app使用less与antd按需加载

使用antd按需加载

使用react-app-rewired对 create-react-app 的默认配置进行自定义

1、yarn add react-app-rewired --dev

/* package.json */ "scripts": { - "start": "react-scripts start", + "start": "react-app-rewired start", - "build": "react-scripts build", + "build": "react-app-rewired build", - "test": "react-scripts test --env=jsdom", + "test": "react-app-rewired test --env=jsdom", }

2.然后在项目根目录创建一个 config-overrides.js 用于修改默认配置。

module.exports = function override(config, env) { // do stuff with the webpack config... return config; };

使用 babel-plugin-import

babel-plugin-import 是一个用于按需加载组件代码和样式babel 插件（），现在我们尝试安装它并修改config-overrides.js 文件

1.yarn add babel-plugin-import --dev

+ const { injectBabelPlugin } = require('react-app-rewired'); module.exports = function override(config, env) { + config = injectBabelPlugin(['import', { libraryName: 'antd', libraryDirectory: 'es', style: 'css' }], config); return config; };

或者也可修改

{ test: /\.(js|jsx|mjs)$/, include: paths.appSrc, loader: require.resolve('babel-loader'), options: { plugins: [ ['import', { libraryName: 'antd', style: true }], ], // 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, }, },

自定义主题

yarn add react-app-rewire-less --dev

const { injectBabelPlugin } = require('react-app-rewired'); + const rewireLess = require('react-app-rewire-less'); module.exports = function override(config, env) { - config = injectBabelPlugin(['import', { libraryName: 'antd', style: 'css' }], config); + config = injectBabelPlugin(['import', { libraryName: 'antd', style: true }], config); + config = rewireLess.withLoaderOptions({ + modifyVars: { "@primary-color": "#1DA57A" }, + })(config, env); return config; };

参考链接：https://ant.design/docs/react/use-with-create-react-app-cn

使用less

如果已经配置react-app-rewire-less，则无需再进行此操作

1.npm install less-loader less --save-dev
2.修改node_modules/react_script/config下的webpack.config.dev.js 和 webpack.config-prod.js 配置文件

test: /.css$/ 改为 /.(css|less)$/

test: /.css$/ 的 use 数组配置增加 less-loader

{ test: /\.(css|less)$/, use: [ require.resolve('style-loader'), { loader: require.resolve('css-loader'), options: { importLoaders: 1, }, }, { loader: require.resolve('postcss-loader'), options: { // Necessary for external CSS imports to work // https://github.com/facebookincubator/create-react-app/issues/2677 ident: 'postcss', plugins: () => [ require('postcss-flexbugs-fixes'), autoprefixer({ browsers: [ '>1%', 'last 4 versions', 'Firefox ESR', 'not ie < 9', // React doesn't support IE8 anyway ], flexbox: 'no-2009', }), ], }, }, { loader: require.resolve('less-loader') // compiles Less to CSS } ], },

使用css Module

antd 和 css modules 不能混用,针对antd的css 单独写一条loader的规则,不开启 css modules。

使用 exclude 和 include 配置,修改webpack.config.dev.js 和 webpack.config-prod.js 配置文件 (尽量不要使用less-loader 来处理css文件，在与antd一起使用时可能出现错误，单独写一条规则)

{ test: /\.css$/, exclude: /node_modules|antd\.css/, use: [ require.resolve('style-loader'), { loader: require.resolve('css-loader'), options: { importLoaders: 1, modules: true, // 新增对css modules的支持 localIdentName: '[name]__[local]__[hash:base64:5]', }, }, { loader: require.resolve('postcss-loader'), options: { // Necessary for external CSS imports to work // https://github.com/facebookincubator/create-react-app/issues/2677 ident: 'postcss', plugins: () => [ require('postcss-flexbugs-fixes'), autoprefixer({ browsers: [ '>1%', 'last 4 versions', 'Firefox ESR', 'not ie < 9', // React doesn't support IE8 anyway ], flexbox: 'no-2009', }), ], }, }, ], }, { test: /\.less$/, exclude: /node_modules|antd\.less/, use: [ require.resolve('style-loader'), { loader: require.resolve('css-loader'), options: { importLoaders: 1, modules: true, // 新增对css modules的支持 localIdentName: '[name]__[local]__[hash:base64:5]', }, }, { loader: require.resolve('postcss-loader'), options: { // Necessary for external CSS imports to work // https://github.com/facebookincubator/create-react-app/issues/2677 ident: 'postcss', plugins: () => [ require('postcss-flexbugs-fixes'), autoprefixer({ browsers: [ '>1%', 'last 4 versions', 'Firefox ESR', 'not ie < 9', // React doesn't support IE8 anyway ], flexbox: 'no-2009', }), ], }, }, { loader: require.resolve('less-loader') // compiles Less to CSS }, ], }, { test: /\.(css)$/, include: /node_modules|antd\.css/, use: [ require.resolve('style-loader'), { loader: require.resolve('css-loader'), options: { importLoaders: 1, }, }, { loader: require.resolve('postcss-loader'), options: { // Necessary for external CSS imports to work // https://github.com/facebookincubator/create-react-app/issues/2677 ident: 'postcss', plugins: () => [ require('postcss-flexbugs-fixes'), autoprefixer({ browsers: [ '>1%', 'last 4 versions', 'Firefox ESR', 'not ie < 9', // React doesn't support IE8 anyway ], flexbox: 'no-2009', }), ], }, }, ], }, { test: /\.(less)$/, include: /node_modules|antd\.less/, use: [ require.resolve('style-loader'), { loader: require.resolve('css-loader'), options: { importLoaders: 1, }, }, { loader: require.resolve('postcss-loader'), options: { // Necessary for external CSS imports to work // https://github.com/facebookincubator/create-react-app/issues/2677 ident: 'postcss', plugins: () => [ require('postcss-flexbugs-fixes'), autoprefixer({ browsers: [ '>1%', 'last 4 versions', 'Firefox ESR', 'not ie < 9', // React doesn't support IE8 anyway ], flexbox: 'no-2009', }), ], }, }, { loader: require.resolve('less-loader') // compiles Less to CSS }, ], },