TypeScript is gaining popularity as a type-safe alternative to JavaScript. Here's how to incrementally transform your JavaScript codebase into strongly typed TypeScript.

Arrived February 23, TypeScript 4.2 features enhancements pertaining to tuple types and type aliases. TypeScript 4.2 expands the ways rest elements in tuple types can be used.

The responsibilities are clearly separated: TypeScript = JavaScript + Types! This is a wonderful model. It means that the compiler output is human-readable JavaScript, just like the programmer wrote.

Thus, it is also available in TypeScript because TypeScript is built "on top of" JavaScript. However, typeof has limitations. For one, it only checks for the basic JavaScript types: Undefined, Null, ...

Dependent types are an interesting feature in TypeScript: Not only do they show what is happening in a program. They also prepare the code for things to come.

The new major release includes improved project organization through the app directory structure and enhanced TypeScript ...

It aligns with Node.js's experimental support for running TypeScript files directly, making it easier to transition from TypeScript to JavaScript execution. Performance Improvements: TypeScript 5.8 ...

Could JavaScript evolve to support a native type system—without needing TypeScript? A new proposal from the TypeScript team, submitted to ECMAScript’s TC39 committee, suggests exactly that. It ...