Oct 26 – Nov 1, 2026 · 18 commits
Iterator includes lands, DataView detaches get safer
Spec adds Iterator.prototype.includes, clarifies parsing and RegExp text, and changes DataView detached accessors to return 0.
Read the issue →tc39/ecma262
Oct 19–25, 2026 · 11 commits
Iterator helpers expand, join logic is refactored
New iterator chunk/window helpers land, while array/typed array joining and bitwise terminology are cleaned up across the spec.
Read the issue →Oct 12–18, 2026 · 2 commits
Spec clarifications sharpen realm and typed array semantics
Editorially clarified prototype realm fallback and fixed typed array algorithm assumptions around buffer detachment and shrinking.
Read the issue →Oct 5–11, 2026 · 6 commits
Numeric literal cleanup and a TypedArray correctness fix
Grammar simplifications landed alongside a fix to TypedArray revalidation for multi-byte elements on growable SharedArrayBuffers.
Read the issue →Sep 28 – Oct 4, 2026 · 6 commits
Spec clarifies number/time terminology and adds Iterator.join
Editorial cleanup around finite numbers/time values plus a new Iterator.prototype.join() method with precise semantics.
Read the issue →Sep 14–20, 2026 · 2 commits
TypedArray setters clarified; ESMeta tooling refreshed
A small week focused on editorial TypedArray return-value cleanup and a workflow/tooling bump for ESMeta checks.
Read the issue →Sep 7–13, 2026 · 3 commits
Typed array spec cleanup tightens indexed access wording
Editorial updates refine typed array algorithms, standardize internal names, and fix a few wording details with no behavior change.
Read the issue →Aug 31 – Sep 6, 2026 · 1 commits
Ecmarkup dependency bump enables searchable output
A quiet week with a single ecmarkup upgrade to support searchable output and a lockfile refresh.
Read the issue →Aug 24–30, 2026 · 16 commits
Promise.try semantics tightened, broad spec cleanup
Promise.try now uses PromiseResolve, alongside a large wave of editorial and terminology cleanup across the spec.
Read the issue →Aug 17–23, 2026 · 10 commits
Spec wording tightened for iterators, integers, and Temporal
Editorial cleanup plus sharper abstract ops and iterator/Temporal wording updates; no behavioral changes.
Read the issue →Aug 3–9, 2026 · 18 commits
TC39 adds shared index helpers and tightens TypedArray rules
A quiet week with two notable spec cleanups: reusable index helpers across built-ins and a clearer TypedArray validation model.
Read the issue →Jul 13–19, 2026 · 5 commits
Spec wording tightened and ecmarkup refreshed
A quiet week with a few editorial spec clarifications and an ecmarkup bump to refresh generated output.
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