Question
Where in the source is useState defined?
Where in the source is useState defined?
About facebook/react · 2 messages · last activity 6/7/2026
RepoPilot
Based on the repository data available, I can tell you that the provided data doesn't contain the source code location where useState is actually defined. The data shows that useState is imported from the 'react' package in multiple playground files (e.g., [compiler/apps/playground/components/StoreContext.tsx:L9]), but the core implementation files are not included in the retrieved data.
According to the repository structure mentioned in the data, useState would be defined in the react package ([.claude/instructions.md:L14-L25] identifies it as one of the key packages with the purpose "Core React library"), but the exact file path and line numbers are not shown in the available excerpts.
To find the actual implementation, you would need to look in the packages/react/src/ directory of the facebook/react repository, likely in a file related to hooks implementation, but I cannot cite specific line numbers without that information being present in the data.
FOLLOW_UPS:
- What is the structure of the packages directory?
- How does React's hook system work internally?
- Where are other core hooks like useEffect defined?
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