example code of a website with google recaptcha
<html>
<head>
<title>Subscribe to Newsletter</title>
<script
src="https://code.jquery.com/jquery-3.4.1.min.js"
integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
crossorigin="anonymous"></script>
<script src="https://www.google.com/recaptcha/api.js?render=6LdLk7EUAAAAAEWHuB2tabMmlxQ2-RRTLPHEGe9Y"></script>
</head>
<body>
<div>
<b>Subscribe Newsletter</b>
</div>
<form id="newsletterForm" action="subscribe_newsletter_submit.php" method="post">
<div>
<div>
<input type="email" id="email" name="email">
</div>
<div>
<input type="submit" value="submit">
</div>
</div>
</form>
<script>
$('#newsletterForm').submit(function(event) {
event.preventDefault();
var email = $('#email').val();
grecaptcha.ready(function() {
grecaptcha.execute('6LdLk7EUAAAAAEWHuB2tabMmlxQ2-RRTLPHEGe9Y', {action: 'subscribe_newsletter'}).then(function(token) {
$('#newsletterForm').prepend('<input type="hidden" name="token" value="' + token + '">');
$('#newsletterForm').prepend('<input type="hidden" name="action" value="subscribe_newsletter">');
$('#newsletterForm').unbind('submit').submit();
});;
});
});
</script>
</body>
</html><div class="open_grepper_editor" title="Edit & Save To Grepper"></div>