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Bun bun-v0.0.41stable Released Oct 30, 2021
Impact Score: 5/10

Bun v0.0.41

Source available — automated, not human-reviewed

Component: bun · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes
📄 .MD
⚡ Improvements 1 🔧 Bug Fixes 2
⚡ Executive Summary (TL;DR)

Bun bun-v0.0.41. Source highlight: `bun run ./file.js` now supports running JavaScript, TS, TSX, and JSX files using Bun.js. If you pass `bun run` a filepath to a `.js`, `.jsx`, `.tsx`, or `.ts` file, it will run it with Bun.js instead of saying `"error: Missing script"`. This is very experimental!

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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 (1)

  • `performance.now()` is implemented

🔧 Bug Fixes & Patches (2)

  • [.env loader] functions from bash were exported incorrectly due to parsing process environment variables similarly to `.env` files which is unnecessary. Now process environment variables are passed through without extra parsing
  • `fetch()` wasn't working due to a silly mistake. That's fixed
📄 View Raw Release Notes (Original Developer Log)
To upgrade: ```bash bun upgrade ``` ### What's new: `bun run`: `bun run ./file.js` now supports running JavaScript, TS, TSX, and JSX files using Bun.js. If you pass `bun run` a filepath to a `.js`, `.jsx`, `.tsx`, or `.ts` file, it will run it with Bun.js instead of saying `"error: Missing script"`. This is very experimental! #### Bun.js <sup>Bun.js is Bun's JavaScript runtime environment. </sup> - Top-level await works now - `performance.now()` is implemented ### Bug fixes - [.env loader] functions from bash were exported incorrectly due to parsing process environment variables similarly to `.env` files which is unnecessary. Now process environment variables are passed through without extra parsing - `fetch()` wasn't working due to a silly mistake. That's fixed
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