前言:
好久没用 create-react-app做项目了,这次为了个h5项目,就几个页面,决定自己搭建一个(ps:mmp 好久没用,搭建的时候遇到一堆问题)。
我之前都是使用 umi 。后台管理系统的项目 使用 antd-pro框架。实际上antd-pro 是基于umi搭建集成的框架。里面封装好了各种东西,开箱即用。
如果不想暴露 eject 可以参考 :
react create-react-app v5 从零搭建项目 不暴露 eject
读本篇文章建议 打开 csdn的目录功能,可以让你更快捷的找到你需要的配置:
我的环境如下:
create-react-app v5
"axios": "^1.5.0",
"http-proxy-middleware": "^2.0.6",
"react": "^18.2.0",
"react-dom": "^18.2.0",
"react-router": "^6.16.0",
"react-router-dom": "^6.16.0",
v5刚出来没多久,v4的话问题就很少,基本稳定了!如果你不想用v5 可以安装指定版本的 create-react-app 。
搭建过程:
一、创建项目:
安装Node 和 npm: Node >= 14.0.0 和 npm >= 5.6
npx install -g create-react-app
npx create-react-app my-app
npx 不是拼写错误 —— 它是 npm 5.2+ 附带的 package 运行工具。
react 官网文档
二、配置各种必备的东西
npm start 运行 看到下图就说明项目创建成功了!
运行 npm run eject 此命令一旦运行不可逆!!!
如果不想 用这种方式可以参考:
react create-react-app v5 从零搭建项目 不运行 eject
配置less:
1.安装 less和less-loader
npm install less less-loader --save-dev
2.找到 config/webpack.config.js 添加less规则代码如下:
const lessRegex = /\.less$/;
const lessModuleRegex = /\.module\.less$/;
3.搜索oneOf,在oneOf数组中添加以下代码:
//less 配置
{
test: lessRegex,
exclude: lessModuleRegex,
use: getStyleLoaders(
{
importLoaders: 2,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
},
"less-loader"
),
sideEffects: true,
},
//less 模块化配置
{
test: lessModuleRegex,
use: getStyleLoaders(
{
importLoaders: 2,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
modules: {
getLocalIdent: getCSSModuleLocalIdent,
},
},
"less-loader"
),
},
要放到 sass-loader下面,位置不对可能不生效
我一开始放到了这里(错误示范)就不生效。
4.重新 npm start(修改 webpack.config.js里的东西 都要重新运行,别忘记保存!!!)
然后 直接 import ‘./App.less’ 或者 模块化引入 import styles from “./index.module.less”(当然 App.less 也要改成 App.module.less)。
看到 和 App.css运行的效果一样则说明配置成功。
配置路由:
1.下载 react-router-dom
npm install react-router-dom
2.App.js 里 写上如下代码:
import React from "react";
import { BrowserRouter, Routes, Route } from "react-router-dom";
import routes from './routes';
const App = () => {
console.log(routes)
return (
<BrowserRouter>
<Routes>
{routes.map((route) => (
<Route key={route.path} path={route.path} element={route.component} />
))}
{/* <Route path="*" element={<Home />} /> */}
</Routes>
</BrowserRouter>
);
};
export default App;
遇到 Uncaught TypeError: Cannot read properties of null (reading ‘useRef‘) 报错可以看:
react create-react-app 配置路由报错(Uncaught TypeError: Cannot read properties of null (reading ‘useRef‘))
3.index.js里写上:
import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
<React.StrictMode>
<App />
</React.StrictMode>
);
// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();
4.在src下新建一个 routes.js文件 写上:
// 导入你的页面组件
import Home from './pages';
//可以用 path:"*" 写个 404页面,我暂时不需要
const routes = [
{ path: "/", component: <Home/>}
];
export default routes;
运行看到 Home组件里的东西就说明成功了。之后可以在 scr/router.js里导入其他组件 写上 path和routers就行了。
注意:react-router-dom v6 和v5 api不太一样,比如 v5 把 Route 上是 component v6是element。具体写法 建议参考 你所用的版本 文档!
