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Deno v0.9.0stable Released Jun 15, 2019
Impact Score: 5/10

Deno v0.9.0 — 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 3
⚡ Executive Summary (TL;DR)

Deno v0.9.0. Source highlight: feat: add deno install command (#2522)

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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: add deno install command (#2522)
  • feat: URLSearchParams should work with custom iterator (#2512)
  • feat: default output filename for deno bundle (#2484)
  • feat: expose window.Response (#2515)
  • feat: Add --seed for setting RNG seed (#2483)
  • feat: Import maps (#2360)

🔧 Bug Fixes & Patches (3)

  • fix: setTimeout API adjustments (#2511, #2497)
  • fix: URL and URLSearchParams bugs (#2495, #2488)
  • fix: make global request type an interface (#2503)
📄 View Raw Release Notes (Original Developer Log)
### Changes In deno: - feat: add deno install command (#2522) - feat: URLSearchParams should work with custom iterator (#2512) - feat: default output filename for deno bundle (#2484) - feat: expose window.Response (#2515) - feat: Add --seed for setting RNG seed (#2483) - feat: Import maps (#2360) - fix: setTimeout API adjustments (#2511, #2497) - fix: URL and URLSearchParams bugs (#2495, #2488) - fix: make global request type an interface (#2503) - upgrade: V8 to 7.7.37 (#2492) In deno_std: - feat: installer (denoland/deno_std#489) - feat: bundle loader (denoland/deno_std#480) ### Install / Upgrade **With Shell:** ```sh curl -fsSL https://deno.land/x/install/install.sh | sh -s v0.9.0 ``` **With PowerShell:** ```powershell iwr https://deno.land/x/install/install.ps1 -useb -outf install.ps1; .\install.ps1 v0.9.0 ```
← Older Version Deno v0.8.0