Ever wondered how to build a custom webpack config for Angular? I did and I jsut stumbled upon this file in the repository https://github.com/manfredsteyer/ngx-build-plus which aims to help building multiple standalone Angular Elements.
I quickly spotted this part in the angular.json
which will replace the default browser build.
"architect": {
"build": {
"builder": "ngx-build-plus:build",
}