Impact Score: 5/10
Bun v1.2.21
Source available — automated, not human-reviewed
Component: bun · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
⚡ Executive Summary (TL;DR)
Bun bun-v1.2.21. Source highlight: To install Bun v1.2.21
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.
📄 View Raw Release Notes (Original Developer Log)
To install Bun v1.2.21
```bash
curl -fsSL https://bun.sh/install | bash
# or you can use npm
# npm install -g bun
```
Windows:
```bash
powershell -c "irm bun.sh/install.ps1|iex"
```
To upgrade to Bun v1.2.21:
```bash
bun upgrade
```
### [Read Bun v1.2.21's release notes on Bun's blog](https://bun.sh/blog/bun-v1.2.21)
### Thanks to 23 contributors!
- [@alii](https://github.com/alii)
- [@cirospaciari](https://github.com/cirospaciari)
- [@connerlphillippi](https://github.com/connerlphillippi)
- [@creationix](https://github.com/creationix)
- [@dylan-conway](https://github.com/dylan-conway)
- [@heimskr](https://github.com/heimskr)
- [@imranbarbhuiya](https://github.com/imranbarbhuiya)
- [@jarred-sumner](https://github.com/jarred-sumner)
- [@jarred-sumner-bot](https://github.com/jarred-sumner-bot)
- [@lifefloating](https://github.com/lifefloating)
- [@lydiahallie](https://github.com/lydiahallie)
- [@markovejnovic](https://github.com/markovejnovic)
- [@nektro](https://github.com/nektro)
- [@pfgithub](https://github.com/pfgithub)
- [@riskymh](https://github.com/riskymh)
- [@rmncldyo](https://github.com/rmncldyo)
- [@robobun](https://github.com/robobun)
- [@sanderjo](https://github.com/sanderjo)
- [@someone19204](https://github.com/someone19204)
- [@sosukesuzuki](https://github.com/sosukesuzuki)
- [@taylordotfish](https://github.com/taylordotfish)
- [@zackradisic](https://github.com/zackradisic)
- [@zenazn](https://github.com/zenazn)