add name and message to frontendend exception handler (#5585)

adhami3310 · web-flow · commit 9268189eaf0c · 2025-07-17T13:18:39.000-07:00
* add name and message to frontendend exception handler

* missed one in state.js

* on error
diff --git a/reflex/.templates/web/utils/state.js b/reflex/.templates/web/utils/state.js
@@ -993,7 +993,7 @@ export const useEventLoop = (
     window.onerror = function (msg, url, lineNo, columnNo, error) {
       addEvents([
         Event(`${exception_state_name}.handle_frontend_exception`, {
-          stack: error.stack,
+          info: error.name + ": " + error.message + "\n" + error.stack,
           component_stack: "",
         }),
       ]);
@@ -1005,7 +1005,12 @@ export const useEventLoop = (
     window.onunhandledrejection = function (event) {
       addEvents([
         Event(`${exception_state_name}.handle_frontend_exception`, {
-          stack: event.reason?.stack,
+          info:
+            event.reason?.name +
+            ": " +
+            event.reason?.message +
+            "\n" +
+            event.reason?.stack,
           component_stack: "",
         }),
       ]);
diff --git a/reflex/components/base/error_boundary.py b/reflex/components/base/error_boundary.py
@@ -25,11 +25,14 @@ def on_error_spec(
         The arguments for the event handler.
     """
     return (
-        error.stack,
+        error.name.to(str) + ": " + error.message.to(str) + "\n" + error.stack.to(str),
         info.componentStack,
     )
 
 
+_ERROR_DISPLAY: str = r"""event_args.error.name + ': ' + event_args.error.message + '\n' + event_args.error.stack"""
+
+
 class ErrorBoundary(Component):
     """A React Error Boundary component that catches unhandled frontend exceptions."""
 
@@ -76,9 +79,7 @@ def create(cls, *children, **props):
                                     div(
                                         div(
                                             pre(
-                                                Var(
-                                                    _js_expr="event_args.error.stack",
-                                                ),
+                                                Var(_js_expr=_ERROR_DISPLAY),
                                             ),
                                             padding="0.5rem",
                                             width="fit-content",
@@ -93,7 +94,7 @@ def create(cls, *children, **props):
                                     button(
                                         "Copy",
                                         on_click=set_clipboard(
-                                            Var(_js_expr="event_args.error.stack"),
+                                            Var(_js_expr=_ERROR_DISPLAY)
                                         ),
                                         padding="0.35rem 0.75rem",
                                         margin="0.5rem",
diff --git a/reflex/state.py b/reflex/state.py
@@ -2417,19 +2417,19 @@ class FrontendEventExceptionState(State):
     """Substate for handling frontend exceptions."""
 
     @event
-    def handle_frontend_exception(self, stack: str, component_stack: str) -> None:
+    def handle_frontend_exception(self, info: str, component_stack: str) -> None:
         """Handle frontend exceptions.
 
         If a frontend exception handler is provided, it will be called.
         Otherwise, the default frontend exception handler will be called.
 
         Args:
-            stack: The stack trace of the exception.
+            info: The exception information.
             component_stack: The stack trace of the component where the exception occurred.
 
         """
         prerequisites.get_and_validate_app().app.frontend_exception_handler(
-            Exception(stack)
+            Exception(info)
         )
 
