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Comments on How to submit form data with Ajax?

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How to submit form data with Ajax?

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I need to apply backend behavior (PHP directives in my case) to an HTML <form>.

The backend behavior I wish to apply to the form is in this pattern (behavior.php):

<?php
	$name = $_POST['name'];   # Required;
	$email = $_POST['email']; # Required;
	$to = 'example@example.com';
	$subject = 'A new message from: ' . $name;
	$headers[] = 'MIME-Version: 1.0';
	$headers[] = 'Content-type: text/html; charset=utf-8';
	mail($to, $subject, $message, implode("\r\n", $headers));
?>

The way I know to do this is with this HTML pattern:

<form action="/behavior.php" method="POST">

Now I have a form that the default behavior of which is prevented with preventDefault() so clicking the submit button will not cause form submission.
Therefore the HTML action and method became ineffective and I need to send the form's data with Ajax but according to the backend behavior (under behavior.php) where the relevant email address is stored.

In MDN "Using Fetch" I didn't find any code example with such a file reference.

javascript contact-form

posted almost 3 years ago

CC BY-SA 4.0

3y ago

deleted user

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3 comment threads

Not sure if that's what you need, but if I understood correctly, it'd be something like this: ```j... (10 comments)

Why do you have prevented the "default behavior" of the form? (3 comments)

Of course there is no "action" or "php" in the fetch() documentation... (7 comments)

hkotsubo‭ wrote almost 3 years ago

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Not sure if that's what you need, but if I understood correctly, it'd be something like this:

let form = // get the form somehow (for example, with querySelector)
form.addEventListener('submit', function(e) {
  e.preventDefault(); // don't submit the form
  fetch('backend.url')
   .then(function(response) {
      // do whatever you need with the response
   });
});

For the backend URL, you can also use form.getAttribute("action"), if you want to use the same URL that is in the action attribute.

deleted user wrote almost 3 years ago

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hkotsubo‭

I don't think that's what I want to do.

I want to send all form data to an email address according to the directives in a backend file ("behavior.php"), with:

<?php
	$topic = $_POST['topic']; # Required;
	$name = $_POST['name'];   # Required;
	$email = $_POST['email']; # Required;
	$url = $_POST['url']; 
	# Name attribute is "url" but input type is "text" because "url" obligates http:// or https:// which users normally don't input;
	$phone = $_POST['phone'];
	$notes = $_POST['notes']; # Normally turned off to prevent spam;

	$to = 'example@example.com';
	$subject = 'הודעה חדשה מאת: ' . $name;
	include 'message.php';
	$headers[] = 'MIME-Version: 1.0';
	$headers[] = 'Content-type: text/html; charset=utf-8';
	mail($to, $subject, $message, implode("\r\n", $headers));
?>

deleted user wrote almost 3 years ago

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"send data" means making a http request

I knew that.

using fetch with POST method (there's an example in the docs) And you can use FormData to send the form fields (if I understood correctly what you need)

But I want to keep the email address in a backend file (behavior.php) so it won't be detectable by the browser (as far as I know any JavaScript file affecting a webpage is available via the developer tools).

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Comments on How to submit form data with Ajax?

How to submit form data with Ajax?

3 comment threads