# TypeError: Cannot read properties of undefined (reading 'value') when accessing context

- **ID:** `react/context-value-undefined-in-provider`
- **Domain:** react
- **Category:** runtime_error
- **Verification:** ai_generated
- **Fix Rate:** 94%

## Root Cause

A component consumes a context using useContext but the corresponding Provider is missing, or the Provider does not supply a 'value' prop, resulting in undefined context value.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| React 18.2.0 | active | — | — |
| React 17.0.2 | active | — | — |

## Workarounds

1. **Ensure the component consuming the context is wrapped in the corresponding Provider component with a 'value' prop.** (95% success)
   ```
   Ensure the component consuming the context is wrapped in the corresponding Provider component with a 'value' prop.
   ```
2. **Add a null/undefined check before accessing properties on the context value to provide a fallback UI or default value.** (85% success)
   ```
   Add a null/undefined check before accessing properties on the context value to provide a fallback UI or default value.
   ```

## Dead Ends

- **** — If the consumer tries to access nested properties that aren't in the default value, it still throws undefined errors. (60% fail)
- **** — Even if the Provider is present, importing a different context instance means the consumer doesn't see the provided value. (75% fail)