 
diff --git a/tests/units/test_app.py b/tests/units/test_app.py
@@ -1363,8 +1363,8 @@ def test_app_wrap_compile_theme(
         "return ("
         + ("jsx(StrictMode,{}," if react_strict_mode else "")
         + "jsx(ErrorBoundary,{"
-        """fallbackRender:((event_args) => (jsx("div", ({css:({ ["height"] : "100%", ["width"] : "100%", ["position"] : "absolute", ["display"] : "flex", ["alignItems"] : "center", ["justifyContent"] : "center" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem", ["maxWidth"] : "50ch", ["border"] : "1px solid #888888", ["borderRadius"] : "0.25rem", ["padding"] : "1rem" })}), (jsx("h2", ({css:({ ["fontSize"] : "1.25rem", ["fontWeight"] : "bold" })}), (jsx(Fragment, ({}), "An error occurred while rendering this page.")))), (jsx("p", ({css:({ ["opacity"] : "0.75" })}), (jsx(Fragment, ({}), "This is an error with the application itself.")))), (jsx("details", ({}), (jsx("summary", ({css:({ ["padding"] : "0.5rem" })}), (jsx(Fragment, ({}), "Error message")))), (jsx("div", ({css:({ ["width"] : "100%", ["maxHeight"] : "50vh", ["overflow"] : "auto", ["background"] : "#000", ["color"] : "#fff", ["borderRadius"] : "0.25rem" })}), (jsx("div", ({css:({ ["padding"] : "0.5rem", ["width"] : "fit-content" })}), (jsx("pre", ({}), (jsx(Fragment, ({}), event_args.error.stack)))))))), (jsx("button", ({css:({ ["padding"] : "0.35rem 0.75rem", ["margin"] : "0.5rem", ["background"] : "#fff", ["color"] : "#000", ["border"] : "1px solid #000", ["borderRadius"] : "0.25rem", ["fontWeight"] : "bold" }),onClick:((_e) => (addEvents([(Event("_call_function", ({ ["function"] : (() => (navigator["clipboard"]["writeText"](event_args.error.stack))), ["callback"] : null }), ({  })))], [_e], ({  }))))}), (jsx(Fragment, ({}), "Copy")))))))), (jsx("hr", ({css:({ ["borderColor"] : "currentColor", ["opacity"] : "0.25" })}))), (jsx(ReactRouterLink, ({to:"https://reflex.dev"}), (jsx("div", ({css:({ ["display"] : "flex", ["alignItems"] : "baseline", ["justifyContent"] : "center", ["fontFamily"] : "monospace", ["--default-font-family"] : "monospace", ["gap"] : "0.5rem" })}), (jsx(Fragment, ({}), "Built with ")), (jsx("svg", ({"aria-label":"Reflex",css:({ ["fill"] : "currentColor" }),height:"12",role:"img",width:"56",xmlns:"http://www.w3.org/2000/svg"}), (jsx("path", ({d:"M0 11.5999V0.399902H8.96V4.8799H6.72V2.6399H2.24V4.8799H6.72V7.1199H2.24V11.5999H0ZM6.72 11.5999V7.1199H8.96V11.5999H6.72Z"}))), (jsx("path", ({d:"M11.2 11.5999V0.399902H17.92V2.6399H13.44V4.8799H17.92V7.1199H13.44V9.3599H17.92V11.5999H11.2Z"}))), (jsx("path", ({d:"M20.16 11.5999V0.399902H26.88V2.6399H22.4V4.8799H26.88V7.1199H22.4V11.5999H20.16Z"}))), (jsx("path", ({d:"M29.12 11.5999V0.399902H31.36V9.3599H35.84V11.5999H29.12Z"}))), (jsx("path", ({d:"M38.08 11.5999V0.399902H44.8V2.6399H40.32V4.8799H44.8V7.1199H40.32V9.3599H44.8V11.5999H38.08Z"}))), (jsx("path", ({d:"M47.04 4.8799V0.399902H49.28V4.8799H47.04ZM53.76 4.8799V0.399902H56V4.8799H53.76ZM49.28 7.1199V4.8799H53.76V7.1199H49.28ZM47.04 11.5999V7.1199H49.28V11.5999H47.04ZM53.76 11.5999V7.1199H56V11.5999H53.76Z"}))), (jsx("title", ({}), (jsx(Fragment, ({}), "Reflex"))))))))))))))),"""
-        """onError:((_error, _info) => (addEvents([(Event("reflex___state____state.reflex___state____frontend_event_exception_state.handle_frontend_exception", ({ ["stack"] : _error["stack"], ["component_stack"] : _info["componentStack"] }), ({  })))], [_error, _info], ({  }))))"""
