天氣越來越熱,公司的業務也慢慢放緩,這時候就有空暇時間爲自己充點電了,然後就把目標放在了react上,公司的前端技術框架用的是vue。對react早就如雷貫耳,然後自己看了文檔就劈里啪啦開始搞。在用create-react-app腳手架搭建項目的時候遇到一些配置上的小坑,所以在這裏筆記一下。
配置sass
從react-scripts 2.0.0開始就支持直接配置sass了,安裝個node-sass依賴即可
npm install node-sass --save-dev
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這時問題來了,公共sass文件怎麼管理呢?不可能每個頁面都去引入一次吧,這時候想到了webpack來配置,不過create-react-app在不彈出eject時是沒有webpack.config.js文件的。在antd按需加載的文檔裏面發現了一個craco的庫可以解決這個問題,同時也可以很簡單進行其他配置:
npm install @craco/craco --save
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依賴下載完成後,修改package.json裏面的scripts:
// package.json
"scripts": {
"start": "craco start",
"build": "craco build",
"test": "craco test",
"eject": "react-scripts eject"
}
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在項目根目錄新建一個craco.config.js的文件,你可以進行如下的配置(此處直接貼了一版@craco官方可配置項):
const { when, whenDev, whenProd, whenCI, whenTest, ESLINT_MODES, POSTCSS_MODES } = require("@craco/craco");
module.exports = {
reactScriptsVersion: "react-scripts" /* (default value) */,
style: {
modules: {
localIdentName: ""
},
css: {
loaderOptions: { /* Any css-loader configuration options: https://github.com/webpack-contrib/css-loader. */ },
loaderOptions: (cssLoaderOptions, { env, paths }) => { return cssLoaderOptions; }
},
sass: {
loaderOptions: { /* Any sass-loader configuration options: https://github.com/webpack-contrib/sass-loader. */ },
loaderOptions: (sassLoaderOptions, { env, paths }) => { return sassLoaderOptions; }
},
postcss: {
mode: "extends" /* (default value) */ || "file",
plugins: [],
env: {
autoprefixer: { /* Any autoprefixer options: https://github.com/postcss/autoprefixer#options */ },
stage: 3, /* Any valid stages: https://cssdb.org/#staging-process. */
features: { /* Any CSS features: https://preset-env.cssdb.org/features. */ }
},
loaderOptions: { /* Any postcss-loader configuration options: https://github.com/postcss/postcss-loader. */ },
loaderOptions: (postcssLoaderOptions, { env, paths }) => { return postcssLoaderOptions; }
}
},
eslint: {
enable: true /* (default value) */,
mode: "extends" /* (default value) */ || "file",
configure: { /* Any eslint configuration options: https://eslint.org/docs/user-guide/configuring */ },
configure: (eslintConfig, { env, paths }) => { return eslintConfig; },
loaderOptions: { /* Any eslint-loader configuration options: https://github.com/webpack-contrib/eslint-loader. */ },
loaderOptions: (eslintOptions, { env, paths }) => { return eslintOptions; }
},
babel: {
presets: [],
plugins: [],
loaderOptions: { /* Any babel-loader configuration options: https://github.com/babel/babel-loader. */ },
loaderOptions: (babelLoaderOptions, { env, paths }) => { return babelLoaderOptions; }
},
typescript: {
enableTypeChecking: true /* (default value) */
},
webpack: {
alias: {},
plugins: [],
configure: { /* Any webpack configuration options: https://webpack.js.org/configuration */ },
configure: (webpackConfig, { env, paths }) => { return webpackConfig; }
},
jest: {
babel: {
addPresets: true, /* (default value) */
addPlugins: true /* (default value) */
},
configure: { /* Any Jest configuration options: https://jestjs.io/docs/en/configuration. */ },
configure: (jestConfig, { env, paths, resolve, rootDir }) => { return jestConfig; }
},
devServer: { /* Any devServer configuration options: https://webpack.js.org/configuration/dev-server/#devserver. */ },
devServer: (devServerConfig, { env, paths, proxy, allowedHost }) => { return devServerConfig; },
plugins: [
{
plugin: {
overrideCracoConfig: ({ cracoConfig, pluginOptions, context: { env, paths } }) => { return cracoConfig; },
overrideWebpackConfig: ({ webpackConfig, cracoConfig, pluginOptions, context: { env, paths } }) => { return webpackConfig; },
overrideDevServerConfig: ({ devServerConfig, cracoConfig, pluginOptions, context: { env, paths, proxy, allowedHost } }) => { return devServerConfig; },
overrideJestConfig: ({ jestConfig, cracoConfig, pluginOptions, context: { env, paths, resolve, rootDir } }) => { return jestConfig };
},
options: {}
}
]
};
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根據上面的配置項開始配置全局sass文件:
module.exports = {
// ...
style: {
sass: {
loaderOptions: {
data: `@import "~@/assets/css/variable.scss";@import "~@/assets/css/base.scss";`
}
}
}
}
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以上就將全局sass配置好了。但緊接着問題又來了,想要爲項目引入UI框架怎麼引入?譬如antd。antd官方已經給出了按需加載的現成方法,按照官網步驟即可引入成功,但這裏我們已經引入了@craco庫,又該如何按需加載呢?craco-antd可以結合@craco來解決這個問題:
npm install -save craco-antd
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下載完成後在craco.config.js中引入:
const CracoAntDesignPlugin = require("craco-antd")
module.exports = {
// ...
plugins: [{ plugin: CracoAntDesignPlugin }]
}
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以上完成了對antd的按需引入。你還可以進行本地跨域、別名等常用配置:
devServer、alias配置
const CracoAntDesignPlugin = require("craco-antd")
module.exports = {
// ...
webpack: {
// 別名
alias: {
'@': path.resolve('src')
}
},
devServer: {
port: 9999, // 端口配置
proxy: {
'/api': {
target: 'http://xxx.com',
ws: false, // websocket
changeOrigin: true, //是否跨域
secure: false, // 如果是https接口,需要配置這個參數
pathRewrite: {
'^/api': ''
}
}
}
}
}
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結語
以上是在學習react時遇到的一些配置問題。若有寫得不對的地方,請多多指教。