Overview
ISO/IEC 22275:2018 defines the ECMAScript Specification Suite, a consolidated set of standards that together specify the ECMAScript programming language, its required and optional built-in libraries, and related components. The Suite aggregates normative and informative references (rather than embedding full text) so that the Suite only changes when components are added or removed. This approach supports consistent implementations and stable conformance expectations across web browsers, server runtimes and other ECMAScript environments.
Why this standard matters:
- Establishes a clear collection of documents that constitute the ECMAScript Specification Suite
- Ensures implementers target the correct language and library specifications
- Supports portability, interoperability and predictable behavior across environments
Key Topics
- ECMAScript language core: The Suite relies on the ECMA-262 language specification to define syntax, semantics and the execution environment for ECMAScript programs.
- Built-in libraries: Required and optional libraries are part of the Suite. Implementations must conform to ECMA-262 for the required library and may include optional libraries such as the internationalization API.
- Internationalization (i18n): Where included, the ECMAScript Internationalization API (ECMA-402) is the optional library for adapting programs to linguistic and cultural conventions.
- JSON interchange: The Suite references ISO/IEC 21778 (adoption of ECMA-404) for the JSON data interchange syntax, ensuring data portability between systems.
- Test support: ECMA TR/104 (ECMAScript Test Suite) provides non-normative tests to help verify conformance of implementations.
Applications
The ECMAScript Specification Suite is directly applicable to implementers, tool vendors and organizations that rely on ECMAScript-based technologies:
- Web browsers and browser engine developers ensuring ECMAScript behavior parity
- Server-side JavaScript platforms and runtimes seeking standard conformance
- Embedded scripting environments (IoT, devices) that implement ECMAScript
- Library authors and framework maintainers ensuring compatibility with language and built-in APIs
- Internationalized applications that depend on consistent locale-sensitive behavior
Adopting the Suite helps teams reduce interoperability issues, speed cross-platform development, and rely on a stable set of referenced specifications.
Related Standards
- ECMA-262 - ECMAScript Language Specification (core language and required library)
- ECMA-402 - ECMAScript Internationalization API Specification (optional)
- ISO/IEC 21778 - The JSON data interchange syntax (adoption of ECMA-404)
- ECMA TR/104 - ECMAScript Test Suite (non-normative test resources)
For implementers and QA teams, ISO/IEC 22275:2018 provides a practical reference to the components that collectively define ECMAScript behavior, enabling reliable, interoperable JavaScript ecosystems.