+        """fallbackRender:((event_args) => (jsx("div", ({css:({ ["height"] : "100%", ["width"] : "100%", ["position"] : "absolute", ["display"] : "flex", ["alignItems"] : "center", ["justifyContent"] : "center" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem", ["maxWidth"] : "50ch", ["border"] : "1px solid #888888", ["borderRadius"] : "0.25rem", ["padding"] : "1rem" })}), (jsx("h2", ({css:({ ["fontSize"] : "1.25rem", ["fontWeight"] : "bold" })}), (jsx(Fragment, ({}), "An error occurred while rendering this page.")))), (jsx("p", ({css:({ ["opacity"] : "0.75" })}), (jsx(Fragment, ({}), "This is an error with the application itself.")))), (jsx("details", ({}), (jsx("summary", ({css:({ ["padding"] : "0.5rem" })}), (jsx(Fragment, ({}), "Error message")))), (jsx("div", ({css:({ ["width"] : "100%", ["maxHeight"] : "50vh", ["overflow"] : "auto", ["background"] : "#000", ["color"] : "#fff", ["borderRadius"] : "0.25rem" })}), (jsx("div", ({css:({ ["padding"] : "0.5rem", ["width"] : "fit-content" })}), (jsx("pre", ({}), (jsx(Fragment, ({}), event_args.error.name + \': \' + event_args.error.message + \'\\n\' + event_args.error.stack)))))))), (jsx("button", ({css:({ ["padding"] : "0.35rem 0.75rem", ["margin"] : "0.5rem", ["background"] : "#fff", ["color"] : "#000", ["border"] : "1px solid #000", ["borderRadius"] : "0.25rem", ["fontWeight"] : "bold" }),onClick:((_e) => (addEvents([(Event("_call_function", ({ ["function"] : (() => (navigator["clipboard"]["writeText"](event_args.error.name + \': \' + event_args.error.message + \'\\n\' + event_args.error.stack))), ["callback"] : null }), ({  })))], [_e], ({  }))))}), (jsx(Fragment, ({}), "Copy")))))))), (jsx("hr", ({css:({ ["borderColor"] : "currentColor", ["opacity"] : "0.25" })}))), (jsx(ReactRouterLink, ({to:"https://reflex.dev"}), (jsx("div", ({css:({ ["display"] : "flex", ["alignItems"] : "baseline", ["justifyContent"] : "center", ["fontFamily"] : "monospace", ["--default-font-family"] : "monospace", ["gap"] : "0.5rem" })}), (jsx(Fragment, ({}), "Built with ")), (jsx("svg", ({"aria-label":"Reflex",css:({ ["fill"] : "currentColor" }),height:"12",role:"img",width:"56",xmlns:"http://www.w3.org/2000/svg"}), (jsx("path", ({d:"M0 11.5999V0.399902H8.96V4.8799H6.72V2.6399H2.24V4.8799H6.72V7.1199H2.24V11.5999H0ZM6.72 11.5999V7.1199H8.96V11.5999H6.72Z"}))), (jsx("path", ({d:"M11.2 11.5999V0.399902H17.92V2.6399H13.44V4.8799H17.92V7.1199H13.44V9.3599H17.92V11.5999H11.2Z"}))), (jsx("path", ({d:"M20.16 11.5999V0.399902H26.88V2.6399H22.4V4.8799H26.88V7.1199H22.4V11.5999H20.16Z"}))), (jsx("path", ({d:"M29.12 11.5999V0.399902H31.36V9.3599H35.84V11.5999H29.12Z"}))), (jsx("path", ({d:"M38.08 11.5999V0.399902H44.8V2.6399H40.32V4.8799H44.8V7.1199H40.32V9.3599H44.8V11.5999H38.08Z"}))), (jsx("path", ({d:"M47.04 4.8799V0.399902H49.28V4.8799H47.04ZM53.76 4.8799V0.399902H56V4.8799H53.76ZM49.28 7.1199V4.8799H53.76V7.1199H49.28ZM47.04 11.5999V7.1199H49.28V11.5999H47.04ZM53.76 11.5999V7.1199H56V11.5999H53.76Z"}))), (jsx("title", ({}), (jsx(Fragment, ({}), "Reflex"))))))))))))))),"""
+        """onError:((_error, _info) => (addEvents([(Event("reflex___state____state.reflex___state____frontend_event_exception_state.handle_frontend_exception", ({ ["info"] : ((((_error["name"]+": ")+_error["message"])+"\\n")+_error["stack"]), ["component_stack"] : _info["componentStack"] }), ({  })))], [_error, _info], ({  }))))"""
         "},"
         "jsx(RadixThemesColorModeProvider,{},"
         "jsx(RadixThemesTheme,{accentColor:\"plum\",css:{...theme.styles.global[':root'], ...theme.styles.global.body}},"
