import React from "react";
import { render } from "react-dom";
import App from "./App";
import { createStore } from "redux";
import { Provider } from "react-redux";
// まだ rootReducer がないのでエラーになる
const store = createStore(rootReducer);
render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById("root")
);
import React from "react";
const App = () => {
return <div>App</div>;
};
export default App;
const initialState = [1, 2, 3, 4, 5];
const imageUrls = (state = initialState, action) => {
switch (action.type) {
case "RECEIVE_DATA":
return "data";
default:
return state;
}
};
export default imageUrls;
import { combineReducers } from "redux";
import imageUrls from "./imageUrls";
export default combineReducers({ imageUrls });
import rootReducer from "./reducers";
const store = createStore(rootReducer);
// 正常に動いているか確認
console.log(store.getState());