⚠️ Breaking Change
Impact Score: 7/10
Deno v1.1.2 — 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(std/encoding/hex): reorder encode & decode arguments (#6410)
⚡ Executive Summary (TL;DR)
Deno v1.1.2. Source highlight: fix(web/console): Improve string quoting behaviour (#6457)
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 (1)
- - BREAKING(std/encoding/hex): reorder encode & decode arguments (#6410)
✨ New Features & Capabilities (6)
- refactor: Add ability to output compiler performance information (#6434)
- Add Deno.fdatasyncSync and fdatasync (#6403)
- Add Deno.fstatSync and fstat (#6425)
- Add Deno.fsyncSync and fsync (#6411)
- Add Deno.ftruncate and ftruncateSync (#6243)
- feat(std/node): support hex / base64 encoding in Buffer (#6414)
🔧 Bug Fixes & Patches (6)
- fix(web/console): Improve string quoting behaviour (#6457)
- fix(web/url): Support UNC paths on Windows (#6418)
- fix(web/url): Support URLSearchParam as Body (#6416)
- fix: 'Compile' messages changed to 'Check' messages (#6504)
- fix: Panic when process stdio rid is 0 or invalid (#6405)
- fix: enable experimental-wasm-bigint (#6443)
📄 View Raw Release Notes (Original Developer Log)
### 2020.06.26
Changes in the CLI:
- fix(web/console): Improve string quoting behaviour (#6457)
- fix(web/url): Support UNC paths on Windows (#6418)
- fix(web/url): Support URLSearchParam as Body (#6416)
- fix: 'Compile' messages changed to 'Check' messages (#6504)
- fix: Panic when process stdio rid is 0 or invalid (#6405)
- fix: enable experimental-wasm-bigint (#6443)
- fix: ipv6 parsing for --allow-net params (#6453, #6472)
- fix: panic when demanding permissions for hostless URLs (#6500)
- fix: strings shouldn't be interpreted as file URLs (#6412)
- refactor: Add ability to output compiler performance information (#6434)
- refactor: Incremental compilation for TypeScript (#6428, #6489)
- upgrade: rusty_v8 0.4.2 / V8 8.5.216 (#6503)
Changes in unstable APIs:
- Add Deno.fdatasyncSync and fdatasync (#6403)
- Add Deno.fstatSync and fstat (#6425)
- Add Deno.fsyncSync and fsync (#6411)
- Add Deno.ftruncate and ftruncateSync (#6243)
- Remove Deno.dir (#6385)
Changes in std version 0.59.0:
- BREAKING(std/encoding/hex): reorder encode & decode arguments (#6410)
- feat(std/node): support hex / base64 encoding in Buffer (#6414)
- feat(std/wasi): add wasi_snapshot_preview1 (#6441)
- fix(std/io): Make BufWriter/BufWriterSync.flush write all chunks (#6269)
- fix(std/node): fix readFile types, add encoding types (#6451)
- fix(std/node): global process should usable (#6392)
- fix(std/node/process): env, argv exports (#6455)
- fix(std/testing) assertArrayContains should work with any array-like (#6402)
- fix(std/testing): assertThrows gracefully fails if non-Error thrown (#6330)
- refactor(std/testing): Remove unuseful statement (#6486)
- refactor: shift copyBytes and tweak deps to reduce dependencies (#6469)
### Install / Upgrade
**Using Deno:**
```sh
deno upgrade --version 1.1.2
```
**With Shell:**
```sh
curl -fsSL https://deno.land/x/install/install.sh | sh -s v1.1.2
```
**With PowerShell:**
```powershell
$v="1.1.2"; iwr https://deno.land/x/install/install.ps1 -useb | iex
```