⚠️ Breaking Change
Impact Score: 7/10
Deno v0.36.0 — 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.
Breaking-change evidence from the source
- BREAKING CHANGE: Remove Deno.errors.Other (#4249)
- BREAKING CHANGE: Rename readDir -> readdir (#4225)
⚡ Executive Summary (TL;DR)
Deno v0.36.0. Source highlight: BREAKING CHANGE: Remove Deno.errors.Other (#4249)
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.
⚠️ Breaking Changes & Deprecations (2)
- - BREAKING CHANGE: Remove Deno.errors.Other (#4249)
- - BREAKING CHANGE: Rename readDir -> readdir (#4225)
✨ New Features & Capabilities (6)
- feat(std/encoding): add binary module (#4274)
- feat(std/node): add appendFile and appendFileSync (#4294)
- feat(std/node): add directory classes (#4087)
- feat(std/node): add os.tmpdir() implementation (#4213)
- feat: Add Deno.umask (#4290)
- feat: Add global --quiet flag (#4135)
⚡ Performance & Enhancements (2)
- perf: use Object instead of Map for promise table (#4309)
- refactor(core): improve exception handling(#4214, #4214, #4198)
🔧 Bug Fixes & Patches (6)
- fix: Add content type for wasm, fix encoding in wasm test fixture (#4269)
- fix: Add waker to StreamResource to fix hang on close bugs (#4293)
- fix: Flattens dispatch error handling to produce one less useless stack frame on op errors. (#4189)
- fix: JavaScript dependencies in bundles. (#4215)
- fix: Stricter permissions for Deno.makeTemp (#4318)
- fix: `deno install` file name including extra dot on Windows (#4243)
📄 View Raw Release Notes (Original Developer Log)
### Changes
- BREAKING CHANGE: Remove Deno.errors.Other (#4249)
- BREAKING CHANGE: Rename readDir -> readdir (#4225)
- feat(std/encoding): add binary module (#4274)
- feat(std/node): add appendFile and appendFileSync (#4294)
- feat(std/node): add directory classes (#4087)
- feat(std/node): add os.tmpdir() implementation (#4213)
- feat: Add Deno.umask (#4290)
- feat: Add global --quiet flag (#4135)
- feat: Improvements to std/flags. (#4279)
- feat: Make internel error frames dimmer (#4201)
- feat: Support async function and EventListenerObject as listeners (#4240)
- feat: add actual error class to fail message (#4305)
- feat: seek should return cursor position (#4211)
- feat: support permission mode in mkdir (#4286)
- feat: update metrics to track different op types (#4221)
- fix: Add content type for wasm, fix encoding in wasm test fixture (#4269)
- fix: Add waker to StreamResource to fix hang on close bugs (#4293)
- fix: Flattens dispatch error handling to produce one less useless stack frame on op errors. (#4189)
- fix: JavaScript dependencies in bundles. (#4215)
- fix: Stricter permissions for Deno.makeTemp (#4318)
- fix: `deno install` file name including extra dot on Windows (#4243)
- fix: inlining of lib.dom.iterable.d.ts. (#4242)
- fix: properly close FsEventsResource (#4266)
- fix: remove unwanted ANSI Reset Sequence (#4268)
- perf: use Object instead of Map for promise table (#4309)
- perf: use subarray instead of slice in dispatch minimal (#4180)
- refactor(cli/js): add assertOps and assertResources sanitizer in cli/js/ unit tests (#4209, #4161)
- refactor(cli/js/net): Cleanup iterable APIs (#4236)
- refactor(core): improve exception handling(#4214, #4214, #4198)
- refactor(core): rename structures related to Modules (#4217)
- refactor: Cleanup options object parameters (#4296)
- refactor: Migrate internal bundles to System (#4233)
- refactor: Rename Option -> Options (#4226)
- refactor: cleanup compiler runtimes (#4230)
- refactor: preliminary cleanup of Deno.runTests() (#4237)
- refactor: reduce unnecesarry output in cli/js tests (#4182)
- refactor: reorganize cli/js (#4317, #4316, #4310, #4250, #4302, #4283, #4264)
- refactor: rewrite testPerm into unitTest (#4231)
- refactor: uncomment tests broken tests, use skip (#4311)
- upgrade: dprint 0.8.0 (#4308, #4314)
- upgrade: rust dependencies (#4270)
- upgrade: typescript 3.8.3 (#4301)
### Install / Upgrade
**With Shell:**
```sh
curl -fsSL https://deno.land/x/install/install.sh | sh -s v0.36.0
```
**With PowerShell:**
```powershell
iwr https://deno.land/x/install/install.ps1 -useb -outf install.ps1; .\install.ps1 v0.36.0
```