There are many NestJS tools at your disposal when building an application, specifically:

• Middleware

• Guards

• Interceptors

• Pipes

• Exception Filters

• Decorators

In this project, we’re going to explore the purpose of these tools, how they fit together and the order of their execution in the NestJS lifecycle by building a random emoji generator API.

With this understanding, you’ll have an excellent foundation for building NestJS applications for the projects ahead.