如果遇到了Uncaught TypeError: Cannot read properties of null (reading ‘useRef‘) 报错,可以看react create-react-app v5 配置路由(报错及注意事项)
配置axios:
1.安装 axios
cnpm install axios --save
2.src/utils 新建一个 request.js文件(没有utils就新建一个目录然后再建一个request.js)
3.request代码如下:
这个是最简单的配置了,你可以根据自己的需求配置 请求拦截里的东西。
import axios from 'axios'
// axios的配置文件, 可以在这里去区分开发环境和生产环境等全局一些配置
const devBaseUrl = 'http://api.k780.com/'
const proBaseUrl = 'http://xxxxx.com/'
// process.env返回的是一个包含用户的环境信息,它可以去区分是开发环境还是生产环境
export const BASE_URL = process.env.NODE_ENV === 'development' ? devBaseUrl : proBaseUrl
export const TIMEOUT = 5000
var request = axios.create({
baseURL:BASE_URL,//基准地址
timeout:TIMEOUT
})
//拦截请求
request.interceptors.request.use((config)=>{
return config
})
//拦截响应
request.interceptors.response.use((response)=>{
return response
},function (error){
//对响应的错误做点什么
return Promise.reject(error);
}
)
export default request;
使用时就是:
import request from "@/utils/request";
request.get("/api/fund_home/select_by_fund?fund=1001").then(res=>{
console.log(res);
})
当然 你也可以不叫 request 你可以叫 $axios 全看自己。
上面我给的配置说最简单的,一般来说 需要在 请求拦截里加上一些判断比如 错误提示,根据code值提示一下。可以借用 ui库的message组件 message.error(xxx)。还有 如果你需要加上token 还得统一加上token。
比如:我就在响应拦截里做了统一处理,status =200 并且 respnse.data.code=000000时才代表数据成功返回(这个需要根据你自己的接口规范来定)。否则 就需要 提示错误信息。Toast是antd-mobile里的,你可以根据自己需求变。
//拦截响应
request.interceptors.response.use(
(response) => {
console.log(response, "res");
if (response && response.status == "200") {
if (response.data && response.data.code == "000000") {
//接口成功才返回数据
return Promise.resolve(response.data);
} else {
Toast.show({
content: response.data&&response.data.message,
duration:2000,
position: "top",
});
}
}else{
return Promise.reject(response.message)
}
},
function (error) {
//对响应的错误做点什么
Toast.show({
content: '网络异常',
duration: 0,
position: 'top',
})
return Promise.reject(error);
}
);
还需呀注意的时使用 axios的时候一定要用catch捕获一下错误,要不然接口出错一定会导致页面直接有个遮罩层显示错误信息。
比如:
接口超时了,页面直接显示错误信息,但其实应该是显示页面才对,这样太影响用户体验了。
可以用的时候then后面加个catch,就不会直接显示在页面上了。
request
.get("/api/fund_home/select_by_fund", {
params: {
fund: "混合",
},
})
.then((res) => {
console.log(res);
})
// .catch((error) => {
// console.log(error);
// });
抽出到servers(模块化):
不过一般 项目里都会抽出来一个server模块(umi、antd-pro都是这样的),这样更加简洁。
1.在 src目录新建一个servers目录。
2.在 src/servers新建一个文件。
这个文件名 对应的就是模块名,比如:我现在写的是home页,那我就新建 home.js 。 后面写 其他模块就新建对应的js就行。
3.在 home.js里引入 封装好的 request,写上axios请求。
大致如下:你需要根据你自己的实际需求来写(@代表src,这个需要配置一下,如过你没配置就用相对路径引入就行)。
import request from "@/utils/request";
export function getList(params) {
return request({
url: "/api/fund_home/select_by_fund",
method: "get",
params
});
}
然后就可以在 home页里使用了。
import {getList} from "@/servers/home";
getList({fund:"混合"}).then((res) => {
console.log(res);
})
.catch((error) => {
console.log(error);
});
react axios配置
配置Proxy代理:
使用 http-proxy-middleware
1.安装http-proxy-middleware
npm install http-proxy-middleware --save
2.在src目录新建一个setupProxy.js
代码大致如下:
然后 请求接口时以/api/xx就会自动走代理。
const { createProxyMiddleware } = require('http-proxy-middleware');
module.exports = function(app) {
app.use(
'/api',
createProxyMiddleware({
target: 'http://localhost:8000',
changeOrigin: true,
// pathRewrite: {
// '^/api': '/',
// },
})
);
};
具体配置可以参考:React create-react-app 里配置代理(解决跨域)
配置 px2rem:
具体请看:react create-react-app v5配置 px2rem (暴露 eject方式)
配置别名 src可以用 @ :
1.在 config/webpack.config.js里搜索 alias 然后 加上
"@": paths.appSrc,
2.在 App.js里测试一下,引入 app的样式文件,我是 App.less。
import ‘@/App.less’;
3.重新运行 npm start 如果,样式确实生效了就说明,配置对了。
配置按需加载:
按需加载ui库时因为ui库是less写的样式,所以配置时,需要先配置 less,上文中有步骤,ui库按需加载建议看官网文档,都会有方法和步骤及注意事项,其实现在 很多 ui库都支持 Tree Shaking ,v5也支持所以只要是ui库支持,那么就不用配置按需加载!!!
