tc39/ecma262 resource

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

15679 stars · 1429 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

The official source repository for ECMA-262, the ECMAScript (JavaScript) Language Specification, maintained by TC39. It contains the draft specification text, build tooling to render it as a readable document, and links to the TC39 proposal process.

Use cases

• read the official ECMAScript language specification
• check how a JavaScript language feature is defined normatively
• track the status of TC39 proposals for new JS features
• contribute a new proposal to the ECMAScript standard
• build the spec draft locally to review upcoming changes
• look up precise semantics of syntax like grammars and built-in objects

When to choose

• you need the authoritative, normative definition of JavaScript/ECMAScript behavior
• you are implementing a JS engine or transpiler and need exact semantics
• you want to follow or participate in the TC39 standardization process

When to avoid

• you want a beginner-friendly JavaScript tutorial or learning guide
• you need runnable code, libraries, or tools rather than a specification document
• you need documentation for a specific JS runtime's APIs like Node.js or the DOM

Facets

learning-resource · maturity active

documentation programming-language programming-languages documentation web-development cli ecmascript javascript language-specification tc39 standards spec-draft web-server

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