使用 create-react-app 搭建编译打包项目

官方文档 https://www.html.cn/create-react-app/docs/getting-started/

其他教程 https://www.jianshu.com/p/77bf3944b0f4

直接执行

sudo npm install -g create-react-app
npm init react-app demo-02

执行上面的脚本，可能出现 A template was not provided. This is likely because you're using an outdated 这个错误，网上的意见是，卸载全局安装的 create-react-app 然后 which create-react-app 测试，确保卸载后（文件已经删除），然后执行 npx create-react-app my-app. 然后出现下面的正确安装的结果。

npm uninstall craete-react-app
which create-react-app
npx create-create-app demo-03

Success! Created demo-03 at /Users/Desktop/webpack-babel/demo-03
Inside that directory, you can run several commands:

  yarn start
    Starts the development server.

  yarn build
    Bundles the app into static files for production.

  yarn test
    Starts the test runner.

  yarn eject
    Removes this tool and copies build dependencies, configuration files and scripts into the app directory. If you do this, you can’t go back!

打开文件夹后，执行 npm start 或者 yarn start 均可开启服务

现在使用的是默认的开发工程脚本，下面是默认的readme

This project was bootstrapped with Create React App.

Available Scripts#

In the project directory, you can run:

yarn start#

Runs the app in the development mode. Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits. You will also see any lint errors in the console.

yarn test#

Launches the test runner in the interactive watch mode. See the section about running tests for more information.

yarn build#

Builds the app for production to the build folder. It correctly bundles React in production mode and optimizes the build for the best performance.

The build is minified and the filenames include the hashes. Your app is ready to be deployed!

See the section about deployment for more information.

yarn eject#

Note: this is a one-way operation. Once you eject, you can’t go back!

If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.

Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.

You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.

Learn More#

You can learn more in the Create React App documentation.

To learn React, check out the React documentation.

Code Splitting#

This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting

Analyzing the Bundle Size#

This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size

Making a Progressive Web App#

This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app

Advanced Configuration#

This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration

Deployment#

This section has moved here: https://facebook.github.io/create-react-app/docs/deployment

yarn build fails to minify#

This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify