Deno v1.39.2 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: deno · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

📄 .MD

✨ Features 3 ⚡ Improvements 3 🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Deno v1.39.2. Source highlight: Revert "fix(runtime): Make native modal keyboard interaction consistent with

Visit Deno Official Site ↗ Official Release Source ↗ All Deno Releases 📡 Deno RSS

Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

✨ New Features & Capabilities (3)

feat(lsp): allow to connect V8 inspector (#21482)
feat(lsp): cache jsxImportSource automatically (#21687)
feat(unstable): only allow http2 for kv remote backend (#21616)

⚡ Performance & Enhancements (3)

perf(coverage): faster source mapping (#21783)
perf(lsp): use LanguageServiceHost::getProjectVersion() (#21719)
perf: remove opAsync (#21690)

🔧 Bug Fixes & Patches (6)

Revert "fix(runtime): Make native modal keyboard interaction consistent with
fix(ci): copyright year for console_test.ts (#21787)
fix(cli): harden permission stdio check (#21778)
fix(cli): make signals tests more reliable (#21772)
fix(cli): respect `exclude` option for `deno check` command (#21779)
fix(ext/http): use arraybuffer binaryType for server websocket (#21741)

📄 View Raw Release Notes (Original Developer Log)

### 1.39.2 / 2024.01.04 - Revert "fix(runtime): Make native modal keyboard interaction consistent with browsers" (#21739) - feat(lsp): allow to connect V8 inspector (#21482) - feat(lsp): cache jsxImportSource automatically (#21687) - feat(unstable): only allow http2 for kv remote backend (#21616) - fix(ci): copyright year for console_test.ts (#21787) - fix(cli): harden permission stdio check (#21778) - fix(cli): make signals tests more reliable (#21772) - fix(cli): respect `exclude` option for `deno check` command (#21779) - fix(ext/http): use arraybuffer binaryType for server websocket (#21741) - fix(ext/node): Implement `aes-192-ecb` and `aes-256-ecb` (#21710) - fix(ext/node): UdpSocket ref and unref (#21777) - fix(ext/node): add ClientRequest#setNoDelay (#21694) - fix(ext/node): add process.abort() (#21742) - fix(ext/node): implement os.machine (#21751) - fix(ext/node): querystring stringify without encode callback (#21740) - fix(ext/node): use node:process in _streams.mjs (#21755) - fix(http_client): Fix Deno.createHttpClient to accept poolIdleTimeout parameter (#21603) - fix(jupyter): error message when install fails due to jupyter command not being on PATH (#21767) - fix(lsp): support test code lens for Deno.test.{ignore,only}() (#21775) - fix(node): Implement os.cpus() (#21697) - fix(node): support nested tests in "node:test" (#21717) - fix(node/zlib): accept dataview and buffer in zlib bindings (#21756) - fix(node/zlib): cast Dataview and Buffer to uint8 (#21746) - fix(node/zlib): consistently return buffer (#21747) - fix(unstable): kv watch should stop when db is closed (#21665) - fix(unstable/byonm): support using an import map with byonm (#21786) - fix: `Object.groupBy` return type should be a partial (#21680) - fix: allow npm: specifiers in import.meta.resolve (#21716) - fix: strict type check for cross realms (#21669) - perf(coverage): faster source mapping (#21783) - perf(lsp): use LanguageServiceHost::getProjectVersion() (#21719) - perf: remove opAsync (#21690)

← Older Version Deno v1.39.1 Newer Version → Deno v1.39.3