Initial commit

src/PowderCoating.Web/wwwroot/js/catalog.js

@@ -0,0 +1,21 @@
+/**
+ * Saves accordion open/closed state on toggle. The initial state restoration is
+ * handled by an inline script in the view that runs synchronously before Bootstrap
+ * initializes, preventing any visible flash.
+ *
+ * Key format: pcl_catalog_acc_{collapseId}  →  "1" (open) or "0" (closed)
+ */
+(function () {
+    const PREFIX = 'pcl_catalog_acc_';
+
+    document.addEventListener('DOMContentLoaded', function () {
+        document.querySelectorAll('.catalog-tree .collapse').forEach(function (el) {
+            el.addEventListener('show.bs.collapse', function () {
+                localStorage.setItem(PREFIX + el.id, '1');
+            });
+            el.addEventListener('hide.bs.collapse', function () {
+                localStorage.setItem(PREFIX + el.id, '0');
+            });
+        });
+    });
+}());