Create React App v5 默认支持 Tree Shaking。Tree Shaking 是一项优化技术,用于在打包过程中只包含实际使用的代码,减少最终打包文件的体积。
在 Create React App v5 的构建配置中,通过使用 Babel 和 webpack 的相关插件和配置,可以自动启用 Tree Shaking 功能。
具体来说,Create React App v5 使用了以下插件和配置来支持 Tree Shaking:
Babel 默认配置:Create React App v5 的默认 Babel 配置中使用了 @babel/preset-env,它会根据目标浏览器的兼容性要求,自动转译代码并进行 Tree Shaking。
webpack 配置:Create React App v5 配置了优化选项 sideEffects: false,在 production 环境中默认启用了 Tree Shaking。这使得 webpack 在打包时可以识别出未使用的代码并进行排除。
总结来说,Create React App v5 默认启用了 Tree Shaking,以帮助优化打包文件的体积。你无需额外进行配置即可享受 Tree Shaking 的好处。
antd-mobile无需配置手动按需加载
antd-mobile 按需加载
其实 antd 高版本也自带按需加载 可以不用配置(下面的代码只是个 演示,你如果有其他 ui库 或者 插件需要按需加载可以按照下面的步骤来):
antd 官方链接 按需加载
react-vant 也是:
react-vant官网
如果你有其他插件需要配置可以参考这个步骤来:
这几种方式都需要 babel-plugin-import 支持,所以没有的话需要先安装!!!
webpack.config.js配置:
1.找到 config/webpack.config.js 然后 搜索 oneOf 在下面加一个配置,然后找到babel-loader(直接搜索babel-loader也行,然后找到js\jsx的配置),给起plugins加一个配置
plugins: [
// 添加以下配置
[
"import",
{
"libraryName": "react-vant",
"libraryDirectory": "es",
"style": true
}
]
]
完整配置:
{
test: /\.(js|mjs|jsx|ts|tsx)$/,
include: paths.appSrc,
loader: require.resolve('babel-loader'),
options: {
customize: require.resolve(
'babel-preset-react-app/webpack-overrides'
),
presets: [
[
require.resolve('babel-preset-react-app'),
{
runtime: hasJsxRuntime ? 'automatic' : 'classic',
},
],
],
plugins: [
isEnvDevelopment &&
shouldUseReactRefresh &&
require.resolve('react-refresh/babel'),
// 添加以下配置
[
"import",
{
"libraryName": "react-vant",
"libraryDirectory": "es",
"style": true
}
]
].filter(Boolean),
// This is a feature of `babel-loader` for webpack (not Babel itself).
// It enables caching results in ./node_modules/.cache/babel-loader/
// directory for faster rebuilds.
cacheDirectory: true,
// See #6846 for context on why cacheCompression is disabled
cacheCompression: false,
compact: isEnvProduction,
},
},
.babelrc里配置(推荐)
还可以按照antd-mobile 官网的方式来,就不需要在 webpack里配置了。可以使用 babel-plugin-import 来进行自动语法转换。可以在 .babelrc 中这样配置:
使用 .babelrc 文件进行配置需要确保项目的 Babel 版本在 7.x 及以上。如果你的项目使用的是较旧的 Babel 版本,则无法支持使用 .babelrc 进行配置,需要改用 babel.config.js 文件进行配置。
{
"plugins": [
["import", { "libraryName": "antd-mobile", "libraryDirectory": "es/components", "style": false}]
]
}
babel.config.js 这样配置:
module.exports 和export default应该都行。
package.json里babel配置(推荐)
1.在 package.json 文件中找到 “babel” 字段,如果没有请自行添加该字段。
2.在 “babel” 字段中添加 “plugins” 字段,并将 “plugins” 字段的值设置为一个数组,用于配置 babel 插件。
3.在 “plugins” 数组中添加 “import” 插件,并将其配置为按需加载。具体配置如下:
只添加 plugins就行,如果默认有其他配置,在后面加上就行。
{
"babel": {
"plugins": [
[
"import",
{
"libraryName": "react-vant",
"style": true
}
]
]
}
}
注意:
.babelrc里配置 和package.json 这两个方式会冲突,会报:
Parsing error: Multiple configuration files found. Please remove one:
package.json
D:\fund_demo.babelrc
这个错误通常是由于同时存在多个配置文件引起的,包括 package.json 和 .babelrc 等。Create React App 的默认配置中只支持使用一个配置文件来定义 Babel 相关的配置。
解决方案就是只保留一个配置:要不就直接在package.json里配置,要不就 把package.json的babel删掉都放在.babelrc.
