mirror of
https://github.com/nuxt/nuxt.git
synced 2024-11-11 16:43:55 +00:00
62 lines
3.0 KiB
Markdown
62 lines
3.0 KiB
Markdown
# Server Engine
|
||
|
||
Nuxt 3 is powered by a new server engine, code-named "Nitro".
|
||
|
||
This engine has many benefits:
|
||
::list
|
||
|
||
- Cross-platform support for Node.js, Browsers, service-workers and more.
|
||
- Serverless support out-of-the-box.
|
||
- API routes support.
|
||
- Automatic code-splitting and async-loaded chunks.
|
||
- Hybrid mode for static + serverless sites.
|
||
- Development server with hot module reloading.
|
||
::
|
||
|
||
## API Layer
|
||
|
||
Server [API endpoints](/guide/directory-structure/server#api-routes) and [Middleware](/guide/directory-structure/server#server-middleware) are added by Nitro that internally uses [h3](https://github.com/unjs/h3).
|
||
|
||
Key features include:
|
||
|
||
- Handlers can directly return objects/arrays for an automatically-handled JSON response
|
||
- Handlers can return promises, which will be awaited (`res.end()` and `next()` are also supported)
|
||
- Helper functions for body parsing, cookie handling, redirects, headers and more
|
||
|
||
Check out [the h3 docs](https://github.com/unjs/h3) for more information.
|
||
|
||
::alert{type="info" icon=ℹ️}
|
||
Learn more about the API layer in the [`server/`](/guide/directory-structure/server) directory.
|
||
::
|
||
|
||
## Direct API calls
|
||
|
||
Nitro allows 'direct' calling of routes via the globally-available `$fetch` helper. This will make an API call to the server if run on the browser, but will directly call the relevant function if run on the server, **saving an additional API call**.
|
||
|
||
`$fetch` API is using [ohmyfetch](https://github.com/unjs/ohmyfetch), with key features including:
|
||
|
||
- Automatic parsing of JSON responses (with access to raw response if needed)
|
||
- Request body and params are automatically handled, with correct `Content-Type` headers
|
||
|
||
For more information on `$fetch` features, check out [ohmyfetch](https://github.com/unjs/ohmyfetch).
|
||
|
||
## Typed API routes
|
||
|
||
When using API routes (or middleware), Nitro will generate typings for these routes as long as you are returning a value instead of using `res.end()` to send a response.
|
||
|
||
You can access these types when using `$fetch()` or `useFetch()`.
|
||
|
||
## Standalone Server
|
||
|
||
Nitro produces a standalone server dist that is independent of `node_modules`.
|
||
|
||
The server in Nuxt 2 is not standalone and requires part of Nuxt core to be involved by running `nuxt start` (with the [`nuxt-start`](https://www.npmjs.com/package/nuxt-start) or [`nuxt`](https://www.npmjs.com/package/nuxt) distributions) or custom programmatic usage, which is fragile and prone to breakage and not suitable for serverless and service-worker environments.
|
||
|
||
Nuxt 3 generates this dist when running `nuxt build` into a [`.output`](/guide/directory-structure/output) directory.
|
||
|
||
The output contains runtime code to run your Nuxt server in any environment (including experimental browser service workers!) and serve your static files, making it a true hybrid framework for the JAMstack. In addition, Nuxt implements a native storage layer, supporting multi-source drivers and local assets.
|
||
|
||
::alert{type="info" icon=IconCode}
|
||
Check out the Nitro engine on GitHub: [unjs/nitro](https://github.com/unjs/nitro).
|
||
::
|