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---
name: Spawn a child process
---
Use [`Bun.spawn()`](/docs/api/spawn) to spawn a child process.
```ts
const proc = Bun.spawn(["echo", "hello"]);
// await completion
await proc.exited;
```
---
The second argument accepts a configuration object.
```ts
const proc = Bun.spawn("echo", ["Hello, world!"], {
cwd: "/tmp",
env: { FOO: "bar" },
onExit(proc, exitCode, signalCode, error) {
// exit handler
},
});
```
---
By default, the `stdout` of the child process can be consumed as a `ReadableStream` using `proc.stdout`.
```ts
const proc = Bun.spawn(["echo", "hello"]);
const output = await new Response(proc.stdout).text();
output; // => "hello"
```
---
See [Docs > API > Child processes](/docs/api/spawn) for complete documentation.
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