Importing/referencing NgbAnything inside LazyModule breaks tree shaking

[aitboudad]

🐞 Bug report

Command (mark with an x)

- [x] build

Is this a regression?

No

Description

Hi, I've noticed that some packages (ng-bootstrap) which provide fesm5 as a default package module doesn't take advantage of build optimizer, importing a submodule will include the whole library

🔬 Minimal Reproduction

see ng-bootstrap/ng-bootstrap#2883

[aitboudad]

this occurs only if the concerned module is declared in a lazy module, in that case using esm5 produce a better result.

[filipesilva]

I think I know what's going on. But I'll actually comment on ng-bootstrap/ng-bootstrap#2883 instead, as people have been looking into the issue there already.

[alan-agius4]

Closing as this is expected and is also documented in https://angular.io/guide/angular-package-format#entrypoints-and-code-splitting

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