Utils

mappedAtom

function mappedAtom<Part, Whole>(
	sourceAtom: Atom<Whole>,
	map: (w: Whole) => Part,
)

Returns a readonly atom whose value is derived by the map function.

flattenedAtom

function flattenedAtom<Value, Args extends unknown[], Result>(
	atomAtom: Atom<WritableAtom<Value, Args, Result>>,
)

Returns the atom (getter and setter) that is wrapped inside another atom.

resolvedAtom

function resolvedAtom<Reference, Value, Args extends unknown[], Result>(
	referenceAtom: Atom<Reference>,
	valueFactory: (reference: Reference) => WritableAtom<Value, Args, Result>,
)

referenceAtom is the atom containing the reference to be resolved. valueFactory is a function taking the current value of referenceAtom and returning an atom corresponding to the resolved reference.

const store = createStore()
store.get(currentAtom) // { id: 'a', name: 'A' }
store.set(currentAtom, { id: 'a', name: 'a' })
store.get(registerAtom) /* [
	{ id: 'a', name: 'a' },
	{ id: 'b', name: 'B' },
] */