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# `createReducer` | ||
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Factory for reducer hooks with custom middleware with an identical API as [React's `useReducer`](https://reactjs.org/docs/hooks-reference.html#usereducer). Compatible with [Redux middlware](https://redux.js.org/advanced/middleware). | ||
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## Usage | ||
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An example with [`redux-thunk`](https://github.com/reduxjs/redux-thunk) and [`redux-logger`](https://github.com/LogRocket/redux-logger). | ||
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```jsx | ||
import {createReducer} from 'react-use'; | ||
import thunk from 'redux-thunk'; | ||
import logger from 'redux-logger'; | ||
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const useThunkReducer = createReducer(thunk, logger); | ||
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function reducer(state, action) { | ||
switch (action.type) { | ||
case 'increment': | ||
return { count: state.count + 1 }; | ||
case 'decrement': | ||
return { count: state.count - 1 }; | ||
case 'reset': | ||
return init(action.payload); | ||
default: | ||
throw new Error(); | ||
} | ||
} | ||
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const Demo = () => { | ||
const addAndReset = React.useCallback(() => { | ||
return dispatch => { | ||
dispatch({ type: 'increment' }); | ||
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setTimeout(() => { | ||
dispatch({ type: 'reset', payload: 1 }); | ||
}, 1000); | ||
}; | ||
}, []); | ||
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const [count, dispatch] = useThunkReducer(reducer, 1); | ||
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return ( | ||
<div> | ||
<p>count: {count}</p> | ||
<button onClick={() => dispatch(addAndReset())}>Add and reset</button> | ||
<button onClick={() => dispatch({ type: 'increment' })}>+</button> | ||
<button onClick={() => dispatch({ type: 'decrement' })}>-</button> | ||
</div> | ||
); | ||
}; | ||
``` | ||
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## Reference | ||
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```js | ||
const useMiddlewareReducer = createReducer(...middlewares); | ||
``` |
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