isomorphic-style-loader无法正常运行

编程问答 2022-08-16

问题描述

嘿，我正在做一个简单的react + SSR项目，其中包含了isomorphic-style loader。我按照分步指南进行了实施，如此处https://www.npmjs.com/package/isomorphic-style-loader所述，但它不起作用。我制作的样式没有显示。谁能指导我解决此问题？

这是我的webpack config 

var path = require('path');
var webpack = require('webpack');
var nodeExternals = require('webpack-node-externals');

var browserConfig = {
    entry: './src/browser/index.js',output: {
        path: path.resolve(__dirname,'public'),filename: 'bundle.js',publicPath: '/',},module: {
        rules: [
            { test: /\.(js)$/,use: 'babel-loader' },{
                test: /\.css$/,use: [
                    'isomorphic-style-loader',{
                        loader: 'css-loader',options: {
                            importLoaders: 1,'postcss-loader',],mode: 'production',plugins: [
        new webpack.DefinePlugin({
            __isBrowser__: 'true',}),};

var serverConfig = {
    entry: './src/server/index.js',target: 'node',externals: [nodeExternals()],output: {
        path: __dirname,filename: 'server.js',plugins: [
        new webpack.DefinePlugin({
            __isBrowser__: 'false',};

module.exports = [browserConfig,serverConfig];

这是我的index.js (server) 

import express from 'express';
import cors from 'cors';
import React from 'react';
import { renderToString } from 'react-dom/server';
import { StaticRouter,matchPath } from 'react-router-dom';
import serialize from 'serialize-javascript';
import StyleContext from 'isomorphic-style-loader/StyleContext';
import App from '../shared/App';
import routes from '../shared/routes';

const app = express();

app.use(cors());
app.use(express.static('public'));

app.get('*',(req,res,next) => {
    const css = new Set(); // CSS for all rendered React components
    const insertCss = (...styles) =>
        styles.forEach((style) => css.add(style._getCss()));

    const activeRoute = routes.find((route) => matchPath(req.url,route)) || {};
    const promise = activeRoute.fetchInitialData
        ? activeRoute.fetchInitialData(req.path)
        : Promise.resolve();

    promise
        .then((data) => {
            const context = { data };
            const markup = renderToString(
                <StyleContext.Provider value={{ insertCss }}>
                    <StaticRouter location={req.url} context={context}>
                        <App />
                    </StaticRouter>
                </StyleContext.Provider>
            );

            res.send(`
      <!DOCTYPE html>
      <html>
        <head>
          <title>SSR with RR</title>
          <script src="/bundle.js" defer></script>
          <script>window.__INITIAL_DATA__ = ${serialize(data)}</script>
          <style type="text/css">${[...css].join('')}</style>
        </head>

        <body>
          <div id="app">${markup}</div>
        </body>
      </html>
    `);
        })
        .catch(next);
});

app.listen(3000,() => {
    console.log(`Server is listening on port: 3000`);
});

这是我的index.js (browser) 

import React from 'react';
import { hydrate } from 'react-dom';
import App from '../shared/App';
import { BrowserRouter } from 'react-router-dom';
import StyleContext from 'isomorphic-style-loader/StyleContext';

const insertCss = (...styles) => {
    const removeCss = styles.map((style) => style._insertCss());
    return () => removeCss.forEach((dispose) => dispose());
};

hydrate(
    <StyleContext.Provider value={{ insertCss }}>
        <BrowserRouter>
            <App />
        </BrowserRouter>
    </StyleContext.Provider>,document.getElementById('app')
);

这是App.js内部的一个组件，它使用的css styling无效。

import React from 'react';
import { NavLink } from 'react-router-dom';
import style from './css/style.css';
import withStyles from 'isomorphic-style-loader/withStyles';

function Navbar() {
    const languages = [
        {
            name: 'All',param: 'all',{
            name: 'JavaScript',param: 'javascript',{
            name: 'Ruby',param: 'ruby',{
            name: 'Python',param: 'python',{
            name: 'Java',param: 'java',];

    return (
        <ul className='navbar'>
            {languages.map(({ name,param }) => (
                <li key={param}>
                    <NavLink
                        activeStyle={{ fontWeight: 'bold' }}
                        to={`/popular/${param}`}
                    >
                        {name}
                    </NavLink>
                </li>
            ))}
        </ul>
    );
}

export default withStyles(style)(Navbar);

解决方法

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