Docs: Bun runtime support #55272

zigang93 · 2023-09-11T12:53:13Z

zigang93
Sep 11, 2023

What is the improvement or update you wish to see?

bun is officially 1.0 and production ready.. I am looking forward to replace all test suit, package manager and runtime in bun.

I know that it may sound awkward to vercel teams that are working at turbopack.. but clearly bun is moving to good direction for js ecosystem

Is there any context that might help us understand?

any possible to run bun runtime?

Does the docs page already exist? Please link to it.

No response

panzacoder · 2023-09-11T15:00:05Z

panzacoder
Sep 11, 2023

I have no expectations of immediate support, but I would definitely like to hear Vercel's take/stance, or even just to know if they have planned a timeframe to spike on bun support in the near future.

Thanks for opening the ticket!

0 replies

wwwdepot · 2023-09-11T18:18:58Z

wwwdepot
Sep 11, 2023

You can use Next.js with Bun, see PRs #53467 #53590.

Using Bun runtime on Vecel, not yet, see https://github.com/orgs/vercel/discussions/2021#discussioncomment-6967946

0 replies

panzacoder · 2023-09-11T19:08:32Z

panzacoder
Sep 11, 2023

Well, kinda. According to Bun documentation, Bun can be used as a package manager, but Next uses Node APIs that are not compatible with Bun at the moment (annoyingly, there is no link to discussion around which APIs are blocking).

Next.js currently relies on Node.js APIs that Bun does not yet implement. The guide below uses Bun to initialize a project and install dependencies, but it uses Node.js to run the dev server.
Source: Bun guide for Next.js

For me at least, there is little point in adopting bun if it doesn't replace all the relevant tooling. Even if there are edges, runtime support is the one that really matters for the majority of the benefits.

0 replies

wwwdepot · 2023-09-11T20:27:01Z

wwwdepot
Sep 11, 2023

Tried example app-dir-i18n-routing in my Ubuntu VM. Didn't encounter any error.

rm -rf yarn.lock node_modules

bun install

bun run build

bun run start

2 replies

andrewslock Mar 29, 2024

You probably didnt get any error because the command bun run uses nodejs by default (https://bun.sh/docs/cli/run#bun). If you want to run it using the bun runtime you need to set the --bun flag. So instead you should've tried bun run --bun build and bun run --bun start

vincerubinetti Jul 5, 2024

Oh wow I had no idea this was a thing. I've been using Bun on several projects over the last few months, and it's been working great, but I wonder if I've actually still been running most things in Node because I have both Bun and Node installed.

zigang93 · 2023-09-11T21:30:02Z

zigang93
Sep 11, 2023
Author

You can use Next.js with Bun, see PRs #53467 #53590.

Using Bun runtime on Vecel, not yet, see https://github.com/orgs/vercel/discussions/2021#discussioncomment-6967946

Well, I am using docker in nextjs..
there are same issue that been reported in oven-sh/bun#4795 ..

0 replies

christophstach · 2023-09-13T16:22:08Z

christophstach
Sep 13, 2023

I tried using bun with Next.js. Had no problem installing it, but I had to install the types manually. It wasn't installed automatically by the bunx create-next-app so I had to bun install -d bun-types. Also, I realized that I was not able to get the import working. I am always getting the following error:

import Database from 'bun:sqlite'

const db = new Database("bun.db")

bun:sqlite
Module build failed: UnhandledSchemeError: Reading from "bun:sqlite" is not handled by plugins (Unhandled scheme).
Webpack supports "data:" and "file:" URIs by default.
You may need an additional plugin to handle "bun:" URIs.

Any news on that or how to solve it?

1 reply

ecumene Dec 7, 2023

oven-sh/bun#4350 (comment)

fungilation · 2023-09-14T04:05:11Z

fungilation
Sep 14, 2023

I'm tracking esbuild related issue (not running postinstall) in oven-sh/bun#5148, which is blocking Vercel deploy of my app

0 replies

RobSchilderr · 2023-09-20T15:51:40Z

RobSchilderr
Sep 20, 2023

I still had these errors when trying to run my Turborepo starter project with Bun. If you go to the bun branch of that repo, you can see my changes and what I tried to achieve.

er.development.js:6141:7)
next-web:build: Error: <Html> should not be imported outside of pages/_document.
next-web:build: Read more: https://nextjs.org/docs/messages/no-document-import-in-page

and

next-web:build: Error occurred prerendering page "/". Read more: https://nextjs.org/docs/messages/prerender-error
next-web:build: Error: NextRouter was not mounted. https://nextjs.org/docs/messages/next-router-not-mounted

Steps to reproduce:

1. Initial Setup:
No package manager was set initially. Ran: npx @turbo/codemod add-package-manager and then yarn global add @turbo/codemod. This added a packageManager field to package.json.

2. Switching to Bun:
Updated package.json with: "packageManager": "[email protected]". Encountered a type error: String does not match the pattern of "(npm|pnpm|yarn)@\d+\.\d+\.\d+(-.+)?". This comes from the IDE so we can safely ignore for now.

3. Cleaning Up:
Removed node_modules, Ran bun install. Deleted yarn.lock and now have a bun.lockb.

4. Building with Bun:
Instead of yarn build, used bun run turbo build. Note: There's a difference in command syntax which caused a brief confusion.

5. Result:
The errors as shown above.

1 reply

shaneosullivan Apr 16, 2024

Is there any update here? Presumably any resolution is reliant on Bun becoming more compatible with Node so that it "just works", is there any record of ongoing work or issues tracking this?

Christophvh · 2025-02-13T15:25:05Z

Christophvh
Feb 13, 2025

Was wondering if someone from Vercel ever addressed this? Bun is currently much more mature, getting close to 100% NodeJS compatibility.

0 replies

Plopix · 2025-02-22T01:46:54Z

Plopix
Feb 22, 2025

I would love to see Bun Runtime directly on Vercel!

0 replies

PrinOrange · 2025-03-14T03:56:27Z

PrinOrange
Mar 14, 2025

I think it's time to add Bun support as now.
Bun has better performance and less memory using that cuts down over 70%, with good compatibility.

0 replies

tjazsilovsek · 2025-04-23T11:36:11Z

tjazsilovsek
Apr 23, 2025

What is the status here?

0 replies

nicholasoxford · 2025-04-23T17:02:15Z

nicholasoxford
Apr 23, 2025

Would love to see this 🙏

0 replies

shahbazshueb · 2025-05-13T06:39:01Z

shahbazshueb
May 13, 2025

Would love to see this 🙏 (1)

0 replies

johnny-woodtke · 2025-05-23T13:45:04Z

johnny-woodtke
May 23, 2025

I built a custom Bun runtime for Vercel serverless functions here: https://github.com/johnny-woodtke/vercel-bun

All it requires is a few lines in your project's vercel.json, and it will integrate perfectly with Vercel's GitHub webhook deployments alongside a Next.js app.

Example deployment here: https://vercel-bun-nine.vercel.app

/api: https://vercel-bun-nine.vercel.app/api
/api/hello: https://vercel-bun-nine.vercel.app/api/hello?firstName=Johnny&lastName=Woodtke

0 replies

Docs: Bun runtime support #55272

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What is the improvement or update you wish to see?

Is there any context that might help us understand?

Does the docs page already exist? Please link to it.

Replies: 15 comments · 4 replies

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zigang93 Sep 11, 2023 Author

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Replies: 15 comments 4 replies

zigang93
Sep 11, 2023
Author