How to share data between components in Angular: A shopping cart example

If you have developed modern web applications in Angular, you have inevitably run into a situation in which you need to share data among components (from parent to child, child to parent, child to grandparent, or *gasp* sibling to sibling).

In this article, originally posted on Medium, we’ll create a basic shopping cart application to explore best practices for sharing data and business logic between components using Services powered by RxJS Observables and BehaviorSubjects.

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