Source URL: https://nextjs.org/docs/app/api-reference/file-conventions

File-system conventions

default.js
- API Reference for the default.js file.
Dynamic Segments
- Dynamic Route Segments can be used to programmatically generate route segments from dynamic data.
error.js
- API reference for the error.js special file.
forbidden.js
- API reference for the forbidden.js special file.
instrumentation.js
- API reference for the instrumentation.js file.
instrumentation-client.js
- Learn how to add client-side instrumentation to track and monitor your Next.js application’s frontend performance.
Intercepting Routes
- Use intercepting routes to load a new route within the current layout while masking the browser URL, useful for advanced routing patterns such as modals.
layout.js
- API reference for the layout.js file.
loading.js
- API reference for the loading.js file.
mdx-components.js
- API reference for the mdx-components.js file.
not-found.js
- API reference for the not-found.js file.
page.js
- API reference for the page.js file.
Parallel Routes
- Simultaneously render one or more pages in the same view that can be navigated independently. A pattern for highly dynamic applications.
proxy.js
- API reference for the proxy.js file.
public
- Next.js allows you to serve static files, like images, in the public directory. You can learn how it works here.
route.js
- API reference for the route.js special file.
Route Groups
- Route Groups can be used to partition your Next.js application into different sections.
Route Segment Config
- Learn about how to configure options for Next.js route segments.
src
- Save pages under the src folder as an alternative to the root pages directory.
template.js
- API Reference for the template.js file.
unauthorized.js
- API reference for the unauthorized.js special file.
Metadata Files
- API documentation for the metadata file conventions.