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vs-react-store

v0.0.16

Published

Стор реакта на хуках

Readme

vs-react-store

Стор для [email protected] на "новом" контексте и хуках

Установка

npm install --save vs-react-store

Использование

1. Создание редьюсера (createReducer)

createReducer принимает два аргумента

  • функция, возвращающая начальное состояние стора
  • экшены
  • необязательный коллбэк, вызывающийся при измненении стора
import { createReducer } from 'vs_react_store';

type StoreType = {
  some_number: number;
  some_string: string;
};

const CHANGE_SOME_NUMBER = 'CHANGE_SOME_NUMBER';
const CHANGE_SOME_STRING = 'CHANGE_SOME_STRING';

const default_value = {
  some_number: 1,
  some_string: 'i wanna be the guy',
};

const reducer = createReducer<StoreType>(
  () => {
    // возвращает дефолтное (начальное) значение стора
    return default_value;
  },
  {
    [CHANGE_SOME_NUMBER]: (state, action) => {
      return {
        ...state,
        some_number: action.payload.some_number,
      }
    },
    [CHANGE_SOME_STRING]: (state, action) => {
      return {
        ...state,
        some_string: action.payload.some_string,
      }
    },
  },
  (state) => {
    console.info('state is changed');
  },
);

Инициализация провайдера/ стора (createVsProvider)

Стор строится на контексте реакта, который в свою очередь используется хук React.useReducer По сути createVsProvider прокидывает аргументы в параметры хука

Таким образом (на текущий момент) createVsProvider имеет 1 обязательный параметра (React.useReducer (reducer))

Далее необходимо поместить провайдер в корень вашего приложения

const VsStoreProvider = createVsProvider(reducer);

const AppWrap = () => {
  return (
    <VsStoreProvider>
      <App />
    </VsStoreProvider>
  );
};

Получение данных их стора (useSelector)

Для получения данных из стора используется хук useSelector

const selectSomeKey = (state: StoreType) => state.some_number;

const App = React.memo(
  () => {
    const some_number = useSelector(selectSomeKey);

    return (
      <span>{some_number}</span>
    );
  },
);

Изменение данных в сторе (useDispatch)

Для изменения данных из стора используется хук useDispatch

const selectSomeKey = (state: StoreType) => state.some_number;

const changeSomeNumber = (number) => ({
  type: CHANGE_SOME_NUMBER,
  payload: {
    some_number,
  },
});

const App = React.memo(
  () => {
    const dispatch = useDispatch();
    const some_number = useSelector(some_number);

    return (
      <span onClick={() => dispatch(changeSomeNumber(some_number + 1))}>{some_number}</span>
    );
  },
);