静态资源图片之类的可以在src下新建assets目录:
在 src新建文件夹assets。然后新建img可以存放图片。 新建 js,css可以存放静态的js和css。
其实放public里也可以:
在create-react-app中,assets目录和public目录都可以用来存放静态资源,但它们之间有一些区别。
assets目录是我们自己创建的,通常放置一些与组件紧密相关的静态资源,如图片、样式文件等。这些资源在Webpack打包时会被处理和压缩,并与代码一起打包到最终的构建文件中。在组件中引用这些资源时,需要使用import关键字进行导入。
public目录是在创建React应用时默认生成的,用于放置一些通用的静态资源,如HTML文件、favicon.ico文件等。这些资源在Webpack打包时不会被处理和压缩,并且会被直接复制到最终的构建文件中。在组件中引用这些资源时,需要使用相对路径进行引用。
总的来说,assets目录和public目录都可以用来存放静态资源,但它们在处理和使用静态资源时有所不同。因此,我们需要根据实际情况选择合适的目录来存放静态资源。
大白话就是 ,public里的文件打包会直接被复制到 dist里,assets则不会。
打包部署到非根目录:
create-react-app v5 打包配置(部署到非根目录)
使用环境变量
react 使用环境变量的方法和步骤(dotenv-cli 实现使用环境变量步骤)
打包去掉 map文件
create-react-app 打包去掉 map文件
注意严格模式(StrictMode)会导致开发环境接口请求两次
React中StrictMode严格模式,导致开发环境,接口会请求两次或多次( useEffect 请求多次)
我的 webpack.config.js完整的配置:
你可以参考对比:文章来源:https://www.toymoban.com/news/detail-730137.html
'use strict';
const fs = require('fs');
const path = require('path');
const webpack = require('webpack');
const resolve = require('resolve');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const { WebpackManifestPlugin } = require('webpack-manifest-plugin');
const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
const WorkboxWebpackPlugin = require('workbox-webpack-plugin');
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
const ESLintPlugin = require('eslint-webpack-plugin');
const paths = require('./paths');
const modules = require('./modules');
const getClientEnvironment = require('./env');
const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
const ForkTsCheckerWebpackPlugin =
process.env.TSC_COMPILE_ON_ERROR === 'true'
? require('react-dev-utils/ForkTsCheckerWarningWebpackPlugin')
: require('react-dev-utils/ForkTsCheckerWebpackPlugin');
const ReactRefreshWebpackPlugin = require('@pmmmwh/react-refresh-webpack-plugin');
const createEnvironmentHash = require('./webpack/persistentCache/createEnvironmentHash');
//px2rem的配置
const px2rem = require("postcss-plugin-px2rem");
const px2remOpts = {
rootValue: 37.5, //这个值定义了1rem应该等于多少像素。在这里,1rem等于37.5
exclude: /(node_module)/, //这是一个正则表达式,用于指定哪些文件应该被排除在转换之外。在这里,所有在'node_module'目录下的文件都将被排除。
// mediaQuery: false, //这个选项表示是否应该在媒体查询中转换px单位。在这里,它被设置为false,意味着媒体查询中的px单位将不会被转换
// minPixelValue: 3, //这个选项表示应该转换的最小px值。在这里,只有px值大于或等于3的才会被转换
};
// Source maps are resource heavy and can cause out of memory issue for large source files.
const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
const reactRefreshRuntimeEntry = require.resolve('react-refresh/runtime');
const reactRefreshWebpackPluginRuntimeEntry = require.resolve(
'@pmmmwh/react-refresh-webpack-plugin'
);
const babelRuntimeEntry = require.resolve('babel-preset-react-app');
const babelRuntimeEntryHelpers = require.resolve(
'@babel/runtime/helpers/esm/assertThisInitialized',
{ paths: [babelRuntimeEntry] }
);
const babelRuntimeRegenerator = require.resolve('@babel/runtime/regenerator', {
paths: [babelRuntimeEntry],
});
// Some apps do not need the benefits of saving a web request, so not inlining the chunk
// makes for a smoother build process.
const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
const emitErrorsAsWarnings = process.env.ESLINT_NO_DEV_ERRORS === 'true';
const disableESLintPlugin = process.env.DISABLE_ESLINT_PLUGIN === 'true';
const imageInlineSizeLimit = parseInt(
process.env.IMAGE_INLINE_SIZE_LIMIT || '10000'
);
// Check if TypeScript is setup
const useTypeScript = fs.existsSync(paths.appTsConfig);
// Check if Tailwind config exists
const useTailwind = fs.existsSync(
path.join(paths.appPath, 'tailwind.config.js')
);
// Get the path to the uncompiled service worker (if it exists).
const swSrc = paths.swSrc;
// style files regexes
const cssRegex = /\.css$/;
const cssModuleRegex = /\.module\.css$/;
const sassRegex = /\.(scss|sass)$/;
const sassModuleRegex = /\.module\.(scss|sass)$/;
const lessRegex = /\.less$/;
const lessModuleRegex = /\.module\.less$/;
const hasJsxRuntime = (() => {
if (process.env.DISABLE_NEW_JSX_TRANSFORM === 'true') {
return false;
}
try {
require.resolve('react/jsx-runtime');
return true;
} catch (e) {
return false;
}
})();
// This is the production and development configuration.