@@ -1441,8 +1441,8 @@ def page():
         + ("jsx(StrictMode,{}," if react_strict_mode else "")
         + "jsx(RadixThemesBox,{},"
         "jsx(ErrorBoundary,{"
-        """fallbackRender:((event_args) => (jsx("div", ({css:({ ["height"] : "100%", ["width"] : "100%", ["position"] : "absolute", ["display"] : "flex", ["alignItems"] : "center", ["justifyContent"] : "center" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem", ["maxWidth"] : "50ch", ["border"] : "1px solid #888888", ["borderRadius"] : "0.25rem", ["padding"] : "1rem" })}), (jsx("h2", ({css:({ ["fontSize"] : "1.25rem", ["fontWeight"] : "bold" })}), (jsx(Fragment, ({}), "An error occurred while rendering this page.")))), (jsx("p", ({css:({ ["opacity"] : "0.75" })}), (jsx(Fragment, ({}), "This is an error with the application itself.")))), (jsx("details", ({}), (jsx("summary", ({css:({ ["padding"] : "0.5rem" })}), (jsx(Fragment, ({}), "Error message")))), (jsx("div", ({css:({ ["width"] : "100%", ["maxHeight"] : "50vh", ["overflow"] : "auto", ["background"] : "#000", ["color"] : "#fff", ["borderRadius"] : "0.25rem" })}), (jsx("div", ({css:({ ["padding"] : "0.5rem", ["width"] : "fit-content" })}), (jsx("pre", ({}), (jsx(Fragment, ({}), event_args.error.stack)))))))), (jsx("button", ({css:({ ["padding"] : "0.35rem 0.75rem", ["margin"] : "0.5rem", ["background"] : "#fff", ["color"] : "#000", ["border"] : "1px solid #000", ["borderRadius"] : "0.25rem", ["fontWeight"] : "bold" }),onClick:((_e) => (addEvents([(Event("_call_function", ({ ["function"] : (() => (navigator["clipboard"]["writeText"](event_args.error.stack))), ["callback"] : null }), ({  })))], [_e], ({  }))))}), (jsx(Fragment, ({}), "Copy")))))))), (jsx("hr", ({css:({ ["borderColor"] : "currentColor", ["opacity"] : "0.25" })}))), (jsx(ReactRouterLink, ({to:"https://reflex.dev"}), (jsx("div", ({css:({ ["display"] : "flex", ["alignItems"] : "baseline", ["justifyContent"] : "center", ["fontFamily"] : "monospace", ["--default-font-family"] : "monospace", ["gap"] : "0.5rem" })}), (jsx(Fragment, ({}), "Built with ")), (jsx("svg", ({"aria-label":"Reflex",css:({ ["fill"] : "currentColor" }),height:"12",role:"img",width:"56",xmlns:"http://www.w3.org/2000/svg"}), (jsx("path", ({d:"M0 11.5999V0.399902H8.96V4.8799H6.72V2.6399H2.24V4.8799H6.72V7.1199H2.24V11.5999H0ZM6.72 11.5999V7.1199H8.96V11.5999H6.72Z"}))), (jsx("path", ({d:"M11.2 11.5999V0.399902H17.92V2.6399H13.44V4.8799H17.92V7.1199H13.44V9.3599H17.92V11.5999H11.2Z"}))), (jsx("path", ({d:"M20.16 11.5999V0.399902H26.88V2.6399H22.4V4.8799H26.88V7.1199H22.4V11.5999H20.16Z"}))), (jsx("path", ({d:"M29.12 11.5999V0.399902H31.36V9.3599H35.84V11.5999H29.12Z"}))), (jsx("path", ({d:"M38.08 11.5999V0.399902H44.8V2.6399H40.32V4.8799H44.8V7.1199H40.32V9.3599H44.8V11.5999H38.08Z"}))), (jsx("path", ({d:"M47.04 4.8799V0.399902H49.28V4.8799H47.04ZM53.76 4.8799V0.399902H56V4.8799H53.76ZM49.28 7.1199V4.8799H53.76V7.1199H49.28ZM47.04 11.5999V7.1199H49.28V11.5999H47.04ZM53.76 11.5999V7.1199H56V11.5999H53.76Z"}))), (jsx("title", ({}), (jsx(Fragment, ({}), "Reflex"))))))))))))))),"""
-        """onError:((_error, _info) => (addEvents([(Event("reflex___state____state.reflex___state____frontend_event_exception_state.handle_frontend_exception", ({ ["stack"] : _error["stack"], ["component_stack"] : _info["componentStack"] }), ({  })))], [_error, _info], ({  }))))"""
