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Deno v1.40.4stable Released Feb 08, 2024
Impact Score: 5/10

Deno v1.40.4 — 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 2 ⚡ Improvements 1 🔧 Bug Fixes 6
⚡ Executive Summary (TL;DR)

Deno v1.40.4. Source highlight: feat(unstable): `Deno.FsFile.lock[Sync]()` and `Deno.FsFile.unlock[Sync]()`

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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 (2)

  • feat(unstable): `Deno.FsFile.lock[Sync]()` and `Deno.FsFile.unlock[Sync]()`
  • feat: ARM64 builds (#22298)

⚡ Performance & Enhancements (1)

  • perf: remove duplicate `env::current_dir` call in package.json search (#22255)

🔧 Bug Fixes & Patches (6)

  • fix(cli): Add IP address support to DENO_AUTH_TOKEN (#22297)
  • fix(ext/node): Ensure os.cpus() works on arm64 linux (#22302)
  • fix(ext/node): fix timeout param validation in cp.execFile (#22262)
  • fix(jupyter): ensure op is available (#22240)
  • fix(lint): point to migration docs in deprecated APIs rule (#22338)
  • fix(lsp): disable no-cache diagnostics for jsr specifiers (#22284)
📄 View Raw Release Notes (Original Developer Log)
### 1.40.4 / 2024.02.08 - feat(unstable): `Deno.FsFile.lock[Sync]()` and `Deno.FsFile.unlock[Sync]()` (#22235) - feat: ARM64 builds (#22298) - fix(cli): Add IP address support to DENO_AUTH_TOKEN (#22297) - fix(ext/node): Ensure os.cpus() works on arm64 linux (#22302) - fix(ext/node): fix timeout param validation in cp.execFile (#22262) - fix(jupyter): ensure op is available (#22240) - fix(lint): point to migration docs in deprecated APIs rule (#22338) - fix(lsp): disable no-cache diagnostics for jsr specifiers (#22284) - fix(node): add `cp` to fs/promises (#22263) - fix(node): handle brotli compression end chunk sizes (#22322) - fix(os): total and free memory in bytes (#22247) - fix(publish): 'explit' typo (#22296) - fix(publish): handle diagnostic outside graph (#22310) - fix(publish): lazily parse sources (#22301) - fix(publish): use lighter crate for opening browser (#22224) - fix(test/regression): handle CLI arg directory using `../` in path (#22244) - fix(unstable): validate kv list selector (#22265) - fix: Fix segmentation fault in tests on CPUs with PKU support (#22152) - fix: Support Symbol.metadata (#22282) - fix: enable "--allow-sys=cpus" for "deno run" (#22260) - perf: remove duplicate `env::current_dir` call in package.json search (#22255)
← Older Version Deno v1.40.3