In this article, we will be learning about circular dependencies in NestJS, why they arise, and how we can avoid them. NestJS code will not even compile if there is an unresolved circular dependency. One of the common problems encountered in this regard is circular dependencies. The NestJS architecture favors creating the logic layer as dependencies (i.e., services) that can be consumed by the access layers (i.e., controllers).Įven though NestJS has a built-in dependency injection system that takes care of resolving dependencies needed in different parts of our code, care must still be taken when working with dependencies. One of the beauties of NestJS is that it allows us to separate concerns within our applications. How to avoid circular dependencies in NestJS Samuel Olusola Follow Software engineer (JS stack, GoLang incoming…) and student of computer science at the University of Lagos.
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