Aug 24, 2026· 5 min read
Search Forms Driven by URL Search Params
Drive a search form from URL search params: submit a GET form, read the searchParams prop on the server, and render shareable results.
SearchnextjsForms
Next.js
Full-stack React framework
167 tutorials
12 of 167 tutorials
Aug 24, 2026· 6 min read
Route Handlers in Next.js: `route.js` Explained
How route.js files turn folders in the App Router into API endpoints, which HTTP methods they support, and how the file path becomes the URL.
API RoutesnextjsRoute Handlers
Aug 24, 2026· 6 min read
Handling GET, POST, PUT, PATCH, and DELETE in a Route Handler
How each HTTP method maps to a named export in a Next.js route handler, and what to return for reads, creates, updates, and deletes.
Route HandlersnextjsHTTP Methods
Aug 24, 2026· 6 min read
Reading the Request Body, Query Params, and Headers
How to read JSON, text, and FormData bodies, parse query parameters, and access headers inside a Next.js route handler.
requestnextjsRoute Handlers
Aug 24, 2026· 6 min read
How to Return JSON, Files, Streams, and Redirects from a Route Handler
The response shapes a Next.js route handler can return: JSON with status codes, raw files, streamed content, and redirects.
responsesRoute Handlersnextjs
Aug 24, 2026· 7 min read
How to Read and Set Cookies in Next.js
Read cookies anywhere on the server with the async cookies function, and set or delete them from a Server Action or a Route Handler.
nextjsCookiesRoute Handlers
Aug 24, 2026· 7 min read
Dynamic Route Handlers and Route Params
How to build an API endpoint with a dynamic segment, read the route params promise, and type the context object in the App Router.
nextjsDynamic RoutesRoute Handlers
Aug 24, 2026· 8 min read
Streaming Responses and Server-Sent Events from a Route Handler
Return a ReadableStream from a Route Handler, format it as server-sent events, and consume the updates in the browser with EventSource.
Route HandlersnextjsStreaming
Aug 24, 2026· 8 min read
Handling CORS in Next.js Route Handlers
Set cross-origin headers on a Route Handler, answer preflight requests with an OPTIONS export, and choose between per-route, proxy, and config-wide approaches.
Route Handlersnextjscors
Aug 24, 2026· 8 min read
Receiving Webhooks in Next.js Safely
Build a webhook endpoint as a POST Route Handler, verify the signature against the unchanged body, answer quickly, and handle repeat deliveries.
nextjsRoute Handlerswebhooks
Aug 24, 2026· 8 min read
Rate Limiting a Next.js API Endpoint
Identify the caller, count requests in a window, and return a 429 with Retry-After, first in memory and then with a shared store that survives multiple instances.
Rate LimitingRoute Handlersnextjs
Aug 24, 2026· 8 min read
Using Next.js as a Backend: The Backend-for-Frontend Pattern
When to give your Next.js app its own API layer, which tool to reach for, and the mistakes that come from treating Route Handlers as a general backend.
nextjsArchitectureRoute Handlers