Step 1 : Eject

npm run eject

This command used to moves create-react-app's  configuration files and dev/build/<<appname>> scripts into you <<app>> directory.

Note:

To run this command make sure following topics

• Add any untracked files you want to keep to your Git repository.
• Remove any untracked files you don't want to keep (either by deleting them or adding them to your .gitignore)
• Commit your changes, or stash them if you'd like to commit them at a later time
• create-react-app prevents you from ejecting your app without first having committed any outstanding changes to Git

Step 2: babel's remove-console

Install babel-plugin-transform-remove-console library and make following changes in package.json configuration file

npm install babel-plugin-transform-remove-console


"babel": {
 "presets": [
 "react-app"
 ],
 "plugins": [
 "transform-remove-console"
 ]
 }

Step 3: Build ReactJS

Run following command to build ReactJS application to deploy on production.  It will place all the files under a folder "build"

npm run build