TypeScript 5.0 Features Every Developer Should Use 🚀

TypeScript continues to evolve as the backbone of modern JavaScript development, and TypeScript 5.0 is one of its most impactful releases. It focuses on better performance, smarter type inference, and developer productivity—without breaking existing code.

In this article, we’ll explore the most useful TypeScript 5.0 features that every developer should start using today, with simple explanations and real examples.

1. D*ecorators Are Now Stable (Big Win 🎉): * They allow you to annotate and modify classes, methods, fields, and accessors in a clean and readable way.

function Log(target: any, context: ClassMethodDecoratorContext) {
console.log(Method ${String(context.name)} was defined);
}

class UserService {
@log
getUser() {
return "User data";
}
}

1. Faster Builds with Project References Improvements ⚡ TypeScript 5.0 significantly improves build speed, especially for large codebases and monorepos.

What changed?
Faster incremental builds
Improved --build mode
Smarter dependency tracking

Why it matters
Less waiting during development
Better CI/CD performance
Ideal for enterprise and startup-scale apps

1. Improved const Type Parameters

function getConfig(config: T) {
return config;
}

const settings = getConfig(["dark", "light"]);
// type is readonly ["dark", "light"], not string[]