Deno v1.28.3 — 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 ⚡ Improvements 1 🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Deno v1.28.3. Source highlight: Revert "fix(ext/flash): graceful server startup/shutdown with unsettl…

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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(core): send "executionContextDestroyed" notification on program end
feat(core): show unresolved promise origin (#16650)
feat(core): support initializing extensions with and without JS (#16789)
feat(ops): fast calls for Wasm (#16776)
feat(ops): support raw pointer arguments (#16826)
feat(unstable): rework Deno.Command (#16812)

⚡ Performance & Enhancements (1)

perf(ops): Reenable fast unit result optimization (#16827)

🔧 Bug Fixes & Patches (6)

Revert "fix(ext/flash): graceful server startup/shutdown with unsettl…
fix(cli/js): improve resource sanitizer messages (#16798)
fix(coverage): Error if the emit cache is invalid (#16850)
fix(ext/ffi): Null buffer pointer value is inconsistent (#16625)
fix(ext/node): allow absolute path in createRequire (#16853)
fix(ext/web): fix typings for readable stream readers (#16191)

📄 View Raw Release Notes (Original Developer Log)

### 1.28.3 / 2022.12.01 - Revert "fix(ext/flash): graceful server startup/shutdown with unsettl… (#16839) - feat(core): send "executionContextDestroyed" notification on program end (#16831) - feat(core): show unresolved promise origin (#16650) - feat(core): support initializing extensions with and without JS (#16789) - feat(ops): fast calls for Wasm (#16776) - feat(ops): support raw pointer arguments (#16826) - feat(unstable): rework Deno.Command (#16812) - fix(cli/js): improve resource sanitizer messages (#16798) - fix(coverage): Error if the emit cache is invalid (#16850) - fix(ext/ffi): Null buffer pointer value is inconsistent (#16625) - fix(ext/node): allow absolute path in createRequire (#16853) - fix(ext/web): fix typings for readable stream readers (#16191) - fix(fmt/markdown): fix emoji width calculation in tables (#16870) - fix(inspector): send "isDefault" in aux data (#16836) - fix(lsp): analyze fs dependencies of dependencies to find npm package requirements (#16866) - fix(npm): allow to inspect npm modules with --inspect-brk (#16841) - fix(npm): better error message when attempting to use typescript in npm packages (#16813) - fix(npm): don't resolve JS files when resolving types (#16854) - fix(npm): ensure npm package downloaded once per run when using `--reload` (#16842) - fix(npm): improve package.json exports support for types (#16880) - fix(ops): circular dependency in deno_ops test (#16809) - fix(repl): more reliable history handling (#16797) - fix(repl): respect --quiet flag (#16875) - fix(runtime): feature-flag snapshot from snapshot (#16843) - fix(task): output encoding issues on windows (#16794) - perf(ops): Reenable fast unit result optimization (#16827)

← Older Version Deno v1.28.2 Newer Version → Deno v1.29.0