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Deno v1.9.1stable Released Apr 21, 2021
Impact Score: 5/10

Deno v1.9.1 — 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.

Compatibility not verified — check source notes
📄 .MD
✨ Features 4 🔧 Bug Fixes 6
⚡ Executive Summary (TL;DR)

Deno v1.9.1. Source highlight: feat(lsp, unstable): Implement textDocument/documentSymbol (#9981)

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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 (4)

  • feat(lsp, unstable): Implement textDocument/documentSymbol (#9981)
  • feat(lsp, unstable): implement textDocument/prepareCallHierarchy (#10061)
  • feat(lsp, unstable): Implement textDocument/semanticTokens/full (#10233)
  • feat(lsp, unstable): improve diagnostic status page (#10253)

🔧 Bug Fixes & Patches (6)

  • fix: revert changes to Deno.Conn type (#10255)
  • fix(lsp): handle x-typescript-types header on type only imports properly (#10261)
  • fix(lsp): remove documents when closed (#10254)
  • fix(runtime): correct URL in Request (#10256)
  • fix(runtime): handle race condition in postMessage where worker has terminated (#10239)
  • fix(runtime): hang during HTTP server response (#10197)
📄 View Raw Release Notes (Original Developer Log)
### 1.9.1 / 2021.04.20 - feat(lsp, unstable): Implement textDocument/documentSymbol (#9981) - feat(lsp, unstable): implement textDocument/prepareCallHierarchy (#10061) - feat(lsp, unstable): Implement textDocument/semanticTokens/full (#10233) - feat(lsp, unstable): improve diagnostic status page (#10253) - fix: revert changes to Deno.Conn type (#10255) - fix(lsp): handle x-typescript-types header on type only imports properly (#10261) - fix(lsp): remove documents when closed (#10254) - fix(runtime): correct URL in Request (#10256) - fix(runtime): handle race condition in postMessage where worker has terminated (#10239) - fix(runtime): hang during HTTP server response (#10197) - fix(runtime): include HTTP ops in WebWorker scope (#10207) Release notes for std version 0.94.0: https://github.com/denoland/deno_std/releases/tag/0.94.0
← Older Version Deno v1.9.0