npm run-script build(production build) command, shows source code in browser in React JS

generate_sourcemap=false react-scripts build
npm build production
react webpack production build
npm run in production mode
obfuscate react code
webpack build script
webpack production build not working
npm run production

I am new to React JS development, and I created my React application using the npm create-react-app command. When I finished my development and built my application code, with an npm run script, this created a new build folder which I then deployed with my server.

The issue here is the following: after deployment if I open my website in Chrome and run developer tools I am able to see all my source code instead of minified code within Chrome, see image below:.

to avoid showing source code in browser inspector window, you have to disable the flag GENERATE_SOURCEMAP , to do so just update your package.json build script command as follows

scripts: {
  "build": "GENERATE_SOURCEMAP=false react-scripts build"
}

Ref: github -> https://github.com/facebook/create-react-app/issues/4162#issuecomment-373658997

after npm run build,source code in Chrome devtools were displayed , you may not generate it when build. package.json. scripts: { "build": "​GENERATE_SOURCEMAP=false react-scripts build" }. Also, the build command transpiles our source code into code which the browser can understand. It uses Babel for this and files are optimized for best performance. All of our JS files are bundled into a single minified file and even HTML/CSS code is minified to significantly reduce the download times on the client's browser. 1 npm start

React is a library to ease the development of your User Interface for your website. It is written in JavaScript and JavaScript runs on the client-side by default. i.e. within your browser. Code which is executed on the client-side can be viewed on your browser by default. This is true regardless of the client-side framework you choose whether it be React, Backbone, etc... If you don't want others to see your code within the browser I would consider developing your UI with with a server-side templating engine. With that being said, you can obfuscate your JavaScript if this is a big concern of yours so it's harder for others to see what you're doing. Here is a link to a JavaScript Obfuscation tool you can utilize.

Hopefully that helps!

Creating a Production Build, npm run-script build(production build) command, shows source code in browser in React JS - reactjs. Now, if I run npm run build I get a minified version of everything in the build folder. If I, however, run npm start the version NodeJS serves does not seem to have any modifications. But I cannot see these files. Question. So either: Can I access the files generated by npm start somewhere? As these seem to be unmodified.

you are using the devtool: 'source-map' in your webpack so please remove the devtool: 'source-map' from your file. you can take a reference from https://webpack.js.org/guides/production/

Deployment, npm run build` creates a `build` directory with a production build of your app. Inside the `build/static` directory will be your JavaScript and CSS files. vendor code tends to change less often than the actual application code, the browser will be able to cache them separately, Facebook Open Source Logo. Failed at the mvc-panel@0.1.0 build script 'react-scripts build'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the mvc-panel package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! react-scripts build npm ERR!

How To Set Up a React Project with Create React App, npm run build` creates a `build` directory with a production build of .js` are served with the contents of the `/static/js/main. .js` file. The last command shown above will serve your static site on the port Note: this feature is available with react-scripts@0.9.0 and higher. Facebook Open Source Logo. This is the plumbing command called by npm link and npm install. It should generally be called during installation, but if you need to run it directly, run: npm run-script build

How to NPM Start for React Tutorial Project, But now, Create React App includes all the JavaScript packages you What that means is you will run the Create React App code without first downloading the project. The script will also run npm install inside the project directory, which This command will kick off a build process that will download the  npm run build creates a build directory with a production build of your app. Inside the build/static directory will be your JavaScript and CSS files. Each filename inside of build/static will contain a unique hash of the file contents. This hash in the file name enables long term caching techniques.

How to set up & deploy your React app from scratch using Webpack , With NodeJS/NPM installed on your machine, you can just run the For example​, running npm build in the command line will actually run "react-scripts build" Also, once we minify or compress our code for production, our basic Also, the build command transpiles our source code into code which the  When you’re ready to deploy to production, running npm run build will create an optimized build of your app in the build folder. You can learn more about Create React App from its README and the User Guide. Next.js . Next.js is a popular and lightweight framework for static and server‑rendered applications built with React.

Comments
  • No you can see any JavaScript code: minified/unminified since it 's client-side code. It is up to you to minify the code yourself. Most people minify their JavaScript code prior to releasing to production to reduce the number of bytes needed to be downloaded by browser to run their web application. This is why when you inspect code a lot of the time it's minified code: (.min.js files)
  • Please consider accepting my answer if you found it helpful :)
  • I create my react application using cli command --- npm create-react-app, not with webpack