// It is focused on developer experience, fast rebuilds, and a minimal bundle.
module.exports = function (webpackEnv) {
const isEnvDevelopment = webpackEnv === 'development';
const isEnvProduction = webpackEnv === 'production';
// Variable used for enabling profiling in Production
// passed into alias object. Uses a flag if passed into the build command
const isEnvProductionProfile =
isEnvProduction && process.argv.includes('--profile');
// We will provide `paths.publicUrlOrPath` to our app
// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
// Get environment variables to inject into our app.
const env = getClientEnvironment(paths.publicUrlOrPath.slice(0, -1));
const shouldUseReactRefresh = env.raw.FAST_REFRESH;
// common function to get style loaders
const getStyleLoaders = (cssOptions, preProcessor) => {
const loaders = [
isEnvDevelopment && require.resolve('style-loader'),
isEnvProduction && {
loader: MiniCssExtractPlugin.loader,
// css is located in `static/css`, use '../../' to locate index.html folder
// in production `paths.publicUrlOrPath` can be a relative path
options: paths.publicUrlOrPath.startsWith('.')
? { publicPath: '../../' }
: {},
},
{
loader: require.resolve('css-loader'),
options: cssOptions,
},
{
// Options for PostCSS as we reference these options twice
// Adds vendor prefixing based on your specified browser support in
// package.json
loader: require.resolve('postcss-loader'),
options: {
postcssOptions: {
// Necessary for external CSS imports to work
// https://github.com/facebook/create-react-app/issues/2677
ident: 'postcss',
config: false,
plugins: !useTailwind
? [
'postcss-flexbugs-fixes',
[
'postcss-preset-env',
{
autoprefixer: {
flexbox: 'no-2009',
},
stage: 3,
},
],
[
px2rem(px2remOpts)
],
// Adds PostCSS Normalize as the reset css with default options,
// so that it honors browserslist config in package.json
// which in turn let's users customize the target behavior as per their needs.
'postcss-normalize',
]
: [
'tailwindcss',
'postcss-flexbugs-fixes',
[
'postcss-preset-env',
{
autoprefixer: {
flexbox: 'no-2009',
},
stage: 3,
},
],
],
},
sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
}
}
].filter(Boolean);
if (preProcessor) {
loaders.push(
{
loader: require.resolve('resolve-url-loader'),
options: {
sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
root: paths.appSrc,
},
},
{
loader: require.resolve(preProcessor),
options: {
sourceMap: true,
},
}
);
}
return loaders;
};
return {
target: ['browserslist'],
// Webpack noise constrained to errors and warnings
stats: 'errors-warnings',
mode: isEnvProduction ? 'production' : isEnvDevelopment && 'development',
// Stop compilation early in production
bail: isEnvProduction,
devtool: isEnvProduction
? shouldUseSourceMap
? 'source-map'
: false
: isEnvDevelopment && 'cheap-module-source-map',
// These are the "entry points" to our application.
// This means they will be the "root" imports that are included in JS bundle.
entry: paths.appIndexJs,
output: {
// The build folder.
path: paths.appBuild,
// Add /* filename */ comments to generated require()s in the output.
pathinfo: isEnvDevelopment,
// There will be one main bundle, and one file per asynchronous chunk.
// In development, it does not produce real files.
filename: isEnvProduction
? 'static/js/[name].[contenthash:8].js'
: isEnvDevelopment && 'static/js/bundle.js',
// There are also additional JS chunk files if you use code splitting.
chunkFilename: isEnvProduction
? 'static/js/[name].[contenthash:8].chunk.js'
: isEnvDevelopment && 'static/js/[name].chunk.js',
assetModuleFilename: 'static/media/[name].[hash][ext]',
// webpack uses `publicPath` to determine where the app is being served from.
// It requires a trailing slash, or the file assets will get an incorrect path.
// We inferred the "public path" (such as / or /my-project) from homepage.
publicPath: paths.publicUrlOrPath,
// Point sourcemap entries to original disk location (format as URL on Windows)
devtoolModuleFilenameTemplate: isEnvProduction
? info =>
path
.relative(paths.appSrc, info.absoluteResourcePath)
.replace(/\\/g, '/')
: isEnvDevelopment &&
(info => path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')),
},
cache: {
type: 'filesystem',
version: createEnvironmentHash(env.raw),
cacheDirectory: paths.appWebpackCache,
store: 'pack',
buildDependencies: {
defaultWebpack: ['webpack/lib/'],
config: [__filename],
tsconfig: [paths.appTsConfig, paths.appJsConfig].filter(f =>
fs.existsSync(f)
),
},
},
infrastructureLogging: {
level: 'none',
},
optimization: {
minimize: isEnvProduction,
minimizer: [
// This is only used in production mode
new TerserPlugin({
terserOptions: {
parse: {
// We want terser to parse ecma 8 code. However, we don't want it
// to apply any minification steps that turns valid ecma 5 code
// into invalid ecma 5 code. This is why the 'compress' and 'output'
// sections only apply transformations that are ecma 5 safe
// https://github.com/facebook/create-react-app/pull/4234
ecma: 8,
},
compress: {
ecma: 5,
warnings: false,
// Disabled because of an issue with Uglify breaking seemingly valid code:
// https://github.com/facebook/create-react-app/issues/2376
// Pending further investigation:
// https://github.com/mishoo/UglifyJS2/issues/2011
comparisons: false,
// Disabled because of an issue with Terser breaking valid code:
// https://github.com/facebook/create-react-app/issues/5250
// Pending further investigation:
// https://github.com/terser-js/terser/issues/120
inline: 2,
},
mangle: {
safari10: true,
},
// Added for profiling in devtools
keep_classnames: isEnvProductionProfile,
keep_fnames: isEnvProductionProfile,
output: {
ecma: 5,
comments: false,
// Turned on because emoji and regex is not minified properly using default
// https://github.com/facebook/create-react-app/issues/2488
ascii_only: true,
},
},
}),
// This is only used in production mode
new CssMinimizerPlugin(),
],
},
resolve: {
// This allows you to set a fallback for where webpack should look for modules.
