Provides ECMAScript specification abstract operations as a JavaScript module, with access by edition and name (for example, `es-abstract/2020/Call` or `es-abstract/5/Type`). Useful if you need standardized spec-level operation implementations, and it also offers `es5` through `es2021` entry points, with deep imports encouraged for bundle size and performance.
Project status
- Actively maintained: The repo shows ongoing work, with an upstream push on 2026-06-26 and the most recent published package update being v1.24.2 on 2026-04-07, indicating it is not currently in maintenance mode.
- Update cadence: Prior updates appear to land roughly every 3 to 6 months (for example, v1.24.1 on 2025-12-13, v1.24.2 on 2026-04-07), with no long multi-year gaps visible in the provided history.
AI summary generated
Recent updates
v1.24.2
Release v1.24.2 includes a set of small internal runtime changes (mostly replacing `undefined` with `void undefined`), plus a more substantial behavioral change in the BigInt absolute value implementation. No release notes were provided, so all changes below are effectively undocumented from the publisher’s perspective.
v1.24.1
Release v1.24.1 contains no publisher-provided release notes. The code diff indicates mostly lint/config cleanup plus a meaningful runtime behavior change in generator abrupt-resume handling.
v1.24.0
Release v1.24.0 was published on 2025-05-29, but the publisher provided no release notes. As a result, this analysis cannot determine new features, breaking changes, bug fixes, security, or dependency updates from the release notes alone.
v1.23.10
No release notes were provided for v1.23.10. The code diff shows a large internal refactor across many ECMAScript-abstract-operation modules (notably swapping object-type helpers, adjusting some algorithm details), plus a CI update to test Node.js 24.
Breakingv1.23.9
v1.23.9 primarily performs a refactor around prototype handling by switching internal helpers and algorithms to use the external `get-proto` and `set-proto` packages. The release notes field is empty, so these changes are not explicitly documented there.
Breakingv1.23.8
v1.23.8 is a small refactor release with no publisher-provided release notes. The code changes primarily swap internal helpers to use new dependencies, replacing an older OwnPropertyKeys helper implementation with the `own-keys` package and replacing an intrinsic-based push.apply call with `safe-push-apply`.
v1.23.7
v1.23.7 does not include any publisher-provided release notes. The code diff indicates a large internal refactor focused on centralizing “property key” and Date “getTime” checks via shared helpers, with many assertion error messages adjusted accordingly.
Breakingv1.23.6
Release v1.23.6 has no published release notes, while the code diff shows a broad internal refactor across the ECMAScript abstract-algorithm implementation files. Most changes are import/source swaps (math-intrinsics, call-bound) and assertion logic updates (Type to isObject), with a few potential behavior changes in typed-array handling and buffer float conversions.
Breakingv1.23.5
This patch release (v1.23.5) updates the `CompletionRecord` implementation for ES2015+ to change the behavior of the `?` operator. Instead of only supporting `normal` and `throw`, `?` now returns the completion value for any non-`throw` completion type, and still throws the value for `throw` completions.
v1.23.4
Release v1.23.4 was published on 2024-11-13. No release notes were provided by the publisher, so there is no documented information about new features, fixes, breaking changes, or security updates in this release.