Cloudflare is bringing the team behind Deno, the JavaScript runtime created by Node.js inventor Ryan Dahl, in house. The move, announced Oct. 9, puts an end date on Deno’s standalone products, and developers who host apps on Deno Deploy now have about six months to move.
Financial terms were not disclosed.
What Happens to Deno’s Products
According to Deno’s own announcement:
- Deno runtime: Supported for another year with monthly releases of bug fixes and security updates. After that, Deno-led development ends. The code stays open source, and others are invited to carry it on.
- Deno Deploy: The hosting service keeps running for six months, then shuts down. Paying customers who move to Cloudflare Workers will get migration help.
- JSR: The JavaScript package registry keeps operating, with its infrastructure moving to Cloudflare.
“We know this is a consequential change for people who have built on Deno,” Dahl wrote.
Why Cloudflare Wants Deno
Cloudflare Workers is a platform for running code on Cloudflare’s global network. In a joint blog post, Dahl and Cloudflare’s Kenton Varda said the goal is to make it far easier to run Workers-style apps on your own servers, not just Cloudflare’s.
The Deno team had already built an open-source, Rust-based project called celld, released in August, that runs Workers and Durable Objects (Cloudflare’s building blocks for stateful apps) on your own hardware. Cloudflare says code and ideas from celld will be merged into workerd, its own open-source runtime, with Dahl and longtime Node.js contributor Bert Belder leading the effort.
Varda also addressed a common criticism of the platform, arguing that Workers’ design is meant to make it better, not to lock customers in.
What Developers Should Do
- If you run apps on Deno Deploy, start planning a move now rather than waiting for the six-month deadline.
- If you use the Deno runtime, you have a year of security fixes, which buys time to evaluate alternatives or community forks.
- If you publish or install packages on JSR, no action is needed for now.
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