// We placed these paths second because we want `node_modules` to "win"
// if there are any conflicts. This matches Node resolution mechanism.
// https://github.com/facebook/create-react-app/issues/253
modules: ['node_modules', paths.appNodeModules].concat(
modules.additionalModulePaths || []
),
// These are the reasonable defaults supported by the Node ecosystem.
// We also include JSX as a common component filename extension to support
// some tools, although we do not recommend using it, see:
// https://github.com/facebook/create-react-app/issues/290
// `web` extension prefixes have been added for better support
// for React Native Web.
extensions: paths.moduleFileExtensions
.map(ext => `.${ext}`)
.filter(ext => useTypeScript || !ext.includes('ts')),
alias: {
// Support React Native Web
// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
'react-native': 'react-native-web',
// Allows for better profiling with ReactDevTools
...(isEnvProductionProfile && {
'react-dom$': 'react-dom/profiling',
'scheduler/tracing': 'scheduler/tracing-profiling',
}),
"@": paths.appSrc,
...(modules.webpackAliases || {}),
},
plugins: [
// Prevents users from importing files from outside of src/ (or node_modules/).
// This often causes confusion because we only process files within src/ with babel.
// To fix this, we prevent you from importing files out of src/ -- if you'd like to,
// please link the files into your node_modules/ and let module-resolution kick in.
// Make sure your source files are compiled, as they will not be processed in any way.
new ModuleScopePlugin(paths.appSrc, [
paths.appPackageJson,
reactRefreshRuntimeEntry,
reactRefreshWebpackPluginRuntimeEntry,
babelRuntimeEntry,
babelRuntimeEntryHelpers,
babelRuntimeRegenerator,
]),
],
},
module: {
strictExportPresence: true,
rules: [
// Handle node_modules packages that contain sourcemaps
shouldUseSourceMap && {
enforce: 'pre',
exclude: /@babel(?:\/|\\{1,2})runtime/,
test: /\.(js|mjs|jsx|ts|tsx|css)$/,
loader: require.resolve('source-map-loader'),
},
{
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// TODO: Merge this config once `image/avif` is in the mime-db
// https://github.com/jshttp/mime-db
{
test: [/\.avif$/],
type: 'asset',
mimetype: 'image/avif',
parser: {
dataUrlCondition: {
maxSize: imageInlineSizeLimit,
},
},
},
// "url" loader works like "file" loader except that it embeds assets
// smaller than specified limit in bytes as data URLs to avoid requests.
// A missing `test` is equivalent to a match.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
type: 'asset',
parser: {
dataUrlCondition: {
maxSize: imageInlineSizeLimit,
},
},
},
{
test: /\.svg$/,
use: [
{
loader: require.resolve('@svgr/webpack'),
options: {
prettier: false,
svgo: false,
svgoConfig: {
plugins: [{ removeViewBox: false }],
},
titleProp: true,
ref: true,
},
},
{
loader: require.resolve('file-loader'),
options: {
name: 'static/media/[name].[hash].[ext]',
},
},
],
issuer: {
and: [/\.(ts|tsx|js|jsx|md|mdx)$/],
},
},
// Process application JS with Babel.
// The preset includes JSX, Flow, TypeScript, and some ESnext features.
{
test: /\.(js|mjs|jsx|ts|tsx)$/,
include: paths.appSrc,
loader: require.resolve('babel-loader'),
options: {
customize: require.resolve(
'babel-preset-react-app/webpack-overrides'
),
presets: [
[
require.resolve('babel-preset-react-app'),
{
runtime: hasJsxRuntime ? 'automatic' : 'classic',
},
],
],
plugins: [
isEnvDevelopment &&
shouldUseReactRefresh &&
require.resolve('react-refresh/babel'),
[
"import",
{
"libraryName": "react-vant",
"libraryDirectory": "es",
"style": true
}
]
].filter(Boolean),
// This is a feature of `babel-loader` for webpack (not Babel itself).
// It enables caching results in ./node_modules/.cache/babel-loader/
// directory for faster rebuilds.
cacheDirectory: true,
// See #6846 for context on why cacheCompression is disabled
cacheCompression: false,
compact: isEnvProduction,
},
},
// Process any JS outside of the app with Babel.
