Deno v1.37.0stable Released Sep 19, 2023
Impact Score: 5/10

Deno v1.37.0 โ€” Release Notes & Engineering Impact

Source available โ€” automated, not human-reviewed

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

Analysis updated: 2026-11-01.

Compatibility not verified โ€” check source notes
๐Ÿ“„ .MD
โšก Executive Summary (TL;DR)

Deno v1.37.0. Source highlight: feat: Add "deno jupyter" subcommand (#20337, #20552, #20530, #20537, #20546)

Who Does This Impact? (Role-Based Analysis)

๐Ÿ’ป Software Engineers & Devs

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

๐Ÿ“Š Product & Engineering Leads

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

โš™๏ธ DevOps & Security

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

โœจ New Features & Capabilities (6)

  • feat: Add "deno jupyter" subcommand (#20337, #20552, #20530, #20537, #20546)
  • feat(test): add TAP test reporter (#14390, #20073)
  • feat(ext/node): http2.connect() API (#19671)
  • feat(ext/web): Add name to `Deno.customInspect` of File objects (#20415)
  • feat(lint): `--rules` print all rules (#20256)
  • feat(lockfile): add redirects to the lockfile (#20262)

โšก Performance & Enhancements (6)

  • perf(ext/http): optimize `set_response` for small responses (#20527)
  • perf(ext/node): Optimise Buffer string operations (#20158)
  • perf(ext/streams): optimize async iterator (#20541)
  • perf(node/net): optimize socket reads for 'npm:ws' package (#20449)
  • perf: improve async op santizer speed and accuracy (#20501)
  • perf: make `deno test` 10x faster (#20550)

๐Ÿ”ง Bug Fixes & Patches (6)

  • fix(cli): ensure that an exception in getOwnPropertyDescriptor('constructor')
  • fix(cli): for main-module that exists in package.json, use the version defined
  • fix(compile): support providing flags as args (#20422)
  • fix(evt/kv): Add serde feature to uuid (#20350)
  • fix(ext/crypto): remove EdDSA alg key checks and export (#20331)
  • fix(ext/http): create a graceful shutdown API (#20387)
๐Ÿ“„ View Raw Release Notes (Original Developer Log)
### 1.37.0 / 2023.09.19 - feat: Add "deno jupyter" subcommand (#20337, #20552, #20530, #20537, #20546) - feat(test): add TAP test reporter (#14390, #20073) - feat(ext/node): http2.connect() API (#19671) - feat(ext/web): Add name to `Deno.customInspect` of File objects (#20415) - feat(lint): `--rules` print all rules (#20256) - feat(lockfile): add redirects to the lockfile (#20262) - feat(lsp): WorkspaceSettings::disablePaths (#20475) - feat(lsp): enable via config file detection (#20334, #20349) - feat(lsp): include source in auto import completion label (#20523) - feat(lsp): npm specifier completions (#20121) - feat(lsp): provide the deno.cache command server-side (#20111) - feat(lsp): update imports on file rename (#20245) - feat(test): Add Deno.test.ignore and Deno.test.only (#20365) - feat(unstable): package manager (#20517) - feat: TypeScript 5.2 (#20425) - feat: explicit resource management in TypeScript (#20506) - feat: lockfile v3 (#20424) - feat: support import attributes (#20342) - fix(cli): ensure that an exception in getOwnPropertyDescriptor('constructor') doesn't break Deno.inspect (#20568) - fix(cli): for main-module that exists in package.json, use the version defined in package.json directly (#20328) - fix(compile): support providing flags as args (#20422) - fix(evt/kv): Add serde feature to uuid (#20350) - fix(ext/crypto): remove EdDSA alg key checks and export (#20331) - fix(ext/http): create a graceful shutdown API (#20387) - fix(ext/http): ensure aborted bodies throw (#20503) - fix(ext/kv): add a warning for listenQueue if used with remote KV (#20341) - fix(ext/kv): same `expireIn` should generate same `expireAt` (#20396) - fix(ext/node): implement AES GCM cipher (#20368) - fix(ext/node): remove unnecessary and incorrect type priority_t (#20276) - fix(ext/node/ops/zlib/brotli): Allow decompressing more than 4096 bytes (#20301) - fix(fmt/markdown): improve ignore comment handling (#20421) - fix(init): skip existing files instead of erroring (#20434) - fix(lsp): always enable semantic tokens responses (#20440) - fix(lsp): force correct media type detection from tsc (#20562) - fix(lsp): include JSON modules in local import completions (#20536) - fix(lsp): match enable_paths by whole path components (#20470) - fix(lsp): pass quote preference to tsc (#20547) - fix(lsp): prefer local auto-import specifiers (#20539) - fix(lsp): properly handle disabled configuration requests (#20358) - fix(lsp): recreate npm search cache when cache path changes (#20327) - fix(lsp): refresh npm completions on each character (#20565) - fix(lsp): respect configured exclusions for testing APIs (#20427) - fix(lsp): restore tsc's quick fix ordering (#20545) - fix(lsp): sort quickfix actions (#17221) - fix(node): Bump hardcoded version to latest (#20366) - fix(node/child_process): don't crash on undefined/null value of an env var (#20378) - fix(node/http): correctly send `Content-length` header instead of `Transfer-Encoding: chunked` (#20127) - fix(npm): properly handle legacy shasum of package (#20557) - fix(runtime/permissions): Resolve executable specifiers in allowlists and queries (#14130) - fix(test): apply filter before checking for "only" (#20389) - fix(test): share fail fast tracker between threads (#20515) - fix: `Deno.Command` - improve error message when `cwd` is not a directory (#20460) - fix: don't show filtered test suites as running (#20385) - fix: empty include in config file excludes all (#20404) - fix: exclude internal JS files from coverage (#20448) - fix: init v8 platform once on main thread (#20495) - fix: output traces for op sanitizer in more cases (#20494) - perf(ext/http): optimize `set_response` for small responses (#20527) - perf(ext/node): Optimise Buffer string operations (#20158) - perf(ext/streams): optimize async iterator (#20541) - perf(node/net): optimize socket reads for 'npm:ws' package (#20449) - perf: improve async op santizer speed and accuracy (#20501) - perf: make `deno test` 10x faster (#20550)