react Errors

101 entries

Error Code Domain Category Fix Rate Confidence Tier
Warning: An update to X inside a test was not wrapped in act(...) — react test_error 88% 90% ai_generated
Module not found: Can't resolve 'react/jsx-runtime' — react build_error 92% 90% ai_generated
Module not found: Can't resolve 'react-dom/client' — react module_error 95% 95% ai_generated
TypeError: Cannot read properties of null (reading 'useContext') — react hook_error 90% 90% ai_generated
TypeError: Cannot read properties of undefined (reading 'map') — react data_error 95% 95% ai_generated
Cannot update a component while rendering a different component — react render_error 82% 85% ai_generated
TypeError: Cannot read properties of undefined (reading 'dispatch'). useContext must be used within a Provider — react context 96% 97% ai_generated
Cannot destructure property 'X' of useContext(...) as it is null/undefined — react context_error 92% 92% ai_generated
Warning: A component is changing an uncontrolled input to be controlled — react state_error 92% 92% ai_generated
Warning: Each child in a list should have a unique 'key' prop — react render_warning 95% 95% ai_generated
Warning: forwardRef render functions accept exactly two parameters: props and ref — react deprecation_warning 90% 92% ai_generated
Error: Invalid hook call. Hooks can only be called inside of the body of a function component. (class component) — react hook_error 90% 92% ai_generated
Error: Rendered more hooks than during the previous render — react hooks 95% 96% ai_generated
Hydration failed because the server rendered HTML didn't match the client. — react hydration_error 85% 88% ai_generated
Warning: Invalid DOM property 'class'. Did you mean 'className'? — react jsx_error 98% 95% ai_generated
Invalid hook call. Hooks can only be called inside the body of a function component — react hook_error 85% 88% ai_generated
Type 'Element | undefined' is not assignable to type 'ReactElement' (JSX return type) — react type_error 90% 92% ai_generated
Error: Maximum update depth exceeded. This can happen when a component calls setState inside useEffect — react rendering 95% 96% ai_generated
Error: Maximum update depth exceeded. This can happen when a component calls setState inside useEffect without dependencies. — react render_error 92% 92% ai_generated
Minified React error #XXX; visit https://reactjs.org/docs/error-decoder.html — react runtime_error 85% 85% ai_generated
Error: Objects are not valid as a React child — react render_error 90% 92% ai_generated
Warning: An update to Component inside a test was not wrapped in act(...) — react testing_error 87% 91% ai_generated
Too many re-renders. React limits the number of renders to prevent an infinite loop. — react render_error 90% 93% ai_generated
Warning: Can't perform a React state update on an unmounted component. — react lifecycle_error 89% 92% ai_generated
TypeError: Cannot read properties of undefined (reading 'value') — react context_error 92% 94% ai_generated
Warning: Encountered two children with the same key, `keyValue`. Keys should be unique so that components maintain their identity across updates. — react render_warning 93% 95% ai_generated
The above error occurred in the <ComponentName> component. Consider adding an error boundary to your tree to customize error handling behavior. — react error_handling 88% 90% ai_generated
Warning: Function components cannot be given refs. Attempts to access this ref will fail. Did you mean to use React.forwardRef()? — react ref_error 91% 93% ai_generated
Warning: Prop `className` did not match. Server: "server-class" Client: "client-class" — react hydration_error 86% 89% ai_generated
Error: Loading chunk X failed. (missing: https://example.com/static/js/chunk.hash.js) — react code_splitting_error 84% 87% ai_generated
Component re-renders despite React.memo wrapper. Custom comparison function returns incorrect results. — react performance_error 85% 87% ai_generated
Error: Target container is not a DOM element. (createPortal) — react dom_error 91% 93% ai_generated
TypeError: dispatch is not a function — react state_management_error 90% 92% ai_generated
TypeError: Cannot read properties of null (reading 'focus'). Ref callback receives null on unmount. — react ref_error 89% 91% ai_generated
Error: No routes matched location "/some/path" — react routing_error 92% 94% ai_generated
Component renders twice in development. useEffect cleanup runs immediately after mount. API called twice on component mount. — react development_behavior 88% 92% ai_generated
Error: A component suspended while responding to synchronous input. This will cause the UI to be replaced with a loading indicator. To fix, updates that suspend should be wrapped with startTransition. — react rendering_error 90% 92% ai_generated
Warning: Cannot update a component (`X`) while rendering a different component (`Y`). To locate the bad setState() call, follow the stack trace. / Tearing detected in useSyncExternalStore. — react state_management_error 85% 88% ai_generated
