Impact Score: 5/10
Deno v1.13.1 — 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.
⚡ Executive Summary (TL;DR)
Deno v1.13.1. Source highlight: fix: Blob#slice arguments should be optional (#11665)
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.
⚡ Performance & Enhancements (2)
- perf: improve localStorage throughput (#11709)
- perf(ext/http): faster req_url string assembly (#11711)
🔧 Bug Fixes & Patches (6)
- fix: Blob#slice arguments should be optional (#11665)
- fix: correct spelling of certificate in `--unsafely-ignore-certificate-errors` warning message (#11634)
- fix: don't statically type name on Deno.errors (#11715)
- fix: parse error when transpiling code with BOM (#11688)
- fix(cli): allow specifiers of unknown media types with test command (#11652)
- fix(cli): explicitly scan for ignore attribute in inline tests (#11647)
📄 View Raw Release Notes (Original Developer Log)
- fix: Blob#slice arguments should be optional (#11665)
- fix: correct spelling of certificate in `--unsafely-ignore-certificate-errors` warning message (#11634)
- fix: don't statically type name on Deno.errors (#11715)
- fix: parse error when transpiling code with BOM (#11688)
- fix(cli): allow specifiers of unknown media types with test command (#11652)
- fix(cli): explicitly scan for ignore attribute in inline tests (#11647)
- fix(cli): retain input order of remote specifiers (#11700)
- fix(cli/lint): don't use gray in diagnostics output for visibility (#11702)
- fix(cli/tools/repl): don't highlight candidate when completion is list (#11697)
- fix(ext/crypto): enable non-extractable keys (#11705)
- fix(ext/crypto): fix copying buffersource (#11714)
- fix(ext/crypto): handle idlValue not being present (#11685)
- fix(ext/crypto): importKey() SecurityError on non-extractable keys (#11662)
- fix(ext/crypto): take a copy of keyData bytes (#11666)
- fix(ext/fetch): better error if no content-type
- fix(ext/fetch): don't use global Deno object
- fix(ext/http): remove unwrap() when HTTP conn errors (#11674)
- fix(ext/web): use Array primordials in MessagePort (#11680)
- fix(http/ws): support multiple options in connection header (#11675)
- fix(lint): add links to help at lint.deno.land (#11667)
- fix(test): dispatch load event before tests are run (#11708)
- fix(test): sort file module specifiers (#11656)
- perf: improve localStorage throughput (#11709)
- perf(ext/http): faster req_url string assembly (#11711)
- perf(wpt/crypto): optimize num-bigint-dig for debug builds (#11681)