bun.sh/docs/guides/write-file/blob.md

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Write a Blob to a file

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");

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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);

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See Docs > API > File I/O for complete documentation of Bun.write().