obs studio use script
<!-- index.ejs -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Node js Google v3 Recaptcha Example Tutorial</title>
<link rel="stylesheet" href="bootstrap.min.css">
</head>
<body>
<div class="container"><br />
<h1>Google Recaptcha Tutorial</h1><br />
<form method="post" action="/captcha">
<input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response">
<input type="hidden" name="action" value="validate_captcha">
<div class="row">
<div class="col-md-4"></div>
<div class="form-group col-md-4">
<label for="name">Name:</label>
<input type="text" class="form-control" name="name">
</div>
</div>
<div class="row">
<div class="col-md-4"></div>
<div class="form-group col-md-4">
<button type="submit" class="btn btn-success" style="margin-left:38px">Send</button>
</div>
</div>
</form>
</div>
<script src="https://www.google.com/recaptcha/api.js?render=your reCAPTCHA site key here"></script>
<script>
grecaptcha.ready(function() {
// do request for recaptcha token
// response is promise with passed token
grecaptcha.execute('your reCAPTCHA site key here', {action:'validate_captcha'})
.then(function(token) {
// add token value to form
document.getElementById('g-recaptcha-response').value = token;
});
});
</script>
</body>
</html>