Deno v1.30.0 — 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 6 🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Deno v1.30.0. Source highlight: feat(cli): add `DENO_V8_FLAGS` env var (#17313)

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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 (6)

feat(cli): add `DENO_V8_FLAGS` env var (#17313)
feat(fmt): add ability to configure semicolons (#17292)
feat(fmt): make semi-colon option a boolean (#17527)
feat(runtime): add bigint to seek typings (#17314)
feat(runtime/command): make stdin default to inherit for spawn() (#17334)
feat(runtime/os): add `Deno.env.has()` (#17315)

🔧 Bug Fixes & Patches (6)

fix(ext/ffi): disallow empty ffi structs (#17487)
fix(napi) use c_char instead of hardcoding i8 to avoid incompatibility with
fix(napi): correctly handle name in napi_create_function (#17489)
fix(napi): don't hold on to borrow during iteration (#17461)
fix(napi): handle return value from initializer (#17502)
fix(napi): improve napi_adjust_external_memory (#17501)

📄 View Raw Release Notes (Original Developer Log)

### 1.30.0 / 2023.01.25 - feat(cli): add `DENO_V8_FLAGS` env var (#17313) - feat(fmt): add ability to configure semicolons (#17292) - feat(fmt): make semi-colon option a boolean (#17527) - feat(runtime): add bigint to seek typings (#17314) - feat(runtime/command): make stdin default to inherit for spawn() (#17334) - feat(runtime/os): add `Deno.env.has()` (#17315) - feat(upgrade): link to release notes & blog post (#17073) - feat: Add sync APIs for "Deno.permissions" (#17019) - feat: ES module snapshotting (#17460) - feat: Stabilize Deno.Listener.ref/unref (#17477) - feat: allow first arg in test step to be a function (#17096) - feat: allow passing a ReadableStream to Deno.writeFile/Deno.writeTextFile (#17329) - feat: embed import map in the config file (#17478) - feat: log detection of config file (#17338) - feat: suggest adding a "node:" prefix for bare specifiers that look like built-in Node modules (#17519) - feat: support node built-in module imports (#17264) - fix(ext/ffi): disallow empty ffi structs (#17487) - fix(napi) use c_char instead of hardcoding i8 to avoid incompatibility with aarch64 (#17458) - fix(napi): correctly handle name in napi_create_function (#17489) - fix(napi): don't hold on to borrow during iteration (#17461) - fix(napi): handle return value from initializer (#17502) - fix(napi): improve napi_adjust_external_memory (#17501) - fix(napi): improve napi_detach_arraybuffer (#17499) - fix(napi): improve napi_is_detached_arraybuffer (#17498) - fix(upgrade): don't display release information for canary (#17516) - fix: remove leftover Deno.spawn references (#17524) - fix: support import map specified as data uri (#17531) - fix: update expected output for config auto-discovery debug log (#17514)

← Older Version Deno v1.29.4 Newer Version → Deno v1.30.1