What is the difference between Shared Module and Core Module in Angular?

Quick Answer SharedModule contains components, directives, and pipes used across multiple feature modules. Export what you share, don't provide services (use root or feature-level providers). CoreModule contains app-wide singleton services (auth, logging) and is imported only in AppModule. Import SharedModule in feature modules. CoreModule should throw error if imported twice (to enforce singleton).

Answer

Shared Module contains reusable components, pipes, and directives and can be imported many times.

Core Module holds global singletons like services, interceptors, and layout components, imported only once.

This separation improves architecture, scalability, and avoids duplicate service instances.

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What is the difference between Shared Module and Core Module in Angular?

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