Mulitple Google Captchas

html-document.html

<!--Remote Google Script-->
<script src="https://www.google.com/recaptcha/api.js?onload=onCaptchaLoad&render=explicit" async defer></script>
<!--Local site script-->
<script>
var onCaptchaLoad = function() {
    var captchaElements = document.querySelectorAll('div[data-captcha="true"]');
    for (var i = captchaElements.length - 1; i >= 0; i--) {
        grecaptcha.render(captchaElements[i], {
            'sitekey': 'SITE_KEY',
            'theme': 'light'
        });
    }
};
</script>

<!--Inserting a captcha-->
<div data-captcha="true"></div>