Announcing TypeScript 5.6
published on 2024/09/11
Since TypeScript 5.6 beta, we reverted a change around how TypeScript’s language service searched for tsconfig.json files. Previously the language service would keep walking up looking for every possible project file named tsconfig.json that might contain a file. Because this could lead to opening many referenced projects, we reverted the behavior and are investigating ways to bring back the behavior in TypeScript 5.7.
Additionally, several new types have been renamed since the beta. Previously, TypeScript provided a single type called BuiltinIterator to describe every value backed by Iterator.prototype. It has been renamed IteratorObject, has a different set of type parameters, and now has several subtypes like ArrayIterator, MapIterator, and more.