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Deno v1.2.3stable Released Aug 09, 2020
Impact Score: 5/10

Deno v1.2.3 — 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 1 🔧 Bug Fixes 6
⚡ Executive Summary (TL;DR)

Deno v1.2.3. Source highlight: fix: Never type check in deno info (#6978)

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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 (1)

  • feat(unstable): custom http client for fetch (#6918)

🔧 Bug Fixes & Patches (6)

  • fix: Never type check in deno info (#6978)
  • fix: add missing globals to unstable diagnostics (#6960)
  • fix: add support for non-UTF8 source files (#6789)
  • fix: hash file names in gen cache (#6911)
  • fix(std/toml): parser error with inline comments (#6942)
  • fix(std/encoding/toml): Add boolean support to stringify (#6941)
📄 View Raw Release Notes (Original Developer Log)
### 1.2.3 / 2020.08.08 Changes in the CLI: - fix: Never type check in deno info (#6978) - fix: add missing globals to unstable diagnostics (#6960) - fix: add support for non-UTF8 source files (#6789) - fix: hash file names in gen cache (#6911) - refactor: Encode op errors as strings instead of numbers (#6977) - refactor: Op crate for Web APIs (#6906) - refactor: remove repeated code in main.rs (#6954) - upgrade to rusty_v8 0.8.1 / V8 8.6.334 (#6980) - upgrade: deno_lint v0.1.21 (#6985) - upgrade: swc_ecmascript (#6943) - feat(unstable): custom http client for fetch (#6918) Changes in std version 0.64.0: - fix(std/toml): parser error with inline comments (#6942) - fix(std/encoding/toml): Add boolean support to stringify (#6941) - refactor: Rewrite globToRegExp() (#6963) ### Install / Upgrade **Using Deno:** ```sh deno upgrade --version 1.2.3 ``` **With Shell:** ```sh curl -fsSL https://deno.land/x/install/install.sh | sh -s v1.2.3 ``` **With PowerShell:** ```powershell $v="1.2.3"; iwr https://deno.land/x/install/install.ps1 -useb | iex ```
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