Model atomik negara (Jotai, Recoil) nggawe negara global saka akeh unit cilik sing independen sing diarani atoms, dikomposisi saka ngisor menyang ndhuwur — anggane siji toko gedhe top-down (Redux) utawa konteks monolitik. Komponen nglanggan atom individual lan mung di-render maneh nalika kuwi owah.
{ atom, useAtom } ;
countAtom = ();
nameAtom = ();
Saben atom minangka bagean negara sing mandiri. Sampeyan nggawe pirang-pirang kaya na kahanane, saben bisa dialamat dhewe.
// a derived atom computes from other atoms; recomputes when its dependencies change
const doubleAtom = atom((get) => get(countAtom) * 2);
const greetingAtom = atom((get) => `Hello, ${get(nameAtom)}`);
// writable derived atom
const upperNameAtom = atom(
(get) => get(nameAtom).toUpperCase(),
(get, set, newVal) => set(nameAtom, newVal.toLowerCase()),
);
Atoms dadi komposisi ing grafik ketergantungan — atoms asilan kanthi otomatis dianyari nalika atoms sing dibacane owah, kaya spreadsheet.
function Counter() {
const [count, setCount] = useAtom(countAtom); // global, but useState-like API
return <button onClick={() => setCount(count + 1)}>{count}</button>;
}
function Display() {
const [double] = useAtom(doubleAtom); // re-renders ONLY when doubleAtom changes
}
Redux (top-down): one big state tree; you carve slices/selectors OUT of it
Atomic (bottom-up): start with tiny atoms; compose them UP into derived state
Granularity: each atom is independently subscribable → naturally fine-grained
re-renders (a component using countAtom ignores nameAtom changes)
✓ Fine-grained re-renders by default (subscribe to exactly the atoms you use)
✓ No selector boilerplate; derived state is just another atom
✓ Solves Context's "re-render everything" problem
✓ Great for state that's naturally decomposed into many independent pieces
✗ Many atoms can be harder to organize/trace than one centralized store
✗ Less rigid structure than Redux (a pro or con depending on the team)
Model atomik minangka pendekatan sing béda lan saya-saya populer kanggo negara global sing mbalikaké struktur top-down Redux: tinimbang motong toko gedhe, sampeyan nggawe atoms cilik saka ngisor menyang ndhuwur.
Granularitas barisan nggawe re-render sing efisien lan tepat nang, tanpa selector — langsung ngatasi masalah performance Context.
Nemahi atoms (lan atoms asilan) nambahi kawruh babagan design space manajemen negara, bebarengan karo model toko tunggal (Redux/Zustand) lan reaktif (MobX/Signals), membantu sampeyan milih paradigma sing paling pas kanggo bentuk negara aplikasi.
Pustaka pitakon wawancara IT kanthi jawaban rinci — saka Junior nganti Senior.
Nyumbang