We have a JavaScript library and for building we use an Angular library project workspace. This JavaScript library is not consumed by an Angular application. Actually we need the output to be in UMD format. When I upgraded Angular to 13, I found that this output is not built anymore.

I tried to find a way to enable building the UMD bundle again but was not able to. I checked:

• https://angular.io/guide/angular-package-format#angular-package-format
• https://github.com/ng-packagr/ng-packagr

I understand that for Angular libraries in general it is a very good thing that UMD format is not built anymore but we would still need the UMD format.

Does anyone know how to achieve this? Many thanks in advance for any help. :)