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Sync alternative to `fs.openAsBlob`

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#65,462 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
35/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Active
Tech stack
javascript
Domain
backend

Research direction

Start by reviewing the existing fs.openAsBlob and fs.createReadStream APIs and their documentation. Clarify the synchronous File API shape, metadata exposed to Response, and cross-runtime behavior before proposing an entry point. Done means the API design is agreed and its behavior is covered by tests and documentation.

Written by the indexing model from the issue text.

Description

feature request
What is the problem this feature will solve?

I'm making a cross-runtime file streaming library (that needs to be fast) and this would make it way easier to do so since Bun.file() is already sync.

So the code might look like this if my suggestion made it to node:fs:

const getFile: (path: string) => File = globalThis.Bun
  ? Bun.file
  : process.getBuiltinModule('fs').openAsWebFile;

// Usage
return new Response(getFile('./index.html'));
return new Response(getFile('./binary-data').slice(0, 100));
What is the feature you are proposing to solve the problem?

A new API, something like fs.openAsWebFile() that returns a File maybe?
It would have more info for the Response constructor to pick up as well.

What alternatives have you considered?

fs.createReadStream but that is also async and can be slower too.

Dominant language
JavaScript
Stars
122k
Forks
37.4k
Avg merge
4d 4h
Merged PRs (30d)
276

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