What does `rules of hooks` do and when should you use it?

Summary

The Rules of Hooks require hooks to be called at the top level of React components or custom hooks, in the same order every render.

Longer Answer

React associates hook state with call order. If a hook is called conditionally, inside a loop, after an early return, or inside an ordinary function, later renders can shift hook positions and corrupt state or throw hook-order errors.

The practical fix is to call hooks unconditionally and put conditions inside the hook body/effect or after the hooks. ESLint rules catch most violations before runtime.

Key Points

• React associates hook state with call order
• If a hook is called conditionally, inside a loop, after an early return, or inside an ordinary function, later renders can shift hook positions and corrupt state or throw hook-order errors
• The practical fix is to call hooks unconditionally and put conditions inside the hook body/effect or after the hooks
• For 'What does rules of hooks do and when should you use it?', the key is to explain what problem the concept solves, where it fits in React's rendering model, and what mistake causes production bugs.

The practical fix is to call hooks unconditionally and put conditions inside the hook body/effect or after the hooks. ESLint rules catch most violations before runtime

Comparison / Tradeoffs

The practical fix is to call hooks unconditionally and put conditions inside the hook body/effect or after the hooks. ESLint rules catch most violations before runtime. |

Summary

The Rules of Hooks require hooks to be called at the top level of React components or custom hooks, in the same order every render.

Longer Answer

For 'What does rules of hooks do and when should you use it?', the key is to explain what problem the concept solves, where it fits in React's rendering model, and what mistake causes production bugs.

The practical fix is to call hooks unconditionally and put conditions inside the hook body/effect or after the hooks. ESLint rules catch most violations before runtime.

Key Points

• For 'What does rules of hooks do and when should you use it?', the key is to explain what problem the concept solves, where it fits in React's rendering model, and what mistake causes production bugs
• The practical fix is to call hooks unconditionally and put conditions inside the hook body/effect or after the hooks
• ESLint rules catch most violations before runtime
• Use the answer to connect the concept back to a realistic production or interview scenario for 'What does rules of hooks do and when should you use it?'

Comparison / Tradeoffs