This code works fine until I put form action.. When I keep that submit in a form, this code does not work. How can i replace that div after form submit. Thanks.
You can try this one. Hope it helps!
$(document).ready(function(){
$("#submit").click(function(event){
$("#p").replaceWith($("#p1").text());
return false;
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<div id="p">This is a paragraph.</div>
<div id="p1">Replacement</div>
<form action="" method="get">
<input type="submit" id="submit" name="submit" value="Search"/>
</form>
you need text method for that .
you were removing entire element before . you need to remove only text value
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#submit").click(function(){
$("#p").replaceWith($("#p1").text());
});
});
</script>
</head>
<body>
<div id="p">This is a paragraph.</div>
<div id="p1">Replacement</div>
<input type="submit" id="submit" name="submit" value="Search"/>
</body>
</html>
Specify what to replace it with:
$(this).replaceWith("<div><p>Replacement</p></div>");
Form submission needs to be done using AJAX then only you can achieve this which you want to do.
Otherwise the form will submit and page will refresh which will result to re initialization of script.
As Pooojaaqaa and Rayon mention the when the action attribute is set on the form tag, the form is submitted and the page is reloaded (even if action="#"). To catch this action you need to catch the form's submit event, not the button's click event. In the submit event handler you need to call preventDefault() on the event object passed into the handling function like below.
<form id="frmSearch" action="#" method="get">
<input type="submit" id="submit" name="submit" value="Search"/>
</form>
$("#frmSearch").submit(function(ev){
ev.preventDefault();
$("#p").replaceWith($("#p1").text());
});

Required attribute not working using javascript submit

I make some form different action within different button
<form id="form" method="post" class="form-horizontal" enctype="multipart/form-data">
<input name="name" class="form-control" type="text" required>
</form>
<button type="button" class="btn btn-primary" onClick="submitForm('<?php echo base_url('order/add');?>')">Submit</button>
<button type="button" class="btn btn-warning" onClick="submitForm('<?php echo base_url('order/print');?>')">Print</button>
Javascript
function submitForm(action)
{
document.getElementById('form').action = action;
document.getElementById('form').submit(
);
}
Then, my required attribute not working. Did I do something wrong? Let me know if there is other solution.
Thanks,
I can't give you a good explanation but you need the submit buttons inside the form.
So if you would have a button like:
<input type="submit" value="Submit">,
it will trigger the required attribute.
#Remn If you would still stay on your structure with submit inside a function you could trigger yourself the validation like:
if ($("form")[0].checkValidity())
{
$("form").submit()
}
and then do something with inputs that are invalid by passing through each required element ( input is set in code ):
$('form :input[required="required"]').each(function()
{
if(!this.validity.valid)
{
$(this).focus();
// break
return false;
}
});
In the below case the invalid inputs will be focused one by one.
The whole code is:
$( function () {
$("body").on("click", "#trigger", function() {
if ($("form")[0].checkValidity())
{
$("form").submit()
}
$('form :input[required="required"]').each(function()
{
if(!this.validity.valid)
{
$(this).focus();
// break
return false;
}
});
});
});
Where #trigger is an id I set on the button to submit, you can make your own functions to achieve your goal I just used on().
I hope it helps!
Please try bellow code. i hope solve your problem.
<html>
<head>
<title>Submit</title>
<script type="text/javascript" language="javascript">
function submitForm(action)
{
document.getElementById('form').action = action;
document.getElementById('form').submit(
);
//alert(document.getElementById('form').action);
}
</script>
</head>
<body>
<form id="form" method="get" class="form-horizontal" enctype="multipart/form-data">
<input name="name" class="form-control" type="text" required="required">
<button type="submit" class="btn btn-primary" onclick="return submitForm('<?php echo base_url('order/add');?>');" id="submit">Submit</button>
<button type="submit" class="btn btn-warning" onclick="return submitForm('<?php echo base_url('order/print');?>');" id="print">Print</button>
</form>
</body>
</html>
I have test your code by adding Javascript part in Script tag it is working fine. And i tested it on Chrome Windows 10.
<form id="form" method="post" class="form-horizontal" enctype="multipart/form-data">
<input name="name" class="form-control" type="text" required>
</form>
<button type="button" class="btn btn-primary" onClick="submitForm('<?php echo base_url('order/add'); ?>')">Submit</button>
<button type="button" class="btn btn-warning" onClick="submitForm('<?php echo base_url('order/print'); ?>')">Print</button>
<script>
function submitForm(action) {
document.getElementById('form').action = action;
document.getElementById('form').submit();
}
</script>
Using javascript's form.submit() function will cause input validation to be bypassed (according to the HTML specification in point 4 of the form submission algorithm). The only way to trigger HTML input validation is to use a click event on a submit button inside the form, either by the user actually clicking, or in javascript with something like form.querySelector('input[type="submit"]').click().

