skills/bun-guides-write-file-blob/SKILL.md
Write a Blob to a file
npx skillsauth add jarle/bun-skills Bun Write a Blob to a fileInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
This code snippet writes a Blob to disk at a particular path.
It uses the fast Bun.write() API to efficiently write data to disk. The first argument is a destination, like an absolute path or BunFile instance. The second argument is the data to write.
const path = "/path/to/file.txt";
await Bun.write(path, "Lorem ipsum");
The BunFile class extends Blob, so you can pass a BunFile directly into Bun.write() as well.
const path = "./out.txt";
const data = Bun.file("./in.txt");
// write the contents of ./in.txt to ./out.txt
await Bun.write(path, data);
See Docs > API > File I/O for complete documentation of Bun.write().
development
Using TypeScript with Bun, including type definitions and compiler options
development
Learn how to write tests using Bun's Jest-compatible API with support for async tests, timeouts, and various test modifiers
testing
Learn how to use snapshot testing in Bun to save and compare output between test runs
testing
Learn about Bun test's runtime integration, environment variables, timeouts, and error handling