first commit

media/plg_installer_urlinstaller/js/urlinstaller.js

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+/**
+ * @copyright   (C) 2020 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+Joomla = window.Joomla || {};
+(Joomla => {
+
+  document.addEventListener('DOMContentLoaded', () => {
+    Joomla.submitbuttonurl = () => {
+      const form = document.getElementById('adminForm');
+      const loading = document.getElementById('loading');
+      if (loading) {
+        loading.classList.remove('hidden');
+      }
+      form.installtype.value = 'url';
+      form.submit();
+    };
+  });
+})(Joomla);

media/plg_installer_urlinstaller/js/urlinstaller.min.js

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+Joomla=window.Joomla||{},(e=>{document.addEventListener("DOMContentLoaded",(()=>{e.submitbuttonurl=()=>{const e=document.getElementById("adminForm"),t=document.getElementById("loading");t&&t.classList.remove("hidden"),e.installtype.value="url",e.submit()}}))})(Joomla);