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| function applyMiddleware(...middlewares) { | |
| return (createStore) => (reducer, ...args) => { | |
| const store = createStore(reducer, ...args) | |
| let dispatch; | |
| const middlewareAPI = { | |
| getState: store.dispatch, | |
| dispatch: (action, ...args) => dispatch(action, ...args) | |
| } | |
| const chain = middlewares.map(middleware => middleware(middlewareAPI)) | |
| dispatch = compose(...chain)(store.dispatch) | |
| return { | |
| ...store, | |
| dispatch | |
| } | |
| } | |
| } |
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| function compose(...funcs) { | |
| if (funcs.length === 0) return arg => arg | |
| if (funcs.length === 1) return funcs[0] | |
| return funcs.reduce( (a, b) => (...args) => a(b(...args))) | |
| } |
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