[英]Using react redux with next.js
我嘗試將 Redux 與next.js 啟動項目一起使用,並且我在該項目上安裝了next-redux-wrapper
但我不確定該項目中的根文件在哪里。
我嘗試按照next-redux-wrapper上顯示的教程進行操作,但沒有成功。 沒變化。
請幫助我如何將 Redux 添加到項目中。
問候。
Next.js 使用 App 組件來初始化頁面。 您可以覆蓋它並控制頁面初始化。
雖然這個演示是針對 next.js 的,但它應該適用於 nextjs-starter。
安裝 next-redux-wrapper:
npm install --save next-redux-wrapper
將_app.js
文件添加到./pages
目錄:
// pages/_app.js
import React from "react";
import {createStore} from "redux";
import {Provider} from "react-redux";
import App, {Container} from "next/app";
import withRedux from "next-redux-wrapper";
const reducer = (state = {foo: ''}, action) => {
switch (action.type) {
case 'FOO':
return {...state, foo: action.payload};
default:
return state
}
};
/**
* @param {object} initialState
* @param {boolean} options.isServer indicates whether it is a server side or client side
* @param {Request} options.req NodeJS Request object (not set when client applies initialState from server)
* @param {Request} options.res NodeJS Request object (not set when client applies initialState from server)
* @param {boolean} options.debug User-defined debug mode param
* @param {string} options.storeKey This key will be used to preserve store in global namespace for safe HMR
*/
const makeStore = (initialState, options) => {
return createStore(reducer, initialState);
};
class MyApp extends App {
static async getInitialProps({Component, ctx}) {
// we can dispatch from here too
ctx.store.dispatch({type: 'FOO', payload: 'foo'});
const pageProps = Component.getInitialProps ? await Component.getInitialProps(ctx) : {};
return {pageProps};
}
render() {
const {Component, pageProps, store} = this.props;
return (
<Container>
<Provider store={store}>
<Component {...pageProps} />
</Provider>
</Container>
);
}
}
export default withRedux(makeStore)(MyApp);
然后,可以簡單地連接實際的頁面組件:這個演示如何在頁面中連接index.js
。
import Link from "next/link";
import React from "react";
import {
Container,
Row,
Col,
Button,
Jumbotron,
ListGroup,
ListGroupItem
} from "reactstrap";
import Page from "../components/page";
import Layout from "../components/layout";
import { connect } from "react-redux";
class Default extends Page {
static getInitialProps({ store, isServer, pathname, query }) {
store.dispatch({ type: "FOO", payload: "foo" }); // component will be able to read from store's state when rendered
return { custom: "custom" }; // you can pass some custom props to component from here
}
render() {
return (
<Layout>content...</Layout>
);
}
}
export default connect()(Default);
有關詳細信息,請參閱文檔: next-redux-wrapper
這個問題需要更新:
"next": "12.1.4",
"next-redux-wrapper": "^7.0.5",
"redux-devtools-extension": "^2.13.9",
"redux-thunk": "^2.4.1"
import { createStore, applyMiddleware } from "redux";
import { HYDRATE, createWrapper } from "next-redux-wrapper";
import reducers from "./reducers/reducers";
import thunkMiddleware from "redux-thunk";
// middleware is an array
const bindMiddleware = (middleware) => {
if (process.env.NODE_ENV !== "production") {
const { composeWithDevTools } = require("redux-devtools-extension");
return composeWithDevTools(applyMiddleware(...middleware));
}
return applyMiddleware(...middleware);
};
// this is main reducer to handle the hydration
const reducer = (state, action) => {
// hydration is a process of filling an object with some data
// this is called when server side request happens
if (action.type === HYDRATE) {
const nextState = {
...state,
...action.payload,
};
return nextState;
} else {
// whenever we deal with static rendering or client side rendering, this will be the case
// reducers is the combinedReducers
return reducers(state, action);
}
};
const initStore = () => {
return createStore(reducer, bindMiddleware([thunkMiddleware]));
};
export const wrapper = createWrapper(initStore);
import { wrapper } from "../redux/store";
function MyApp({ Component, pageProps }) {
return <Component {...pageProps} />;
}
export default wrapper.withRedux(MyApp);
// sample action
import { getRooms } from "../redux/actions/roomActions";
import { wrapper } from "../redux/store";
export const getServerSideProps = wrapper.getServerSideProps(
(store) =>
// destructuring context obj
async ({ req, query }) => {
await store.dispatch(getRooms(req, query.page));
}
);
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