Why barrel files? about angular-ngrx-material-starter HOT 4 CLOSED

Can you please provide link to that statement? I only could find this.

As for circular dependencies, their presence can be a valuable signal that the service / something which is affected should be moved up in the hierarchy or refactored so I don't see this as a bad thing.

Also I guess circular dependencies happen more because of the way the functionality is structured and not because of the use of barrel itself but my experience whit that is limited.

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@tomastrajan search for barrel in Angular Changelog

There is also a related discussion here

I am personally too new to this front-end stuff to have a preference one way or another :) I just remember taking out barrels from a project during the NG2 > NG4 transition because they were no longer "recommended". That's all.

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I have checked the discussion and think that the last comment summarizes it quite nicely...

@michaeljota We all like barrels. What has changed is that they are now considered a matter of personal style, not Angular style.

There was a time when we thought they would be almost essential for aggregating access to components. After modules were introduced, that purpose melted away. They still have utility for aggregating model and service classes; I'm sure they are useful elsewhere too.

SystemJS is not a factor in this decision. Barrels and SystemJS get along fine.

Keep using barrels as you find them helpful. We have decided not to restore barrels to the Style Guide. This issue is closed.

(emphasis is mine)

Barrels can still be useful for simplification of import / export of a module with a lot of stuff (eg: services) which will be imported by other services / components / modules. The CoreModule and it's index.ts file are then a great example of a barrel which exposes services which are needed by many other services through the application.

Hope that this helps!

Thank you for your interest and contribution!

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Can we use barrels only for interfaces, classes or enums instead of services, directives or components?

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