react runtime_error ai_generated true

Error: Context provider is missing a 'value' prop. The context will receive undefined.

ID: react/context-provider-missing-value

Also available as: JSON · Markdown · 中文
95%Fix Rate
87%Confidence
1Evidence
2023-09-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
React 16.3.0 active — — —
React 17.0.2 active — — —
React 18.2.0 active — — —

Root Cause

A React Context Provider component is rendered without a 'value' prop, causing consuming components to receive undefined instead of the intended context value.

generic

中文

React Context Provider组件在渲染时缺少'value'属性，导致消费组件接收undefined而不是预期的上下文值。

Official Documentation

https://react.dev/reference/react/createContext#provider

Workarounds

  1. 95% success Ensure the Provider component always includes a 'value' prop, even if it's an empty object or a fallback. 
    Ensure the Provider component always includes a 'value' prop, even if it's an empty object or a fallback.
  2. 90% success If the value is dynamically computed, use a state variable and pass it as the value prop. 
    If the value is dynamically computed, use a state variable and pass it as the value prop.

中文步骤

  1. Ensure the Provider component always includes a 'value' prop, even if it's an empty object or a fallback.
  2. If the value is dynamically computed, use a state variable and pass it as the value prop.

Dead Ends

Common approaches that don't work:

  1. Adding a default value to createContext() to avoid undefined 70% fail

    The default value is only used when there is no Provider at all; if a Provider is present without value, the default is ignored and undefined is passed.

  2. Wrapping the Provider in a conditional to skip rendering if no value is available 60% fail

    This may hide the error but leads to missing context for consumers, causing runtime errors later.

  3. Setting value to null explicitly, thinking it's the same as missing 50% fail

    null is a valid value and will be passed; the error is specifically about the prop being absent, not its value.