Check out all our TypeScript tutorials.
While working on a recent feature that displayed important dates in a user-friendly format, I encountered an issue. The ISO date string, like “2025-07-04T00:00:00.000Z,” was showing up as July 3 instead of July 4 in the UI. At first, it seemed like a simple formatting issue, but it turned out to be a classic time … Read more >>
While building an e-commerce application in TypeScript, you might define a ProductCategory enum for valid categories like ‘electronics’, ‘clothing’, and ‘food’. When receiving data from a user or an API, it’s important to check if the provided category actually exists in the enum. This prevents invalid values from being processed or stored. This ensures your … Read more >>
Suppose you’re building an admin panel for a web app where users can have one of several roles, such as admin, editor, or viewer. You receive the user role from a backend API as a string, and you want to check whether this string is a valid role according to your enum before using it … Read more >>
When I was working on a TypeScript project recently, I got a requirement to show dates from a system that sent me big numbers like 1623456789000. These numbers are called timestamps, and they represent a date and time, but in a format that’s hard to read. In this blog, I will show you how to … Read more >>
Avoiding duplicate enum values in TypeScript is important to maintain clarity and avoid unexpected behavior when using enums. Here’s a realistic scenario showing how duplicate values can cause problems and how to avoid them. In this tutorial, we will learn how to avoid duplicate Enum values in TypeScript, how duplicate enum values can lead to … Read more >>
Have you ever seen your app behave strangely just because someone entered the wrong date? For example, a user might type “2025-02-30”, which is not even a real date or the used date format is not valid for the app’s date settings. These small issues can cause big problems if we don’t handle them properly. … Read more >>
When working with TypeScript, it’s crucial to understand the difference between undefined and null. Both undefined and null are used to represent the absence of a value, but they have distinct meanings and behaviors. In this tutorial, we’ll dive deep into the difference between undefined and null in TypeScript, explore their use cases, and provide … Read more >>
While building an admin panel, when an admin selects a user, their details are fetched from the server and stored in a userInfo object. But sometimes, the server returns an empty object ({}), meaning no user was found. Understanding how to perform this check efficiently can prevent potential bugs and improve your application’s performance. We … Read more >>
Imagine you work in a coffee shop and want to write a program to handle coffee orders. You create an enum to list coffee sizes like Small, Medium, and Large. Then, you write a function that takes a size from this enum and gives the correct price. Using enums helps make sure only the correct … Read more >>
When comparing values in TypeScript, developers have two options: the loose equality operator (==) and the strict equality operator (===). Although they may seem similar, there are crucial differences between these operators that every TypeScript developer should understand. In this tutorial, we’ll dive deep into how == different from === in TypeScript, explore their loose … Read more >>
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