Reflection's role in modern software development is often underestimated, but the truth is it's a cornerstone of many useful features we use every day like dependency injection or object validation. It's implemented in many programming languages like C#, Java and finally, TypeScript. I would like to show you what can be achieved in TypeScript using the reflection mechanism - what features are available and what are the limitations we have to fight with. Also, I would like to give kudos to really interesting libraries extending the feature set of this mechanism. Then, I will be able to describe how important reflection is in the NestJS framework. Last, but not least, I would like to show you how easy it is to use reflection features in practice by implementing a simple IoC container live.

Warszawskie Dni Informatyki, 4Developers 2023, Gdańsk TypeScript Meetup