ng2-bootstrap breaks lazy loading (angular-cli)

[slubowsky]

Have an angular-cli app that has lazy loading working. Add an alert to it as described in readme https://github.com/valor-software/ng2-bootstrap/blob/development/docs/getting-started/ng-cli.md. Lazy loading stops working. Only one bundle is created.

(To verify its not my app, I found another cli lazy loading app at angular/angular-cli#2865. Downloaded NotLazyLoading.zip from that issue, fixed the typo in app-routing.module.ts as described there, verified lazy loading works. Added ng2-bootstrap as above, now only 1 bundle created)

See also angular/angular-cli#2967

[slubowsky]

Looks like this is an angular-cli issue. See angular/angular-cli#2496 (comment) having import * as moment in your code or any imported library currently breaks lazy loading. ng2-bootstrap has this for datepicker module.
Workaround for all but date picker is to import individual modules only e.g. import { AlertModule } from 'ng2-bootstrap/components/alert'; instead of import { AlertModule } from 'ng2-bootstrap/ng2-bootstrap';