【问题标题】:How to integrate react-native web to an existing react native project如何将 react-native web 集成到现有的 react native 项目中
【发布时间】:2022-01-13 17:23:03
【问题描述】:

我们有一个使用 typescriptreact-navigationreact-native-gesture-handlerredux/toolkit 作为主要包实现的 react-native 项目

最近我们将 react-native-web 集成到我们的项目中,但它运行不正确。

我们的项目有几个问题:

  1. 我们在导入自定义模块时无法加载它们。例如:

    import MyCustomComponent from './components/MyCustomComponent'
    
    <View style={{flex: 1, backgroundColor: 'green'}}>
      <MyCustomComponent/>     <--- does not show up, event when it contains a simple View component, we will see a blank screen
    </View>
    

    但是当我在当前文件中定义MyCustomComponent 时,它显示没有问题:

    function MyCustomComponent() {
       return(
         <View style={{flex:1, backgroundColor: 'yellow'}}></View>
       )
    }
    
    export default function MyMainComponent() {
         return (
            <View style={{flex:1, backgroundColor: 'green'}}>
               <MyCustomComponent/>      <---- this shows up
            </View>
         )
    }
    
    
  2. redux Provider 中的任何内容都不会再显示了。

我认为我们的webpack 配置是错误的,但由于我不是网络开发专家,我需要一些帮助来找出问题所在。这是我们的 webpack 配置:

const path = require('path');

const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');

const appDirectory = path.resolve(__dirname);
const {presets} = require(`${appDirectory}/../babel.config.js`);

const compileNodeModules = [
  // Add every react-native package that needs compiling
  'react-native-gesture-handler',
  'react-redux',
  'react-native-reanimated',
  'react-native-confirmation-code-field',
  'react-native-calendars',
  '@react-native-google-signin/google-signin',
  'react-native-compressor',
  'react-native-swipe-gestures',
  '@react-native-async-storage',
  'react-native-shared-element',
  '@react-navigation',
  'react-native-material-menu',
  '@reduxjs/toolkit',
  'react-navigation-shared-element',
  'react-native-collapsible-tab-view',
  'react-native-image-crop-picker',
  '@react-native-community',
  'react-nativbe-safe-area-context/lib',
  'react-native-screens',
].map(moduleName =>
  path.resolve(appDirectory, `../node_modules/${moduleName}`),
);

const babelLoaderConfiguration = {
  test: /\.js$|tsx?$/,
  // Add every directory that needs to be compiled by Babel during the build.
  include: [
    path.resolve(__dirname, '../index.web.js'), // Entry to your application
    path.resolve(__dirname, '../src/index.web.tsx'), // Change this to your main App file
    path.resolve(__dirname, '../src'),
    ...compileNodeModules,
  ],
  use: {
    loader: 'babel-loader',
    options: {
      cacheDirectory: true,
      presets,
      plugins: ['react-native-web'],
    },
  },
};

const svgLoaderConfiguration = {
  test: /\.svg$/,
  use: [
    {
      loader: '@svgr/webpack',
    },
  ],
};

const tsLoaderConfiguration = {
  test: /\.(ts|tsx|web.ts|web.tsx)?$/,
  use: [
    {
      loader: 'ts-loader',
      options: {
        transpileOnly: true,
      },
    },
  ],
};

const imageLoaderConfiguration = {
  test: /\.(gif|jpe?g|png)$/,
  use: {
    loader: 'url-loader',
    options: {
      name: '[name].[ext]',
      esModule: false,
    },
  },
};

module.exports = {
  entry: {
    app: path.join(__dirname, '../index.web.js'),
  },
  output: {
    path: path.resolve(appDirectory, 'dist'),
    publicPath: '/',
    filename: 'arcelor.bundle.js',
  },
  resolve: {
    extensions: ['.web.tsx', '.web.ts', '.tsx', '.ts', '.web.js', '.js'],
    alias: {
      'react-native$': 'react-native-web',
    },
  },
  module: {
    rules: [
      babelLoaderConfiguration,
      imageLoaderConfiguration,
      svgLoaderConfiguration,
      tsLoaderConfiguration,
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, './index.html'),
      filename: 'index.html',
      inject: 'body',
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.DefinePlugin({
      // See: https://github.com/necolas/react-native-web/issues/349
      // __DEV__: JSON.stringify(true),
      __DEV__: process.env.NODE_ENV !== 'production',
      process: {env: {}},
    }),
  ],
};

我正在使用webpack@^5.65.0

谁能帮我找出问题所在以及如何让react-native-web 与我们的项目一起工作?谢谢

【问题讨论】:

    标签: reactjs react-native webpack redux-toolkit react-native-web


    【解决方案1】:

    从头开始启动和运行 Webpack 并不是一件容易的事。我建议您从准备使用的方法开始,例如craexpo。然后按照自己的方式进行定制。

    创建反应应用程序

    1. 首先,安装依赖:
    yarn add react-native-web react-scripts react-dom
    
    1. public/index.html中创建一个HTML文件,并在里面放入以下内容:gh:facebook/create-react-app/cra-template
    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="utf-8" />
        <meta
          name="viewport"
          content="width=device-width, initial-scale=1, shrink-to-fit=no"
        />
        <title>Your App Title</title>
      </head>
    
      <body>
        <noscript>You need to enable JavaScript to run this app.</noscript>
        <div id="root"></div>
      </body>
    </html>
    
    1. 将项目根目录中的index.js 重命名为index.native.jssee

    2. src/index.js创建一个js文件,里面放入如下内容:

    import { AppRegistry } from "react-native";
    import { App } from "./App";
    
    AppRegistry.registerComponent(appName, () => App);
    AppRegistry.runApplication("App", {
      rootTag: document.getElementById("root"),
    });
    
    1. 通过运行react-scripts start 运行应用程序

    定制

    您可能需要将 react-native-reanimated/plugin 之类的预处理器集成到您的 babel 配置中,或者编辑您的 WebPack 以添加诸如 process.env 之类的全局变量。为此,您可以使用react-scripts eject 访问上述配置或使用customize-cra 等工具。

    世博会(推荐)

    我的认为世博会是最好的方式。 Expo基本上是create-react-app,但对于支持react-native-webreact-native

    您可以按照official guide 为您的项目设置网络博览会。

    1. 安装依赖项:
    yarn add --global expo-cli
    expo install react-native-web react-dom
    yarn add expo
    
    1. 将您的根index.js 修改为如下内容:
    import { registerRootComponent } from 'expo';
    
    import App from './App';
    
    registerRootComponent(App);
    
    1. 此时您已准备就绪。生锈expo start:web

    定制

    通过运行expo customize:web,您可以访问 Babel 和 Webpack 配置文件。

    打字稿basePath

    如果您在tsconfig.json 中使用"baseUrl": "src"。您可能还需要设置 Babel。因为它可能不一定遵循您的 tsconfig。

    // babel.config.js
    module.exports = function (api) {
      api.cache(true);
      return {
        presets: ['babel-preset-expo'],
        plugins: [
          'react-native-reanimated/plugin',
          [
            'module-resolver',
            {
              root: ['src'],
              extensions: ['.tsx', 'json', '.ts', '.js'],
            },
          ],
        ],
      };
    };
    

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