How TypeScript solved its global Iterator name clash

In ECMAScript 2025, JavaScript gets a class Iterator with iterator helper methods. This class conflicts with TypeScript’s existing types for iterators. In this blog post, we explore why that is and how TypeScript solves that conflict.


This content originally appeared on 2ality – JavaScript and more and was authored by Dr. Axel Rauschmayer

In ECMAScript 2025, JavaScript gets a class Iterator with iterator helper methods. This class conflicts with TypeScript’s existing types for iterators. In this blog post, we explore why that is and how TypeScript solves that conflict.


This content originally appeared on 2ality – JavaScript and more and was authored by Dr. Axel Rauschmayer


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