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react-state-effects

1.0.4
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  • License MIT

React useState hook enhanced with side effects

Package Exports

  • react-state-effects

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (react-state-effects) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

React useStateEffects hook

Allows excecution of side effects immediately after state is set by setState hook.

Example

import useStateEffects from 'react-state-effects';

const Example = ({ callback, children }) => {
  const [state, setState] = useStateEffects(1);

  React.useEffect(() => {
    setState(state$ => [state$ + 1, callback]);
  }, [])

  return children;
}

setState could accept zero, one or multiple callbacks:

const cb1 = () => {...}
const cb2 = () => {...}

setState(state => [state + 1]);
setState(state => [state + 1, cb1]);
setState(state => [state + 1, cb1, cb2]);

In case current state is needed within callback, latest state could be injected by saving it within ref:

import useStateEffects from 'react-state-effects';

const Example = ({ callback, children }) => {
  const [state, setState] = useStateEffects(1);
  const stateRef = React.useRef(state);

  React.useEffect(() => {
    setState(state$ => [state$ + 1, () => callback(stateRef.current)]);
  }, [])

  React.useEffect(() => {
    stateRef.current = state;
  }, [state])

  return children;
}