createStore

Store<S> createStore<S>(

  1. Reducer<S> reducer,

  2. S preloadedState, {
  3. StoreEnhancer<S>? enhancer,
})

Creates a store that holds the state tree.

The only way to change the data in the store is to call dispatch() on it.

There should only be a single store in your app. To specify how different parts of the state tree respond to actions, combine several reducers into a single reducer function using combineReducers.

reducer A function that returns the next state tree, given the current state tree and the action to handle.

preloadedState The initial state. You may optionally specify it to hydrate the state from the server in universal apps, or to restore a previously serialized user session.

enhancer Optional store enhancer. Use applyMiddleware() to add middleware support.

Implementation

Store<S> createStore<S>(
  Reducer<S> reducer,
  S preloadedState, {
  StoreEnhancer<S>? enhancer,
}) => enhancer != null
    ? enhancer(_createStoreImpl, reducer, preloadedState)
    : _createStoreImpl(reducer, preloadedState);