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Radar — JavaScript / TC39

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Recent JavaScript / TC39 changes

Jul 31, 2026

ES2026 — Jul 2, 2026

ECMAScript 2026 finalized — approved by TC39 in March 2026 and by Ecma International on June 30th, 2026.

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Jun 30, 2025

ES2025 — Jun 29, 2025

ECMAScript 2025 (16th edition) finalized — approved by TC39 in February 2025 and by Ecma on June 25th, 2025; the spec snapshot lives at tc39.es/ecma262/2025.

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RadarJul 31, 202615 topicsRadar — July 2026Release changes across JavaScript / TC39, Node.js, CSS / Web platform, Browsers, and more.2026-07

RadarJun 30, 202516 topicsRadar — June 2025Release changes across JavaScript / TC39, Node.js, CSS / Web platform, Browsers, and more.2025-06

These summaries link to the original release notes. They cover selected features, security updates, and migration changes.