TypeScript has evolved from a simple type system for JavaScript into a powerful tool for building robust applications. Let's explore some advanced patterns that can take your TypeScript skills to the next level.
Discriminated unions are a powerful pattern for handling different states in your application. By using a common property as a discriminator, TypeScript can narrow types automatically and ensure you handle all cases.
Template literal types, introduced in TypeScript 4.1, allow you to create complex string types. This is particularly useful for API routes, CSS class names, and other string-based patterns.
The infer keyword in conditional types enables you to extract types from other types. This is incredibly powerful for creating utility types that work with function parameters, return types, and more.
Branded types (also known as nominal types) let you create distinct types from primitive types. This prevents accidentally mixing up IDs, currencies, or other values that share the same underlying type.
At NextGen Softwares, we use these patterns extensively in our projects. Our Dexpose dashboard, for example, uses discriminated unions to handle different threat types, ensuring type safety throughout the application.
Written by Ahmed Fathy
Author at NextGen Softwares
