From de40ace56fee723d12d4eb50f71832e0cbb73984 Mon Sep 17 00:00:00 2001
From: Istvan Novak <dotneteer@hotmail.com>
Date: Mon, 20 Oct 2025 08:03:12 +0200
Subject: [PATCH] Fix loading code-behind files in standalone mode

---
 .changeset/twelve-guests-care.md            |  5 ++
 xmlui/src/components-core/StandaloneApp.tsx | 90 +++++++++------------
 2 files changed, 41 insertions(+), 54 deletions(-)
 create mode 100644 .changeset/twelve-guests-care.md

diff --git a/.changeset/twelve-guests-care.md b/.changeset/twelve-guests-care.md
new file mode 100644
index 000000000..906360967
--- /dev/null
+++ b/.changeset/twelve-guests-care.md
@@ -0,0 +1,5 @@
+---
+"xmlui": patch
+---
+
+Fix loading code-behind files in standalone mode
diff --git a/xmlui/src/components-core/StandaloneApp.tsx b/xmlui/src/components-core/StandaloneApp.tsx
index bc0f47067..8ca79c13d 100644
--- a/xmlui/src/components-core/StandaloneApp.tsx
+++ b/xmlui/src/components-core/StandaloneApp.tsx
@@ -65,7 +65,7 @@ type RuntimeProps = {
   component?: ComponentDef | CompoundComponentDef;
   file?: string;
   src?: string;
-}
+};
 
 // --- The properties of the standalone app
 type StandaloneAppProps = {
@@ -743,26 +743,19 @@ function useStandalone(
         errorComponents.push(loadedEntryPoint!.component as ComponentDef);
       }
 
-      let loadedEntryPointCodeBehind = null;
-      if (loadedEntryPoint.component.props?.codeBehind !== undefined) {
-        // --- We have a code-behind file for the main component
-        loadedEntryPointCodeBehind = (await new Promise(async (resolve) => {
-          try {
-            const resp = await fetchWithoutCache(
-              resolvePath(
-                MAIN_FILE,
-                loadedEntryPoint.component.props?.codeBehind || MAIN_CODE_BEHIND_FILE,
-              ),
-            );
-            const codeBehind = await parseCodeBehindResponse(resp);
-            resolve(codeBehind.hasError ? codeBehind : codeBehind.codeBehind);
-          } catch (e) {
-            resolve(null);
-          }
-        })) as any;
-        if (loadedEntryPointCodeBehind.hasError) {
-          errorComponents.push(loadedEntryPointCodeBehind.component as ComponentDef);
+      // -- Load the main component's code-behind file if any
+      const mainCodeBehind = loadedEntryPoint.component.props?.codeBehind || MAIN_CODE_BEHIND_FILE;
+      let loadedEntryPointCodeBehind = (await new Promise(async (resolve) => {
+        try {
+          const resp = await fetchWithoutCache(resolvePath(MAIN_FILE, mainCodeBehind));
+          const codeBehind = await parseCodeBehindResponse(resp);
+          resolve(codeBehind?.hasError ? codeBehind : codeBehind.codeBehind);
+        } catch (e) {
+          resolve(null);
         }
+      })) as any;
+      if (loadedEntryPointCodeBehind?.hasError) {
+        errorComponents.push(loadedEntryPointCodeBehind.component as ComponentDef);
       }
 
       // --- Check if any of the components have markup errors
@@ -797,9 +790,6 @@ function useStandalone(
         } else {
           if (compWrapper.file) {
             sources[compWrapper.file] = compWrapper.src;
-            // resolvedRuntime.projectCompilation.entrypoint.filename = MAIN_FILE;
-            // resolvedRuntime.projectCompilation.entrypoint.definition = loadedEntryPoint.component;
-            // resolvedRuntime.projectCompilation.entrypoint.markupSource = loadedEntryPoint.src;
           }
         }
       });
@@ -885,38 +875,30 @@ function useStandalone(
               definition: compWrapper.component as CompoundComponentDef,
             };
 
-            let componentCodeBehind = null;
-            if (
-              "codeBehind" in compWrapper.component &&
-              compWrapper.component?.codeBehind !== undefined
-            ) {
-              // --- Promises for the component code-behind files
-              componentCodeBehind = (await new Promise(async (resolve) => {
-                try {
-                  const codeBehind = await fetchWithoutCache(
-                    resolvePath(
-                      `components/${componentPath}`,
-                      (compWrapper.component as CompoundComponentDef)?.codeBehind ||
-                        `${componentPath}.${codeBehindFileExtension}`,
-                    ),
-                  );
-                  const codeBehindWrapper = await parseCodeBehindResponse(codeBehind);
-                  if (codeBehindWrapper.hasError) {
-                    errorComponents.push(codeBehindWrapper.component as ComponentDef);
-                  }
-                  resolve(
-                    codeBehindWrapper.hasError
-                      ? (codeBehindWrapper.component as CompoundComponentDef)
-                      : codeBehindWrapper,
-                  );
-                } catch {
-                  resolve(null);
+            const componentCodeBehindFile =
+              (compWrapper.component as CompoundComponentDef)?.codeBehind ||
+              `${componentPath}.${codeBehindFileExtension}`;
+            let componentCodeBehind = (await new Promise(async (resolve) => {
+              try {
+                const codeBehind = await fetchWithoutCache(
+                  resolvePath(`components/${componentPath}`, componentCodeBehindFile),
+                );
+                const codeBehindWrapper = await parseCodeBehindResponse(codeBehind);
+                if (codeBehindWrapper.hasError) {
+                  errorComponents.push(codeBehindWrapper.component as ComponentDef);
                 }
-              })) as Promise<CompoundComponentDef | ParsedResponse>;
-
-              if (componentCodeBehind && "src" in componentCodeBehind) {
-                compCompilation.codeBehindSource = componentCodeBehind.src;
+                resolve(
+                  codeBehindWrapper.hasError
+                    ? (codeBehindWrapper.component as CompoundComponentDef)
+                    : codeBehindWrapper,
+                );
+              } catch {
+                resolve(null);
               }
+            })) as any;
+
+            if (componentCodeBehind && "src" in componentCodeBehind) {
+              compCompilation.codeBehindSource = (componentCodeBehind as any).src;
             }
 
             resolvedRuntime.projectCompilation.components.push(compCompilation);
@@ -927,7 +909,7 @@ function useStandalone(
                 ...(compWrapper.component as any).component,
                 vars: {
                   ...(compWrapper.component as any).component.vars,
-                  ...componentCodeBehind?.component?.vars,
+                  ...componentCodeBehind?.codeBehind?.vars,
                 },
               },
             };