React ensures state consistency when hooks are used conditionally by following these rules:
1. Only Call Hooks at the Top Level:
- Hooks should be called at the top level of a React function, before any early returns. This ensures that Hooks are called in the same order each time a component renders, which allows React to correctly preserve the state of Hooks between multiple `useState` and `useEffect` calls[4].
2. Only Call Hooks from React Functions:
- Hooks should be called from React function components or custom Hooks. This ensures that all stateful logic in a component is clearly visible from its source code[4].
3. Use Hooks Wisely:
- Use Hooks wisely by avoiding unnecessary state updates and side effects. This can be achieved by using `useMemo` and `useCallback` to memoize functions and avoid unnecessary computations[1].
4. Use Context API:
- Use the Context API to share state between components. This allows you to manage state in a centralized location and access it from any component that needs it[1].
5. Use Refs:
- Use refs to access DOM nodes or other values that need to be accessed directly. This allows you to manage state and side effects in a more controlled manner[1].
6. Use Performance Hooks:
- Use performance hooks like `useMemo` and `useCallback` to optimize rendering performance. This allows you to skip unnecessary work and optimize rendering[1].
7. Use Resource Hooks:
- Use resource hooks like `useResource` to access resources without being part of their state. This allows you to manage state and side effects in a more controlled manner[1].
8. Use Custom Hooks:
- Use custom hooks to encapsulate complex logic and make your code more readable. This allows you to reuse stateful logic between different components[1].
By following these rules and best practices, you can ensure that your React application maintains state consistency even when hooks are used conditionally.
Citations:[1] https://www.geeksforgeeks.org/reactjs-hooks/
[2] https://legacy.reactjs.org/docs/hooks-intro.html
[3] https://www.smashingmagazine.com/2020/04/react-hooks-best-practices/
[4] https://legacy.reactjs.org/docs/hooks-rules.html
[5] https://react.dev/reference/react/hooks