Rendered more hooks than during the previous render — react hook_error 90% 90% ai_generated
Warning: Text content did not match. Server: 'X' Client: 'Y' — react hydration_error 88% 90% ai_generated
Error: Too many re-renders. React limits the number of renders to prevent an infinite loop — react render_error 88% 90% ai_generated
useEffect must not return anything besides a function, which is used for clean-up — react hooks_error 95% 95% ai_generated
Warning: Can't perform a React state update on an unmounted component — react lifecycle_error 90% 90% ai_generated
React Hook useEffect has a missing dependency — react hook_warning 85% 88% ai_generated
TypeError: Cannot read properties of null (reading 'useCallback') — react runtime_error 85% 85% ai_generated
Error: Invariant failed: You should not use <NavLink> outside a <Router> — react runtime_error 95% 88% ai_generated
Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function. — react runtime_error 90% 87% ai_generated
Error: Cannot update during an existing state transition (such as within `render`). Render methods should be a pure function of props and state. — react runtime_error 95% 88% ai_generated
TypeError: Cannot read properties of undefined (reading 'params') — react type_error 90% 86% ai_generated
Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full details about the error. 418 react runtime_error 90% 87% ai_generated
Warning: State update from an outdated closure. The value you are accessing is stale. — react runtime_error 85% 88% ai_generated
Error: Context provider is missing a 'value' prop. The context will receive undefined. — react runtime_error 95% 87% ai_generated
React Hook useEffect has a missing dependency: 'variable'. Either include it or remove the dependency array. — react build_error 90% 85% ai_generated
Error: Target container is not a DOM element. When using createPortal, the second argument must be a valid DOM node. — react runtime_error 88% 86% ai_generated
Error: The above error occurred in the <ComponentName> component. Consider adding an error boundary to your tree to customize error handling. — react runtime_error 75% 84% ai_generated
Warning: A stale closure was detected. The callback passed to useCallback references a variable that may be outdated. — react runtime_error 90% 85% ai_generated
Attempted import error: 'ComponentName' is not exported from './module' (imported as 'ComponentName') — react module_error 90% 85% ai_generated
Error: The context value for 'MyContext' is undefined. Did you forget to wrap your component in a Provider with a value? — react runtime_error 90% 85% ai_generated
TypeError: Cannot read properties of null (reading 'focus') — react runtime_error 90% 85% ai_generated
TypeError: Cannot read properties of null (reading 'useState') — react runtime_error 88% 85% ai_generated
Warning: unstable_flushDiscreteUpdates: Cannot flush updates when React is already rendering. — react runtime_error 85% 82% ai_generated
Minified React error #329; visit https://reactjs.org/docs/error-decoder.html?invariant=329 for the full message or use the non-minified dev environment for full errors. 329 react runtime_error 87% 83% ai_generated
Error: Invalid hook call. Hooks can only be called inside the body of a function component. This could happen for one of the following reasons: 1. You might have mismatching versions of React and the renderer (such as React DOM) 2. You might be breaking the Rules of Hooks 3. You might have more than one copy of React in the same app — react runtime_error 90% 88% ai_generated
TypeError: Cannot read properties of undefined (reading 'setState') — react runtime_error 92% 86% ai_generated
Warning: ReactDOM: Expected `dangerouslySetInnerHTML` to be a string, but got `object` instead. — react runtime_error 93% 84% ai_generated
Error: Too many re-renders. React limits the number of renders to prevent an infinite loop. — react runtime_error 92% 89% ai_generated
Warning: forwardRef render functions accept exactly two parameters: props and ref. Did you mean to pass a ref? — react runtime_error 85% 88% ai_generated
Warning: useEffect must not return anything besides a function, which is used for clean-up. You returned: undefined — react runtime_error 90% 90% ai_generated
Warning: Component renders twice in development. useEffect cleanup runs immediately after mount. API called twice on component mount. — react runtime_error 75% 82% ai_generated
Warning: A component is changing an uncontrolled input to be controlled. This is likely caused by the value changing from undefined to a defined value. — react runtime_error 92% 87% ai_generated
Error: The above error occurred in the <ComponentName> component. Consider adding an error boundary to your tree to customize error handling behavior. — react runtime_error 80% 85% ai_generated
Attempted import error: 'ComponentName' is not exported from './module' — react module_error 92% 85% ai_generated
