Angular CLI Webpack (ngw)

This package provides an opportunity to modify @angular/cli project’s webpack configuration without “ejecting”.

Installation

For angular 6/7:

$ npx -p @angular/cli ng new my-project && cd my-project # create new Angular CLI project
$ npm i -D ngw # installing an improved cli-eject
$ ./node_modules/.bin/ngw --set-up # run via terminal in project root
Set up went successfully!

For angular 5 use npm i -D ngw@angular5

Usage:

Last command installation (ngw —set-up) makes three things:
1) Changes scripts in package.json that starts from ng to ngw
2) Creates file ngw.config.ts in project root where you can redefine webpack.Configuration used by @angular/cli
3) Sets compilerOptions.module = "commonjs" property in tsconfig.json

So just make changes to the webpack config in appeared ngw.config.ts

You may like to do npm i -D @types/webpack for better experience.

Example

Removes unused selectors from your CSS

This little piece of code in your ngw.config removes unused selectors from your CSS:

const PurifyCSSPlugin = require('purifycss-webpack');
const path = require('path');
const glob = require('glob');
export default function(config) {
    config.plugins.push(
      new PurifyCSSPlugin({
        paths: glob.sync(path.join(__dirname, '**/*.html'))
      })
    );
    return config;
}

Debugging

You may like to debug your configuration.
This can be done with ndb package.
1) Make sure that your development environment meets the requirements of ndb
2) npm i -g ndb
3) Add debugger keyword in ngw.config.ts
4) ndb npm run start

Prod and dev mode modifications (ngw.config.ts)

const isProduction = process.argv.indexOf('--prod') !== -1;
export default function(config, options) {
  //common config modification
  ...
  config = isProduction
    ? productionModificationsMerged(config)
    : devModificationsMerged(config);
  }
  ...
}