function showInput()
    {
        $config = Package::getByHandle('ec_recaptcha')->getConfig();
        $rag = ResponseAssetGroup::get();
         //use Google reCaptcha's explicit rendering for multiple widgets
        $lang = $config->get('captcha.language');
        if ($lang !== 'auto') {
            $rag->addFooterAsset('<script src="https://www.google.com/recaptcha/api.js?hl=' . $lang . '&onload=onloadCallback&render=explicit"
        async defer></script>');
        } else {
            $rag->addFooterAsset('<script src="https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit"
        async defer></script>');
        }
       //create unique recaptcha blocks
        $randomNumber = mt_rand(10000000, 99999999);

<script>
        var captcha;
        var onloadCallback = function() {
        var recaptchas = document.querySelectorAll('div[id^=recaptcha-block-]');
        for (i = 0; i < recaptchas.length; i++) {
            captcha = grecaptcha.render(recaptchas[i].id, {
              'sitekey' : recaptchas[i].dataset.sitekey,
              'theme'   : recaptchas[i].dataset.theme
            });
        }
      };
    </script>