TypeError: X is not a function. (In 'X()', 'X' is undefined) when using .map on children — react type_error 93% 88% ai_generated
Error: Maximum update depth exceeded. This can happen when a component calls setState inside useEffect, but useEffect either doesn't have a dependency array, or one of the dependencies changes on every render. — react runtime_error 88% 90% ai_generated
TypeError: Cannot read properties of undefined (reading 'value') when accessing context — react runtime_error 94% 87% ai_generated
TypeError: Cannot read properties of null (reading 'focus') when using ref callback — react runtime_error 90% 85% ai_generated
Hydration failed because the server rendered HTML didn't match the client. Specifically, attribute 'data-server-value' mismatch. — react runtime_error 91% 86% ai_generated
Warning: Each child in a list should have a unique 'key' prop. See https://reactjs.org/link/warning-keys for more information. — react runtime_error 95% 85% ai_generated
Warning: A stale closure was detected. The callback passed to useEffect references a variable that may be outdated. — react runtime_error 90% 85% ai_generated
Warning: Invalid DOM property `class`. Did you mean `className`? — react runtime_error 100% 90% ai_generated
Hydration failed because the initial UI does not match what was rendered on the server. Warning: Expected server HTML to contain a matching <div> in <div>. — react runtime_error 80% 85% ai_generated
TypeError: Cannot read properties of undefined (reading 'dispatch'). This error is located at: in ConsumerComponent (at App.js:10) — react runtime_error 95% 88% ai_generated
Type 'Element | undefined' is not assignable to type 'ReactElement<any, any> | null'. Type 'undefined' is not assignable to type 'ReactElement<any, any> | null'. — react type_error 85% 83% ai_generated
TypeError: Cannot read properties of null (reading 'focus'). This error is located at: in MyComponent (at App.js:15) — react runtime_error 88% 84% ai_generated
Warning: forwardRef render functions accept exactly two parameters: props and ref. Did you mean to use React.forwardRef? — react runtime_error 92% 86% ai_generated
Warning: A component is changing a controlled input to be uncontrolled (or vice versa). Input elements should not switch from controlled to uncontrolled (or vice versa). Decide between using a controlled or uncontrolled input element for the lifetime of the component. — react runtime_error 88% 85% ai_generated
Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Check the render method of `App`. — react runtime_error 85% 82% ai_generated
TypeError: Cannot read properties of null (reading 'Provider') — react runtime_error 85% 80% ai_generated
Warning: useEffect must not return anything besides a function, which is used for clean-up. You returned: undefined. — react runtime_error 90% 85% ai_generated
TypeError: Cannot read properties of null (reading 'current') — react runtime_error 87% 83% ai_generated
Warning: Encountered two children with the same key, `duplicate`. Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and could change in a future version. — react runtime_error 95% 85% ai_generated
TypeError: Cannot read properties of undefined (reading 'dispatch') — react runtime_error 92% 88% ai_generated
Error: Maximum update depth exceeded. This can happen when a component calls setState inside useEffect without a dependency array — react runtime_error 95% 90% ai_generated
Warning: forwardRef render functions accept exactly two parameters: props and ref. Did you accidentally pass children as a separate prop? — react runtime_error 90% 85% ai_generated
Warning: useEffect must not return anything besides a function, which is used for clean-up. It looks like you wrote useEffect(async () => ...) or returned a Promise. — react runtime_error 92% 88% ai_generated
Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons: 1. You might have mismatching versions of React and the renderer (such as React DOM) 2. You might be breaking the Rules of Hooks 3. You might have more than one copy of React in the same app. — react runtime_error 93% 90% ai_generated
Warning: React.memo: The comparison function returned true for props that are not equal. This may cause the component to skip rendering when it should update. — react runtime_error 90% 85% ai_generated
Error: The portal container is not a valid DOM element. Make sure the container element exists before calling createPortal. — react runtime_error 92% 87% ai_generated
An effect function must not return anything besides a function, which is used for clean-up. You returned: undefined — react runtime_error 92% 90% ai_generated
React Hook useEffect has a missing dependency: 'data'. Either include it or remove the dependency array. — react runtime_error 85% 87% ai_generated
Error: Invariant failed: You should not use <Link> outside a <Router> — react runtime_error 90% 88% ai_generated