De-flake preview iframe error msg removal (#69)

src/components/preview_panel/PreviewIframe.tsx

@@ -414,6 +414,9 @@ export const PreviewIframe = ({ loading }: { loading: boolean }) => {
           </div>
         ) : (
           <iframe
+            onLoad={() => {
+              setErrorMessage(undefined);
+            }}
             ref={iframeRef}
             key={reloadKey}
             title={`Preview for App ${selectedAppId}`}

src/hooks/useRunApp.ts

@@ -82,8 +82,7 @@ export function useRunApp() {
 
   const onHotModuleReload = useCallback(() => {
     setPreviewPanelKey((prevKey) => prevKey + 1);
-    setPreviewErrorMessage(undefined);
-  }, [setPreviewPanelKey, setPreviewErrorMessage]);
+  }, [setPreviewPanelKey]);
 
   const restartApp = useCallback(
     async ({
@@ -151,8 +150,7 @@ export function useRunApp() {
 
   const refreshAppIframe = useCallback(async () => {
     setPreviewPanelKey((prevKey) => prevKey + 1);
-    setPreviewErrorMessage(undefined);
-  }, [setPreviewPanelKey, setPreviewErrorMessage]);
+  }, [setPreviewPanelKey]);
 
   return {
     loading,