From e133487d4a9165c412090816e823c737c370ffd1 Mon Sep 17 00:00:00 2001
From: Kamil Trzcinski <ayufan@ayufan.eu>
Date: Tue, 18 Aug 2020 14:27:19 +0200
Subject: [PATCH] Propagate reset to defaults to other forms

---
 js/persist.js | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/js/persist.js b/js/persist.js
index 46f9d80..548d312 100644
--- a/js/persist.js
+++ b/js/persist.js
@@ -39,7 +39,7 @@ function resetFormToDefaults(form) {
 
     setPersistedValue(element, null);
     if (element.defaultValue) {
-      setFormItemValue(element, element.defaultValue);
+      setFormItemValue(element, element.defaultValue, true);
     }
   }
 }
@@ -72,7 +72,7 @@ function getFormItemValue(element) {
   }
 }
 
-function setFormItemValue(element, value) {
+function setFormItemValue(element, value, forcePropagate = false) {
   if (element.type == "radio") {
     var realValue = (value == element.value);
 
@@ -97,11 +97,18 @@ function setFormItemValue(element, value) {
     element.value = value;
   }
 
-  element.dispatchEvent(persistChangeEvent);
+  // This will trigger `persistFormValue`
+  // that will propagate change into other forms
+  // but still execute `onchange=` assigned to elements
+  if (forcePropagate)
+    element.dispatchEvent(new Event('change'));
+  else
+    element.dispatchEvent(persistChangeEvent);
 }
 
 function persistFormValue(event) {
-  // ignore cascade updates
+  // ignore cascade updates generated by `setFormItemValue`
+  // unless `forcePropagate=true`
   if (persistChangeEvent == event) {
     return;
   }