Submitting form doesn't work after using Recaptcha v3 - laravel

Question

I'm trying to use Recaptcha v3 on my form but submitting the form only works when Recaptcha is removed.
When Recaptcha is enabled, I can click on the submit button but nothing happens. I don't even get an error message in the console even though I can see the protected by reCAPTCHA logo in the frontend on the bottom right.
I'm using Laravel 6.
My form template looks like this:
<div class="row mt-150">
<div class="col-12 text-center text-white">
<h1>Contact</h1>
</div>
</div>
<div class="row justify-content-center">
<div class="col-md-4 col-sm-12">
<form action="{{route('contact_form')}}" method="POST">
#csrf
<div class="form-group">
<label for="email" class="text-white">Email address</label>
<input type="email" class="form-control" id="email" name="email" required>
</div>
<div class="form-group">
<label for="textarea" class="text-white">Message</label>
<textarea class="form-control" id="textarea" rows="3" name="message" required></textarea>
</div>
<input type="submit"
id="submitButton"
class="g-recaptcha btn btn-primary"
data-sitekey="MY-PUBLIC-KEY"
data-callback='onSubmit'
data-action='submit'
name="submit">
</form>
</div>
</div>
<script src="https://www.google.com/recaptcha/api.js"></script>
There is also an app.js included which contains the captcha callback function:
function onSubmit(token) {
document.getElementById("submitButton").submit();
}
window.onSubmit = onSubmit;
Can someone give me a hint what I'm doing wrong implementing recaptcha?
I tried to do it just like this:
Google reCaptcha v3

Answer 1

This will not work because you are trying to trigger submit() on a button. Give the form an id and then trigger submit() on the form
<form action="{{route('contact_form')}}" method="POST" id="contactForm">
#csrf
<div class="form-group">
<label for="email" class="text-white">Email address</label>
<input type="email" class="form-control" id="email" name="email" required>
</div>
<div class="form-group">
<label for="textarea" class="text-white">Message</label>
<textarea class="form-control" id="textarea" rows="3" name="message" required></textarea>
</div>
<input type="submit"
id="submitButton"
class="g-recaptcha btn btn-primary"
data-sitekey="MY-PUBLIC-KEY"
data-callback='onSubmit'
data-action='submit'
name="submit">
</form>
Then in javascript get the form and trigger submit on it
function onSubmit(token) {
document.getElementById("contactForm").submit();
}
window.onSubmit = onSubmit;