Impact Score: 5/10
Deno v1.0.1 — 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 v1.0.1. Source highlight: fix(doc): crash on formatting type predicate (#5651)
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(std/bytes): add hasSuffix and contains functions, update docs (#4801)
- feat(std/fmt): rgb24 and bgRgb24 can use numbers for color (#5198)
- feat(std/hash): add fnv implementation (#5403)
- feat(std/node) Export TextDecoder and TextEncoder from util (#5663)
- feat(std/node): Add fs.promises.readFile (#5656)
- feat(std/node): add util.callbackify (#5415)
🔧 Bug Fixes & Patches (6)
- fix(doc): crash on formatting type predicate (#5651)
- fix: Implement Deno.kill for windows (#5347)
- fix: Implement Deno.symlink() for windows (#5533)
- fix: Make Deno.remove() work with directory symlinks on windows (#5488)
- fix: Mark Deno.pid and Deno.noColor as const (#5593)
- fix: Remove debug prints introduced in e18aaf49c (#5356)
📄 View Raw Release Notes (Original Developer Log)
### Changes
Changes in the CLI:
- fix(doc): crash on formatting type predicate (#5651)
- fix: Implement Deno.kill for windows (#5347)
- fix: Implement Deno.symlink() for windows (#5533)
- fix: Make Deno.remove() work with directory symlinks on windows (#5488)
- fix: Mark Deno.pid and Deno.noColor as const (#5593)
- fix: Remove debug prints introduced in e18aaf49c (#5356)
- fix: Return error if more than one listener calls `WorkerHandle::get_event()` (#5461)
- fix: Simplify fmt::Display for ModuleResolutionError (#5550)
- fix: URL utf8 encoding (#5557)
- fix: don't panic on Deno.close invalid argument (#5320)
- fix: panic if DENO_DIR is a relative path (#5375)
- fix: setTimeout and friends have too strict types (#5412)
- refactor: rewrite TS dependency analysis in Rust (#5029, #5603)
- update: dprint 0.18.4 (#5671)
Changes in std version 0.52.0:
- feat(std/bytes): add hasSuffix and contains functions, update docs (#4801)
- feat(std/fmt): rgb24 and bgRgb24 can use numbers for color (#5198)
- feat(std/hash): add fnv implementation (#5403)
- feat(std/node) Export TextDecoder and TextEncoder from util (#5663)
- feat(std/node): Add fs.promises.readFile (#5656)
- feat(std/node): add util.callbackify (#5415)
- feat(std/node): first pass at url module (#4700)
- feat(std/node): fs.writeFileSync polyfill (#5414)
- fix(std/hash): SHA1 hash of Uint8Array (#5086)
- fix(std/http): Add .css to the MEDIA_TYPES. (#5367)
- fix(std/io): BufReader should not share the internal buffer across reads (#4543)
- fix(std/log): await default logger setup (#5341)
- fix(std/node) improve fs.close compatibility (#5649)
- fix(std/node): fs.readFile should take string as option (#5316)
- fix(std/testing): Provide message and diff for assertStrictEq (#5417)
### Install / Upgrade
**Using Deno:**
```sh
deno upgrade --version 1.0.1
```
**With Shell:**
```sh
curl -fsSL https://deno.land/x/install/install.sh | sh -s v1.0.1
```
**With PowerShell:**
```powershell
iwr https://deno.land/x/install/install.ps1 -useb -outf install.ps1; .\install.ps1 v1.0.1
```