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General reactive JavaScript programming using the idea of React Hooks.
Even though React Hooks are actually a constrained solution for using state and managing side effects in functional stateless components, they have proven to be very elegant in their design. I wanted to use this kind of reactive programming in areas other than React development, so I wrote Batis.
Batis essentially revolves around the concept of a Hook and its host. Running a functional stateless Hook requires a host that manages the state and effects and reports asynchronous state changes that should result in a new run.
npm install batis
import {Host, useEffect, useLayoutEffect, useMemo, useState} from 'batis';
function useGreeting(salutation) {
const [name, setName] = useState(`John`);
useLayoutEffect(() => {
setName(`Jane`);
}, []);
useEffect(() => {
// Unlike React, Batis always applies all state changes, whether
// synchronous or asynchronous, in batches. Therefore, Janie is not
// greeted individually.
setName(`Janie`);
setName((prevName) => `${prevName} and Johnny`);
const handle = setTimeout(() => setName(`World`), 0);
return () => clearTimeout(handle);
}, []);
return useMemo(() => `${salutation} ${name}!`, [salutation, name]);
}
const greeting = new Host(useGreeting);
console.log(greeting.run(`Hi`));
console.log(greeting.rerun());
greeting.reset();
console.log(greeting.run(`Bye`));
console.log(greeting.rerun());
await greeting.nextAsyncStateChange;
console.log(greeting.run(`Hello`));
[ 'Hi Jane!', 'Hi John!' ]
[ 'Hi Janie and Johnny!' ]
[ 'Bye Jane!', 'Bye John!' ]
[ 'Bye Janie and Johnny!' ]
[ 'Hello World!' ]
The React Hooks API reference also applies to this library and should be consulted.
Below you can see the subset of React Hooks implemented by Batis:
React Hook | Status |
---|---|
useState | ✅Implemented |
useEffect | ✅Implemented |
useLayoutEffect | ✅Implemented |
useMemo | ✅Implemented |
useCallback | ✅Implemented |
useRef | ✅Implemented |
useReducer | ✅Implemented |
useContext | ❌Not implemented |
useImperativeHandle | ❌Not implemented |
useDebugValue | ❌Not implemented |
FAQs
General reactive JavaScript programming using the idea of React Hooks.
The npm package batis receives a total of 6 weekly downloads. As such, batis popularity was classified as not popular.
We found that batis demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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