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Deno v1.2.2stable Released Jul 31, 2020
Impact Score: 5/10

Deno v1.2.2 — 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 v1.2.2. Source highlight: fix: Change release build flags to optimize for size (#6907)

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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): add "--ignore" flag to deno fmt (#6890)
  • feat(std/async): add pooledMap utility (#6898)

⚡ Performance & Enhancements (1)

  • perf: Use SWC to strip types for "--no-check" flag (#6895)

🔧 Bug Fixes & Patches (6)

  • fix: Change release build flags to optimize for size (#6907)
  • fix: Fix file URL to path conversion on Windows (#6920)
  • fix: deno-types, X-TypeScript-Types precedence (#6761)
  • fix: downcast from SwcDiagnosticBuffer to OpError (#6909)
  • fix(std/json): Add newline at the end of json files (#6885)
  • fix(std/path): Percent-decode in fromFileUrl() (#6913)
📄 View Raw Release Notes (Original Developer Log)
### 1.2.2 / 2020.07.31 Changes in the CLI: - fix: Change release build flags to optimize for size (#6907) - fix: Fix file URL to path conversion on Windows (#6920) - fix: deno-types, X-TypeScript-Types precedence (#6761) - fix: downcast from SwcDiagnosticBuffer to OpError (#6909) - perf: Use SWC to strip types for "--no-check" flag (#6895) - upgrade: deno_lint, dprint, swc (#6928, #6869) - feat(unstable): add "--ignore" flag to deno fmt (#6890) Changes in std version 0.63.0: - feat(std/async): add pooledMap utility (#6898) - fix(std/json): Add newline at the end of json files (#6885) - fix(std/path): Percent-decode in fromFileUrl() (#6913) - fix(std/tar): directory type bug (#6905) ### Install / Upgrade **Using Deno:** ```sh deno upgrade --version 1.2.2 ``` **With Shell:** ```sh curl -fsSL https://deno.land/x/install/install.sh | sh -s v1.2.2 ``` **With PowerShell:** ```powershell $v="1.2.2"; iwr https://deno.land/x/install/install.ps1 -useb | iex ```
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