// Unlike the application JS, we only compile the standard ES features.
{
test: /\.(js|mjs)$/,
exclude: /@babel(?:\/|\\{1,2})runtime/,
loader: require.resolve('babel-loader'),
options: {
babelrc: false,
configFile: false,
compact: false,
presets: [
[
require.resolve('babel-preset-react-app/dependencies'),
{ helpers: true },
],
],
cacheDirectory: true,
// See #6846 for context on why cacheCompression is disabled
cacheCompression: false,
// Babel sourcemaps are needed for debugging into node_modules
// code. Without the options below, debuggers like VSCode
// show incorrect code and set breakpoints on the wrong lines.
sourceMaps: shouldUseSourceMap,
inputSourceMap: shouldUseSourceMap
},
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use MiniCSSExtractPlugin to extract that CSS
// to a file, but in development "style" loader enables hot editing
// of CSS.
// By default we support CSS Modules with the extension .module.css
{
test: cssRegex,
exclude: cssModuleRegex,
use: getStyleLoaders({
importLoaders: 1,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
modules: {
mode: 'icss',
},
}),
// Don't consider CSS imports dead code even if the
// containing package claims to have no side effects.
// Remove this when webpack adds a warning or an error for this.
// See https://github.com/webpack/webpack/issues/6571
sideEffects: true,
},
// Adds support for CSS Modules (https://github.com/css-modules/css-modules)
// using the extension .module.css
{
test: cssModuleRegex,
use: getStyleLoaders({
importLoaders: 1,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
modules: {
mode: 'local',
getLocalIdent: getCSSModuleLocalIdent,
},
}),
},
// Opt-in support for SASS (using .scss or .sass extensions).
// By default we support SASS Modules with the
// extensions .module.scss or .module.sass
{
test: sassRegex,
exclude: sassModuleRegex,
use: getStyleLoaders(
{
importLoaders: 3,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
modules: {
mode: 'icss',
},
},
'sass-loader'
),
// Don't consider CSS imports dead code even if the
// containing package claims to have no side effects.
// Remove this when webpack adds a warning or an error for this.
// See https://github.com/webpack/webpack/issues/6571
sideEffects: true,
},
// Adds support for CSS Modules, but using SASS
// using the extension .module.scss or .module.sass
{
test: sassModuleRegex,
use: getStyleLoaders(
{
importLoaders: 3,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
modules: {
mode: 'local',
getLocalIdent: getCSSModuleLocalIdent,
},
},
'sass-loader'
),
},
//less 配置
{
test: lessRegex,
exclude: lessModuleRegex,
use: getStyleLoaders(
{
importLoaders: 2,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
},
"less-loader"
),
sideEffects: true,
},
//less 模块化配置
{
test: lessModuleRegex,
use: getStyleLoaders(
{
importLoaders: 2,
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
modules: {
getLocalIdent: getCSSModuleLocalIdent,
},
},
"less-loader"
),
},
// "file" loader makes sure those assets get served by WebpackDevServer.
// When you `import` an asset, you get its (virtual) filename.
// In production, they would get copied to the `build` folder.
// This loader doesn't use a "test" so it will catch all modules
// that fall through the other loaders.
{
// Exclude `js` files to keep "css" loader working as it injects
// its runtime that would otherwise be processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/^$/, /\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
type: 'asset/resource',
},
// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
],
},
].filter(Boolean),
},
plugins: [
// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin(
Object.assign(
{},
{
inject: true,
template: paths.appHtml,
},
isEnvProduction
? {
minify: {
removeComments: true,
collapseWhitespace: true,
removeRedundantAttributes: true,
useShortDoctype: true,
removeEmptyAttributes: true,
removeStyleLinkTypeAttributes: true,
keepClosingSlash: true,
minifyJS: true,
minifyCSS: true,
minifyURLs: true,
},
}
: undefined
)
),
// Inlines the webpack runtime script. This script is too small to warrant
// a network request.
// https://github.com/facebook/create-react-app/issues/5358
isEnvProduction &&
shouldInlineRuntimeChunk &&
new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime-.+[.]js/]),
// Makes some environment variables available in index.html.
// The public URL is available as %PUBLIC_URL% in index.html, e.g.:
// <link rel="icon" href="%PUBLIC_URL%/favicon.ico">
// It will be an empty string unless you specify "homepage"
// in `package.json`, in which case it will be the pathname of that URL.
new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
// This gives some necessary context to module not found errors, such as
// the requesting resource.
new ModuleNotFoundPlugin(paths.appPath),
// Makes some environment variables available to the JS code, for example:
// if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
// It is absolutely essential that NODE_ENV is set to production
// during a production build.
// Otherwise React will be compiled in the very slow development mode.
new webpack.DefinePlugin(env.stringified),
// Experimental hot reloading for React .
