Question

希望使用以下buildpack在Heroku上部署create-react-app配置：https://github.com/mars/create-react-app-buildpack

我注意到在gzip压缩后我的构建大小 425 kb ，我的网站在初始加载时非常慢

以下步骤是否足以减少捆绑尺寸？（即降压预制的最佳效果）。如果没有，你会推荐什么呢？ - 我还没有这样做：

代码拆分我尽可能使用React Loadable（也许可以使用 react-universal-component）
确保我只加载所需的模块（例如import { map } from 'lodash/map';）。

我不愿意做的其他解决方案

使用Preact因为我不想破坏事情：）
Two Quick Ways To Reduce React App’s Size In Production - 看起来这需要弹出，我很好奇它是否物有所值？

即添加以下内容：

new webpack.optimize.DedupePlugin(), //dedupe similar code new webpack.optimize.UglifyJsPlugin(), //minify everything new webpack.optimize.AggressiveMergingPlugin()//Merge chunks

Build time Gzip - 我认为create-react-app

我的源地图浏览器 - 再次尝试取消Firebase，删除Lottie，并仅导入必要的模块

Heroku Build Logs

-----> React.js (create-react-app) multi app detected
-----> Configure create-react-app build environment
       Using `NODE_ENV=development`
=====> Downloading Buildpack: https://github.com/heroku/heroku-buildpack-multi.git
=====> Detected Framework: Multipack
=====> Downloading Buildpack: https://github.com/heroku/heroku-buildpack-nodejs.git
=====> Detected Framework: Node.js
-----> Creating runtime environment

       NPM_CONFIG_LOGLEVEL=error
       NPM_CONFIG_PRODUCTION=false
       NODE_VERBOSE=false
       NODE_ENV=production
       NODE_MODULES_CACHE=true
-----> Installing binaries
       engines.node (package.json):  unspecified
       engines.npm (package.json):   unspecified (use default)

       Resolving node version 8.x...
       Downloading and installing node 8.11.1...
       Using default npm version: 5.6.0
-----> Restoring cache
       Loading 2 from cacheDirectories (default):
       - node_modules
       - bower_components (not cached - skipping)
-----> Building dependencies
       Installing node modules (package.json + package-lock)
       up to date in 14.708s
-----> Caching build
       Clearing previous node cache
       Saving 2 cacheDirectories (default):
       - node_modules
       - bower_components (nothing to cache)
-----> Pruning devDependencies
       Skipping because NPM_CONFIG_PRODUCTION is 'false'
-----> Build succeeded!
=====> Downloading Buildpack: https://github.com/mars/create-react-app-inner-buildpack.git
=====> Detected Framework: React.js (create-react-app)
       Using existing `static.json`
       Enabling runtime environment variables
-----> Build succeeded!
=====> Downloading Buildpack: https://github.com/mars/create-react-app-inner-buildpack.git
=====> Detected Framework: React.js (create-react-app)
       Using existing `static.json`
       Enabling runtime environment variables
> journey-client@0.1.0 build /tmp/build_127125dc8ce0d7d71d8f78fe226cf544
> npm run build-css && react-scripts build
> journey-client@0.1.0 build-css /tmp/build_127125dc8ce0d7d71d8f78fe226cf544
> node-sass-chokidar src/ -o src/
Wrote 2 CSS files to /tmp/build_127125dc8ce0d7d71d8f78fe226cf544/src/
Creating an optimized production build...
File sizes after gzip:
  495.27 KB  build/static/js/main.b1129bd4.js
  18.05 KB   build/static/css/main.e2b6d04c.css
The project was built assuming it is hosted at the server root.
To override this, specify the homepage in your package.json.
For example, add this to build it for GitHub Pages:
  "homepage" : "http://myname.github.io/myapp",
The build folder is ready to be deployed.
You may serve it with a static server:
  npm install -g serve
  serve -s build
=====> Downloading Buildpack: https://github.com/heroku/heroku-buildpack-static.git
=====> Detected Framework: Static HTML
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
-----> Installed directory to /app/bin
Using release configuration from last framework (Static HTML).
-----> Discovering process types
       Procfile declares types     -> (none)
       Default types for buildpack -> web
-----> Compressing...
       Done: 92.5M
-----> Launching...
       Released v94

Answer 1

仅使用需要使用的软件包。如果您有相当大的包装，请仅包括所需的模块：

导入'firebase / auth'; 导入“ firebase / firestore”；从'lodash.isequal'导入isEqual;
使用类似Gatsby.js的方法为您处理代码拆分！
将code splitting与next.js，react-loadable或其他方法结合使用。
使用服务器端渲染解决方案

Answer 2

我最近遇到了同样的问题，我不想退出旧的CRA项目。我做了以下步骤： 1.将您的React ad React-DOM更新到最新版本（在我的情况下为16.8.6）-运行“ yarn react @ next react-dom @ next”（如果使用npm，则运行npm命令） 2.使用React.lazy和React.Suspense方法来按需延迟加载您的库和/或组件，这里是链接https://reactjs.org/blog/2018/10/23/react-v-16-6.html

就是这样，但是如果您使用'import'语法遇到错误，则需要使用babel-plugin-syntax-dynamic-import插件。

您将获得最新的react版本并希望减少捆绑包的大小-希望这对您有所帮助

Answer 3

这是大型项目的create-react-app问题。我建议您手动设置react项目，并且确实需要针对开发和生产环境进行配置更改。有大量资源可以帮助配置Web Pack，从而有助于减小项目的包大小。这是其中之一的示例。

Two Quick Ways To Reduce React App’s Size In Production

大型Create-React-App捆绑包大小 - 优化生产构建

3 个答案: