reactive-atom v1.0.4

REACT ATOM

A state management library for React, follows bottom-up model ( similar with Jotai ), simple, zero-boilerplate setup, not depend to React framework ( can be used without React ). Basically you can easily define a piece of reactive data ( ATOM ) and use them anywhere in your React application, you can even compose multipe ATOMs to create another ATOM ( ATOM composition ). React-atom also include advance features like selector/piping for even more flexibility...

Examples

Basic usage

graph LR
U[/From anywhere/] -- update -->A((Atom A)) -- Notify --> B[useAtom hook] -- Re-render--> C[Component]

const atomA = new Atom<number>(1);

const Component = () => {
	const [a, setA] = useAtom(atomA);
	return <div>  
		a = {a}  
		<button onClick={() => {  
			setA(a+1);  
		}}>  
			Increase a  
		</button>  
	</div>
}

Compose Atom

graph LR
U[/From anywhere/]
U -- update --> A((Atom A)) 
U -- update --> B((Atom B)) -- recalculate --> AB((Atom A+B))
A -- recalculate --> AB
AB -- Notify --> H["useAtom(AB)"] -- Re-render--> C[Component]
A -- Notify --> HA["useAtom(A)"] -- Re-render --> C

export const atomA = new Atom<number>(1);  
export const atomB = new Atom<number>(2);
const defaultSelector = a => a;
  
export const atomAB = new ComposeAtom<number>(  
	[atomA, atomB],  
	[defaultSelector, defaultSelector],  
	(a: number, b: number) => {  
		console.log("calculate A + B");  
		return a + b;  
	},  
);

useAtom with selector

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Batching multiple updates on atom

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Batching multiple recalculate on compose atom

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Piping atom data with RXJS

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