// https://github.com/facebook/react/tree/main/packages/react-refresh
isEnvDevelopment &&
shouldUseReactRefresh &&
new ReactRefreshWebpackPlugin({
overlay: false,
}),
// Watcher doesn't work well if you mistype casing in a path so we use
// a plugin that prints an error when you attempt to do this.
// See https://github.com/facebook/create-react-app/issues/240
isEnvDevelopment && new CaseSensitivePathsPlugin(),
isEnvProduction &&
new MiniCssExtractPlugin({
// Options similar to the same options in webpackOptions.output
// both options are optional
filename: 'static/css/[name].[contenthash:8].css',
chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
}),
// Generate an asset manifest file with the following content:
// - "files" key: Mapping of all asset filenames to their corresponding
// output file so that tools can pick it up without having to parse
// `index.html`
// - "entrypoints" key: Array of files which are included in `index.html`,
// can be used to reconstruct the HTML if necessary
new WebpackManifestPlugin({
fileName: 'asset-manifest.json',
publicPath: paths.publicUrlOrPath,
generate: (seed, files, entrypoints) => {
const manifestFiles = files.reduce((manifest, file) => {
manifest[file.name] = file.path;
return manifest;
}, seed);
const entrypointFiles = entrypoints.main.filter(
fileName => !fileName.endsWith('.map')
);
return {
files: manifestFiles,
entrypoints: entrypointFiles,
};
},
}),
// Moment.js is an extremely popular library that bundles large locale files
// by default due to how webpack interprets its code. This is a practical
// solution that requires the user to opt into importing specific locales.
// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
// You can remove this if you don't use Moment.js:
new webpack.IgnorePlugin({
resourceRegExp: /^\.\/locale$/,
contextRegExp: /moment$/,
}),
// Generate a service worker script that will precache, and keep up to date,
// the HTML & assets that are part of the webpack build.
isEnvProduction &&
fs.existsSync(swSrc) &&
new WorkboxWebpackPlugin.InjectManifest({
swSrc,
dontCacheBustURLsMatching: /\.[0-9a-f]{8}\./,
exclude: [/\.map$/, /asset-manifest\.json$/, /LICENSE/],
// Bump up the default maximum size (2mb) that's precached,
// to make lazy-loading failure scenarios less likely.
// See https://github.com/cra-template/pwa/issues/13#issuecomment-722667270
maximumFileSizeToCacheInBytes: 5 * 1024 * 1024,
}),
// TypeScript type checking
useTypeScript &&
new ForkTsCheckerWebpackPlugin({
async: isEnvDevelopment,
typescript: {
typescriptPath: resolve.sync('typescript', {
basedir: paths.appNodeModules,
}),
configOverwrite: {
compilerOptions: {
sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,
skipLibCheck: true,
inlineSourceMap: false,
declarationMap: false,
noEmit: true,
incremental: true,
tsBuildInfoFile: paths.appTsBuildInfoFile,
},
},
context: paths.appPath,
diagnosticOptions: {
syntactic: true,
},
mode: 'write-references',
// profile: true,
},
issue: {
// This one is specifically to match during CI tests,
// as micromatch doesn't match
// '../cra-template-typescript/template/src/App.tsx'
// otherwise.
include: [
{ file: '../**/src/**/*.{ts,tsx}' },
{ file: '**/src/**/*.{ts,tsx}' },
],
exclude: [
{ file: '**/src/**/__tests__/**' },
{ file: '**/src/**/?(*.){spec|test}.*' },
{ file: '**/src/setupProxy.*' },
{ file: '**/src/setupTests.*' },
],
},
logger: {
infrastructure: 'silent',
},
}),
!disableESLintPlugin &&
new ESLintPlugin({
// Plugin options
extensions: ['js', 'mjs', 'jsx', 'ts', 'tsx'],
formatter: require.resolve('react-dev-utils/eslintFormatter'),
eslintPath: require.resolve('eslint'),
failOnError: !(isEnvDevelopment && emitErrorsAsWarnings),
context: paths.appSrc,
cache: true,
cacheLocation: path.resolve(
paths.appNodeModules,
'.cache/.eslintcache'
),
// ESLint class options
cwd: paths.appPath,
resolvePluginsRelativeTo: __dirname,
baseConfig: {
extends: [require.resolve('eslint-config-react-app/base')],
rules: {
...(!hasJsxRuntime && {
'react/react-in-jsx-scope': 'error',
}),
},
},
}),
].filter(Boolean),
// Turn off performance processing because we utilize
// our own hints via the FileSizeReporter
performance: false,
};
};
总结:
其实,我觉得暴露 eject配置起来还挺方便的。目前来看不暴露的话,会遇到不少问题。主要是第三方插件,没适配v5。
如果不想暴露 eject 可以参考 :
react create-react-app v5 从零搭建项目 不暴露 eject文章来源地址https://www.toymoban.com/news/detail-730137.html
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