mirror of
https://github.com/oven-sh/bun
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23 lines
548 B
Markdown
23 lines
548 B
Markdown
---
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name: Hot reload an HTTP server
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---
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Bun supports the [`--hot`](/docs/runtime/hot#hot-mode) flag to run a file with hot reloading enabled. When any module or file changes, Bun re-runs the file.
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```sh
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bun --hot run index.ts
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```
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---
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Bun detects when you are running an HTTP server with `Bun.serve()`. It reloads your fetch handler when source files change, _without_ restarting the `bun` process. This makes hot reloads nearly instantaneous.
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```ts
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Bun.serve({
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port: 3000,
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fetch(req) {
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return new Response(`Hello world`);
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},
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});
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```
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