Impact Score: 5/10
Deno v1.4.2 — 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.
⚡ Executive Summary (TL;DR)
Deno v1.4.2. Source highlight: fix: Better formatting in console (#7642, #7641, #7553)
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 (2)
- example(core): Add hello world example (#7611)
- feat(std/node): implement getSystemErrorName() (#7624)
🔧 Bug Fixes & Patches (6)
- fix: Better formatting in console (#7642, #7641, #7553)
- fix: Change log level to which prefix added (#7582)
- fix: Change the Console class declaration to an interface (#7646)
- fix: Clearing timers race condition (#7617)
- fix: customInspect works on functions (#7670)
- fix: Ignore fileExists in tsc host (#7635)
📄 View Raw Release Notes (Original Developer Log)
### 1.4.2 / 2020.09.25
- fix: Better formatting in console (#7642, #7641, #7553)
- fix: Change log level to which prefix added (#7582)
- fix: Change the Console class declaration to an interface (#7646)
- fix: Clearing timers race condition (#7617)
- fix: customInspect works on functions (#7670)
- fix: Ignore fileExists in tsc host (#7635)
- fix: Make --unstable a global flag (#7585)
- fix: Make --watch and --inspect conflicting args (#7610)
- fix: Make some web API constructors illegal at runtime (#7468)
- fix: Replaced legacy chrome-devtools:// scheme. (#7659)
- fix: Response.arrayBuffer() doesn't return promise (#7618)
- fix: Update supported text encodings (#7668)
- fix: Use class instead of var+interface in d.ts #7514
- fix(coverage): print lines with no coverage to stdout (#7640)
- fix(fmt,lint): do not print number of checked files when `--quiet` is enabled
(#7579)
- fix(info): add --importmap flag (#7424)
- fix(installer): Don't reload by default (#7596)
- fix(repl): interpret object literals as expressions (#7591)
- fix(watch): watch importmap file for changes (#7580)
- refactor(core): support error stack, remove js_check (#7629, #7636)
- refactor(coverage): Harden coverage collection (#7584, #7616, #7577)
- upgrade: TypeScript to 4.0.3 (#7637)
- example(core): Add hello world example (#7611)
Changes in std version 0.71.0:
- feat(std/node): implement getSystemErrorName() (#7624)
- fix(std/datetime): 12 and 24 support (#7661)
- fix(std/fs): mark createWalkEntry(Sync) as internal (#7643)
- chore(std/hash): update crates (#7631)