This International Standard defines the ECMAScript Specification Suite containing the ECMAScript programming language and its required and optional built-in libraries. It defines all the necessary components (both normative and informative) that is needed to implement this suite of standards. This suite does not change if one or more components are updated by a new standard edition. The Suite changes only when new components are added and / or old components are removed from it.st edition 2018-05 Information technology — Programming languages, their environments, and system software interfaces — ECMAScript？ Specification Suite Technologies de l'information — Langages de programmation, leur environnement et interfaces des logiciels de systèmes — Suite de spécifications ECMAScript？ Reference number ISO/IEC 22275:2018(E) ？ ISO/IEC 2018 ISO/IEC 22275:2018(E) CO