TypeScript works in a way that automates a lot of the work for us. We don’t have to write types every time, because the compiler works hard to derive them from the context. In this article, we look into more complex cases that involve the infer keyword and const assertions. The basics of type inference First, let’s look […]
One of the qualities of our code that we should aim for is reusability. Also, following the Don’t Repeat Yourself principle makes our code more elegant. In this article, we explore writing functional React components with TypeScript using generic props. By doing so, we can create reusable and flexible components. If you would like to […]
Fetching resources is a bread and butter of the frontend development. When doing so, we might encounter a set of issues related to race conditions. In this article, we identify them and provide a solution. Defining a race condition The term “race condition” dates back to as far as 1954. We use it in the field […]
JavaScript TypeScript Uncategorized
Previously, we’ve discussed the basics of TypeScript Generics. This time, we take them to a higher level. In this article, we learn about index types. To do so, we also explore union types, the keyof keyword, and string literal types. Today we also learn mapped types and use them with conditional types. Index types Generics are very useful in many situations. […]
We can find the concept of generic types across many languages such as Java, C#. Naturally, they found their way into TypeScript. In this article, we discuss their purpose and provide various examples. We also discuss naming conventions for generics that we can stumble upon. Introducing TypeScript Generics One of the qualities that we strive […]
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 […]
The SOLID principles were defined quite some time ago and are still relatable. Their goal is to make our software easier to understand, read, and extend. We accredit this concept to Robert C. Martin from his paper from the year 2000. The actual SOLID acronym was defined later, though. In this article, we go through all […]
When implementing TypeScript in our projects, we strive to write the best typings we can. We might often feel like using the any type defeats the purpose of TypeScript, and rightfully so. There are also some other types worth knowing, and we might find them useful when trying not to use any, like the unknown. In this article, we […]
The Observer pattern is common among various native JavaScript features and many libraries. The above is just one of the reasons to look into it more. In this article, we learn the principles of the Observer pattern. We also add some TypeScript typings to it, to make it more bug-proof. The core principle of the […]
Cypress has proven to be an appropriate tool for writing E2E tests. In the previous parts of this series, we’ve gone through its basics. That’s a proper moment to take a look at a useful addition: the Gherkin syntax. In this article, we look into its principles and how to make a Cypress Cucumber integration. […]
