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Deno v1.23.1stable Released Jun 23, 2022
⚠️ Breaking Change Impact Score: 7/10

Deno v1.23.1 — 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.

Breaking-change evidence from the source

  • - BREAKING(unstable/ffi): Remove `Deno.UnsafePointer` indirection (#14915)
Read the original context ↗
Source flags breaking changes — review applicability
📄 .MD
✨ Features 1 ⚡ Improvements 2 🔧 Bug Fixes 6 ⚠️ Breaking & Deprecations 1
⚡ Executive Summary (TL;DR)

Deno v1.23.1. Source highlight: BREAKING(unstable/ffi): Remove `Deno.UnsafePointer` indirection (#14915)

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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.

⚠️ Breaking Changes & Deprecations (1)

  • - BREAKING(unstable/ffi): Remove `Deno.UnsafePointer` indirection (#14915)

✨ New Features & Capabilities (1)

  • feat(unstable/ffi): Callbacks (#14663)

⚡ Performance & Enhancements (2)

  • perf(core): Cache source lookups (#14816)
  • perf(ext/ffi): Optimize FFI Rust side type checks (#14923)

🔧 Bug Fixes & Patches (6)

  • fix(check): ignore TS2306 (#14940)
  • fix(docs): update description of `--check` flag (#14890)
  • fix(ext/fetch): add `accept-language` default header to fetch (#14882)
  • fix(ext/web): add EventTarget brand checking (#14637)
  • fix(ext/web): handle rid=0 in TextDecoder#decode (#14894)
  • fix(fmt): ignore node_modules directory (#14943)
📄 View Raw Release Notes (Original Developer Log)
### 1.23.1 / 2022.06.23 - BREAKING(unstable/ffi): Remove `Deno.UnsafePointer` indirection (#14915) - feat(unstable/ffi): Callbacks (#14663) - fix(check): ignore TS2306 (#14940) - fix(docs): update description of `--check` flag (#14890) - fix(ext/fetch): add `accept-language` default header to fetch (#14882) - fix(ext/web): add EventTarget brand checking (#14637) - fix(ext/web): handle rid=0 in TextDecoder#decode (#14894) - fix(fmt): ignore node_modules directory (#14943) - fix(fmt): should fail `--check` on parse error (#14907) - fix(repl): accept tab when previous character is whitespace (#14898) - fix(repl): use spaces for tab handler on windows (#14931) - fix: do not panic running .d.cts and .d.mts files (#14917) - fix: make Performance global an EventTarget - fix: upgrade swc via deno_ast 0.16 (#14930) - perf(core): Cache source lookups (#14816) - perf(ext/ffi): Optimize FFI Rust side type checks (#14923)
← Older Version Deno v1.23.0