Files
bun.sh/docs/guides/write-file/basic.mdx
2025-11-21 14:06:19 -08:00

47 lines
1.1 KiB
Plaintext

---
title: Write a string to a file
sidebarTitle: Write string to file
mode: center
---
This code snippet writes a string to disk at a particular _absolute path_.
It uses the fast [`Bun.write()`](/runtime/file-io#writing-files-bun-write) API to efficiently write data to disk. The first argument is a _destination_; the second is the _data_ to write.
```ts
const path = "/path/to/file.txt";
await Bun.write(path, "Lorem ipsum");
```
---
Any relative paths will be resolved relative to the project root (the nearest directory containing a `package.json` file).
```ts
const path = "./file.txt";
await Bun.write(path, "Lorem ipsum");
```
---
You can pass a `BunFile` as the destination. `Bun.write()` will write the data to its associated path.
```ts
const path = Bun.file("./file.txt");
await Bun.write(path, "Lorem ipsum");
```
---
`Bun.write()` returns the number of bytes written to disk.
```ts
const path = "./file.txt";
const bytes = await Bun.write(path, "Lorem ipsum");
// => 11
```
---
See [Docs > API > File I/O](/runtime/file-io#writing-files-bun-write) for complete documentation of `Bun.write()`.