Capturing a form submit with jquery and .submit
JavascriptHtmlJqueryJavascript Problem Overview
I'm attempting to use jQuery to capture a submit event and then send the form elements formatted as JSON to a PHP page.
I'm having issues capturing the submit though, I started with a .click() event but moved to the .submit() one instead.
I now have the following trimmed down code.
HTML
<form method="POST" id="login_form">
<label>Username:</label>
<input type="text" name="username" id="username"/>
<label>Password:</label>
<input type="password" name="password" id="password"/>
<input type="submit" value="Submit" name="submit" class="submit" id="submit" />
</form>
Javascript
$('#login_form').submit(function() {
var data = $("#login_form :input").serializeArray();
alert('Handler for .submit() called.');
});
Javascript Solutions
Solution 1 - Javascript
Wrap the code in document ready and prevent the default submit action:
$(function() { //shorthand document.ready function
$('#login_form').on('submit', function(e) { //use on if jQuery 1.7+
e.preventDefault(); //prevent form from submitting
var data = $("#login_form :input").serializeArray();
console.log(data); //use the console for debugging, F12 in Chrome, not alerts
});
});
Solution 2 - Javascript
try this:
Use ´return false´ for to cut the flow of the event:
$('#login_form').submit(function() {
var data = $("#login_form :input").serializeArray();
alert('Handler for .submit() called.');
return false; // <- cancel event
});
Edit
corroborate if the form element with the 'length' of jQuery:
alert($('#login_form').length) // if is == 0, not found form
$('#login_form').submit(function() {
var data = $("#login_form :input").serializeArray();
alert('Handler for .submit() called.');
return false; // <- cancel event
});
OR:
it waits for the DOM is ready:
jQuery(function() {
alert($('#login_form').length) // if is == 0, not found form
$('#login_form').submit(function() {
var data = $("#login_form :input").serializeArray();
alert('Handler for .submit() called.');
return false; // <- cancel event
});
});
Do you put your code inside the event "ready" the document or after the DOM is ready?
Solution 3 - Javascript
Just replace the form.submit function with your own implementation:
var form = document.getElementById('form');
var formSubmit = form.submit; //save reference to original submit function
form.onsubmit = function(e)
{
formHandler();
return false;
};
var formHandler = form.submit = function()
{
alert('hi there');
formSubmit(); //optionally submit the form
};
Solution 4 - Javascript
Just a tip: Remember to put the code detection on document.ready, otherwise it might not work. That was my case.
Solution 5 - Javascript
$(document).ready(function () {
var form = $('#login_form')[0];
form.onsubmit = function(e){
var data = $("#login_form :input").serializeArray();
console.log(data);
$.ajax({
url: "the url to post",
data: data,
processData: false,
contentType: false,
type: 'POST',
success: function(data){
alert(data);
},
error: function(xhrRequest, status, error) {
alert(JSON.stringify(xhrRequest));
}
});
return false;
}
});
<!DOCTYPE html>
<html>
<head>
<title>Capturing sumit action</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<body>
<form method="POST" id="login_form">
<label>Username:</label>
<input type="text" name="username" id="username"/>
<label>Password:</label>
<input type="password" name="password" id="password"/>
<input type="submit" value="Submit" name="submit" class="submit" id="submit" />
</form>
</body>
</html>