Deno v1.40.5 — 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 4 ⚡ Improvements 1 🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Deno v1.40.5. Source highlight: feat(lsp): jsr support first pass (#22382)

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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 (4)

feat(lsp): jsr support first pass (#22382)
feat(lsp): jsr support with cache probing (#22418)
feat(publish): allow passing config flag (#22416)
feat(unstable): define config in publish url (#22406)

⚡ Performance & Enhancements (1)

perf: denort binary for `deno compile` (#22205)

🔧 Bug Fixes & Patches (6)

fix(console): support NO_COLOR and colors option in all scenarios (#21910)
fix(ext/node): export process.umask (#22348)
fix(ext/web): Prevent (De-)CompressionStream resource leak on stream
fix(lsp): complete npm specifier versions correctly (#22332)
fix: cache bust jsr deps on constraint failure (#22372)
fix: handle non-file scopes in synthetic import map (#22361)

📄 View Raw Release Notes (Original Developer Log)

### 1.40.5 / 2024.02.15 - feat(lsp): jsr support first pass (#22382) - feat(lsp): jsr support with cache probing (#22418) - feat(publish): allow passing config flag (#22416) - feat(unstable): define config in publish url (#22406) - perf: denort binary for `deno compile` (#22205) - fix(console): support NO_COLOR and colors option in all scenarios (#21910) - fix(ext/node): export process.umask (#22348) - fix(ext/web): Prevent (De-)CompressionStream resource leak on stream cancellation (#21199) - fix(lsp): complete npm specifier versions correctly (#22332) - fix: cache bust jsr deps on constraint failure (#22372) - fix: handle non-file scopes in synthetic import map (#22361) - fix: lockfile was sometimes getting corrupt when changing config deps (#22359) - fix: upgrade to deno_ast 0.33 (#22341)

← Older Version Deno v1.40.4 Newer Version → Deno v1.41.0