click function is not working on button

i am trying to make a list and submit button and the user enters the list size and then after clicking on a button the form is submitted (list size is sent to the servlet ) and an alert should appear .. but the alert is not working .. here is my code
<body>
<form action="ServerSide" method="post">
Enter list Size:<input type="text" name="listsize">
<input type="submit" value="Submit" id="btn">
</form>
<script type="text/javascript">
$(document).ready(function(){
$("#btn").click(function(){
alert("anything");
});
});
</script>
</body>
You can try this:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("form").submit(function(){
alert("Submitted");
});
});
</script>
</head>
<body>
<form action="">
First name: <input type="text" name="FirstName" value="Mickey"><br>
Last name: <input type="text" name="LastName" value="Mouse"><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
Also read this document DOCS
First of all make sure you are including/referencing JQuery Libray before you use JQuery. it should work.
Secondly you can use this
<body>
<form action="ServerSide" method="post" id="myform">
Enter list Size:<input type="text" name="listsize">
<input type="button" value="Submit" id="btn">
</form>
<script type="text/javascript">
$(document).ready(function(){
$("#btn").on('click',(function(){
alert("anything");
}));
});
</script>
</body>
I also notice that you had used input type submit it will submit form instead of calling click function. you should change type to button
if you want to do something on form submission you have to use onsubmit event
<body>
<form action="ServerSide" method="post" id="myform">
Enter list Size:<input type="text" name="listsize">
<input type="submit" value="Submit">
</form>
<script type="text/javascript">
$(document).ready(function(){
$("#myform").submit(function(){
alert("anything");
});
});
</script>
</body>
For this you don't need to add click listener on the submit button. once you submit form it will show you alert.

Stop Recaptcha from executing "action" in a form

I am trying to use jQuery to post and process a form.
<form action="/postcomment/" method="post" id="commentform">
<input type="text" name="author" id="author" />
<input type="text" name="email" id="email" />
<textarea name="comment" id="comment" ></textarea>
<input name="submit" type="submit" id="submit" value="Submit" />
</form>
and the jQuery code:
$("#submit").click(function() {
$.ajax({
dataType: 'json',
beforeSend: function() {
},
timeout: 60000,
error: function(request,error) {
},
success: function(data) {
var obj = jQuery.parseJSON(data);
//blah blah...
} // End success
}); // End ajax method
return false;
});
It works as expected. However, If I add the <script type="text/javascript" src="https://www.google.com/recaptcha/api/challenge?k=xxxx" > </script> into the form, it no longer works.
The browser will ask: There is a json file, do you want to open it?
Obviously the recaptcha script invoke the "post" action. How can I Stop Recaptcha from executing "action" in a form?
Related Question: Handling json Form with jQuery on Google App Engine
This is what I mean by changing the action, hopefully I am understanding your question:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script>
function changeAction() {
$("#myForm").attr("action", "anotherAction");
return false;
}
</script>
<title></title>
</head>
<body>
<form action="myFirstAction.html" id="myForm">
<input type="text" />
<button type="submit" onclick="return changeAction()">
</button>
</form>
</body>
</html>
After clicking the button the form's action is "anotherAction".

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