By default, NestJS uses Express under the hood. Moreover, since Express is very popular, NestJS can choose from a broad set of compatible third-party solutions. A significant advantage of NestJS is that it is framework-independent. Instead of using Express, we can use an adapter using another library with a similar request/response pipeline. The most popular […]
Express JavaScript NestJS Testing TypeScript
In the previous part of this series, we’ve focused on unit tests. This time, we look into integration tests. In this article, we explain their principles and how they differ from unit tests. We write a few of them using Jest to test our services. We also look into the SuperTest library to test our controllers. […]
Express JavaScript NestJS TypeScript
NestJS strives to focus on the maintainability and testability of the code. To do so, it implements various mechanisms such as the Dependency Injection. In this article, we inspect how NestJS can resolve dependencies by looking into the output of the TypeScript compiler. We also strive to understand the modular architecture that NestJS is built […]
When we develop a REST API, we have a set of HTTP methods that we can choose. An important thing to understand is that HTTP methods are, to a large extent, indicators of actions. Therefore, it is our job to make them work properly. In theory, not much stops us, for example, from deleting entities with […]
Mongoose does quite a bit of heavy-lifting for us. It is immensely useful, but not necessary in every case. In this article, we explore the Mongoose documents more and learn what we can achieve by giving up their benefits. Mongoose Document In the second part of this series, we’ve created our first models. They allow […]
Throughout this series, we’ve created some schemas and models for documents. We’ve also established ways to define relationships between them. We sometimes find ourselves needing many different properties in our documents. They sometimes overlap each other, and we might want to avoid duplicating the data in the database. Also, we might want to avoid two-way […]
When we are cold, we put on a shirt. If that’s not enough, we put a coat on top. Decorators work similarly. In this article, we discuss the principles of the decorator design pattern and talk about their implementation in TypeScript. We also briefly mention the JavaScript implementation of decorators using Babel. The basics of […]
Once our application is up and running, we want to deploy it. In this article, we explain what Continous Integration (CI) and Continuous Delivery (CD) is. We use Travis and Heroku as an example, but the knowledge can be used with other tools also. Both Travis and Heroku can be tried out for free. Continuous […]
Identity theft is a serious issue nowadays. With so many accidents happening on the web, it is a great time to learn about providing an additional layer of security for our users. In this article, we go through the principles and implementation of Node.js Two-Factor Authentication (2FA). We do that by using Google Authenticator and […]
The world is a tough place – a lot of people out there to get you! While I might not teach you some martial arts and self-defense here, I hope to raise your level of awareness where it comes to malicious code. NPM happens to serve it every now and then! Identifying the problem Serving […]