+        """fallbackRender:((event_args) => (jsx("div", ({css:({ ["height"] : "100%", ["width"] : "100%", ["position"] : "absolute", ["display"] : "flex", ["alignItems"] : "center", ["justifyContent"] : "center" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem" })}), (jsx("div", ({css:({ ["display"] : "flex", ["flexDirection"] : "column", ["gap"] : "1rem", ["maxWidth"] : "50ch", ["border"] : "1px solid #888888", ["borderRadius"] : "0.25rem", ["padding"] : "1rem" })}), (jsx("h2", ({css:({ ["fontSize"] : "1.25rem", ["fontWeight"] : "bold" })}), (jsx(Fragment, ({}), "An error occurred while rendering this page.")))), (jsx("p", ({css:({ ["opacity"] : "0.75" })}), (jsx(Fragment, ({}), "This is an error with the application itself.")))), (jsx("details", ({}), (jsx("summary", ({css:({ ["padding"] : "0.5rem" })}), (jsx(Fragment, ({}), "Error message")))), (jsx("div", ({css:({ ["width"] : "100%", ["maxHeight"] : "50vh", ["overflow"] : "auto", ["background"] : "#000", ["color"] : "#fff", ["borderRadius"] : "0.25rem" })}), (jsx("div", ({css:({ ["padding"] : "0.5rem", ["width"] : "fit-content" })}), (jsx("pre", ({}), (jsx(Fragment, ({}), event_args.error.name + \': \' + event_args.error.message + \'\\n\' + event_args.error.stack)))))))), (jsx("button", ({css:({ ["padding"] : "0.35rem 0.75rem", ["margin"] : "0.5rem", ["background"] : "#fff", ["color"] : "#000", ["border"] : "1px solid #000", ["borderRadius"] : "0.25rem", ["fontWeight"] : "bold" }),onClick:((_e) => (addEvents([(Event("_call_function", ({ ["function"] : (() => (navigator["clipboard"]["writeText"](event_args.error.name + \': \' + event_args.error.message + \'\\n\' + event_args.error.stack))), ["callback"] : null }), ({  })))], [_e], ({  }))))}), (jsx(Fragment, ({}), "Copy")))))))), (jsx("hr", ({css:({ ["borderColor"] : "currentColor", ["opacity"] : "0.25" })}))), (jsx(ReactRouterLink, ({to:"https://reflex.dev"}), (jsx("div", ({css:({ ["display"] : "flex", ["alignItems"] : "baseline", ["justifyContent"] : "center", ["fontFamily"] : "monospace", ["--default-font-family"] : "monospace", ["gap"] : "0.5rem" })}), (jsx(Fragment, ({}), "Built with ")), (jsx("svg", ({"aria-label":"Reflex",css:({ ["fill"] : "currentColor" }),height:"12",role:"img",width:"56",xmlns:"http://www.w3.org/2000/svg"}), (jsx("path", ({d:"M0 11.5999V0.399902H8.96V4.8799H6.72V2.6399H2.24V4.8799H6.72V7.1199H2.24V11.5999H0ZM6.72 11.5999V7.1199H8.96V11.5999H6.72Z"}))), (jsx("path", ({d:"M11.2 11.5999V0.399902H17.92V2.6399H13.44V4.8799H17.92V7.1199H13.44V9.3599H17.92V11.5999H11.2Z"}))), (jsx("path", ({d:"M20.16 11.5999V0.399902H26.88V2.6399H22.4V4.8799H26.88V7.1199H22.4V11.5999H20.16Z"}))), (jsx("path", ({d:"M29.12 11.5999V0.399902H31.36V9.3599H35.84V11.5999H29.12Z"}))), (jsx("path", ({d:"M38.08 11.5999V0.399902H44.8V2.6399H40.32V4.8799H44.8V7.1199H40.32V9.3599H44.8V11.5999H38.08Z"}))), (jsx("path", ({d:"M47.04 4.8799V0.399902H49.28V4.8799H47.04ZM53.76 4.8799V0.399902H56V4.8799H53.76ZM49.28 7.1199V4.8799H53.76V7.1199H49.28ZM47.04 11.5999V7.1199H49.28V11.5999H47.04ZM53.76 11.5999V7.1199H56V11.5999H53.76Z"}))), (jsx("title", ({}), (jsx(Fragment, ({}), "Reflex"))))))))))))))),"""
+        """onError:((_error, _info) => (addEvents([(Event("reflex___state____state.reflex___state____frontend_event_exception_state.handle_frontend_exception", ({ ["info"] : ((((_error["name"]+": ")+_error["message"])+"\\n")+_error["stack"]), ["component_stack"] : _info["componentStack"] }), ({  })))], [_error, _info], ({  }))))"""
         "},"
         'jsx(RadixThemesText,{as:"p"},'
         "jsx(RadixThemesColorModeProvider,{},"
