From c9398e27f2bcaa80ece91403e86c16583f0dbd65 Mon Sep 17 00:00:00 2001
From: Philipp Memmel <philipp.memmel@gmail.com>
Date: Mon, 28 Aug 2023 11:42:28 +0200
Subject: [PATCH] MDL-78795 core_form: Fix repeated elements JS problem

Co-authored-by: Stefan Hanauska <stefan.hanauska@csg-in.de>
---
 lib/form/classes/external/dynamic_form.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/form/classes/external/dynamic_form.php b/lib/form/classes/external/dynamic_form.php
index f430d2fe622..8957a017414 100644
--- a/lib/form/classes/external/dynamic_form.php
+++ b/lib/form/classes/external/dynamic_form.php
@@ -77,6 +77,13 @@ class dynamic_form extends external_api {
 
         // Render actual form.
 
+        if ($form->no_submit_button_pressed()) {
+            // If form has not been submitted, we have to recreate the form for being able to properly handle non-submit action
+            // like "repeat elements" to include additional JS.
+            /** @var \core_form\dynamic_form $form */
+            $form = new $formclass(null, null, 'post', '', [], true, $formdata, true);
+            $form->set_data_for_dynamic_submission();
+        }
         // Hack alert: Forcing bootstrap_renderer to initiate moodle page.
         $OUTPUT->header();