- To avoid unnecessary
useEffect
calling, useuseRef
. - Prefer not update state at
useEffect
- If
useEffect
updates state, then the order ofuseEffect
matters, writing first, reading later.
- If
- Avoid reading and writing the same state from one
useCallback
.- If needed, read state from
useRef
.
- If needed, read state from
- Prefer to define util function inside
useEffect
scope. - If
useEffect
depends on function, ensure the function won't change.- If
useEffect
depending on a mutable function, useuseRef
.
- If
- use
useLocalState
oruseDerivedState
if it matches the requirement. - If multiple
useEffect
exists and depending on each other, replace it with class component. - Migrate from
enzyme
toreact-testing-library
.
hard-effect's Introduction
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