first commit

media/plg_captcha_recaptcha/js/recaptcha.js

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+/**
+ * @package     Joomla.JavaScript
+ * @copyright   (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+((window, document) => {
+
+  window.JoomlainitReCaptcha2 = () => {
+    const elements = [].slice.call(document.getElementsByClassName('g-recaptcha'));
+    const optionKeys = ['sitekey', 'theme', 'size', 'tabindex', 'callback', 'expired-callback', 'error-callback'];
+    elements.forEach(element => {
+      let options = {};
+      if (element.dataset) {
+        options = element.dataset;
+      } else {
+        optionKeys.forEach(key => {
+          const optionKeyFq = `data-${key}`;
+          if (element.hasAttribute(optionKeyFq)) {
+            options[key] = element.getAttribute(optionKeyFq);
+          }
+        });
+      }
+
+      // Set the widget id of the recaptcha item
+      element.setAttribute('data-recaptcha-widget-id', window.grecaptcha.render(element, options));
+    });
+  };
+})(window, document);

media/plg_captcha_recaptcha/js/recaptcha.min.js

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+((t,a)=>{t.JoomlainitReCaptcha2=()=>{const e=[].slice.call(a.getElementsByClassName("g-recaptcha")),c=["sitekey","theme","size","tabindex","callback","expired-callback","error-callback"];e.forEach((a=>{let e={};a.dataset?e=a.dataset:c.forEach((t=>{const c=`data-${t}`;a.hasAttribute(c)&&(e[t]=a.getAttribute(c))})),a.setAttribute("data-recaptcha-widget-id",t.grecaptcha.render(a,e))}))}})(window,document);