TypeScript 5.5, now in a release candidate, also features inferred type predicates, regular expression syntax checking, and performance and size optimizations.

Next TypeScript release, due February 25, will support a limited form of checking against conditional and indexed acces types in return statements.

Low Maintenance Types in TypeScript 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.

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.