What is the purpose of ng eject?

angular-cli is something magic, everything is done in a simple and automatic way.

But sometimes, you may want to act on how the package is done, add a plugin or you are simply curious to see the Webpack configuration on which it is based.

When running ng eject, you generate a webpack.config.json file. Looking at the file package.json you will see that the commands to launch have slightly changed:

ng serve --> npm start
ng build --> npm run build
ng e2e   --> npm run e2

If you want to undo ng eject, you will have to edit your .angular.cli.json file and set ejected to false:

"project": { 
  ...
  "ejected": false
}