Creating an API Route

  • Location: API routes reside in a dedicated folder named pages/api. Any file placed inside this folder is treated as an API endpoint.
  • File Naming: The file name determines the URL path for accessing the API route. For example, a file named hello.js at pages/api/hello.js would be accessible at /api/hello.
  • Function Structure: Each API route file should export a default function that takes two arguments:
  • req: This is an instance of http.IncomingMessage object containing information about the incoming HTTP request (headers, body, etc.).
  • res: This is an instance of http.ServerResponse object used to send the response back to the client (including status code, headers, and response data).
JavaScript
// api/routs.js
import { NextResponse  } from "next/server";
export async function GET() {
    return NextResponse.json({
        hello:"Geeks For Geeks",
    })
}

In this example, visiting `/api/users/123` in your Next.js application will trigger this API route, and it will respond with a JSON object containing the user data for ID 123.

How to use Next.js API Routes?

Next.js API Routes are a feature of Next.js that allows you to create server-side logic and APIs within your Next.js application. These API routes are implemented using files in the `pages/api` directory of your Next.js project. When you deploy your Next.js application, these API routes are automatically served as serverless functions.

Table of Content

  • Key points about Next.js API Routes
  • Dynamic API Routes
  • Creating an API Route
  • API Routes custom configuration
  • Typing API Routes with TypeScript
  • Accessing an API Route
  • Conclusion

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Key points about Next.js API Routes

File Structure: API routes are defined in individual files inside the `pages/api` directory. Each file represents a different API endpoint.Automatic Serverless Functions: Next.js automatically converts these API route files into serverless functions, meaning you don’t need to set up a separate server to handle API requests.HTTP Methods: You can define API routes for different HTTP methods like GET, POST, PUT, DELETE, etc., by creating files with corresponding names (`get.js`, `post.js`, `put.js`, etc.) inside the `pages/api` directory.Request Handling: Inside each API route file, you can write server-side code to handle incoming HTTP requests, process data, interact with databases or external APIs, and send back responses.Routing: Next.js API Routes follow a simple routing structure based on file names. For example, a `pages/api/users.js` file will create an API endpoint at `/api/users`.Server-Side Rendering: Since API routes run on the server side, they can access server-only functionalities and databases, making them suitable for server-side rendering (SSR) and handling sensitive operations securely....

Dynamic API Routes

Dynamic API routes in Next.js allow you to create flexible endpoints that handle dynamic parameters in the URL. This is useful for building APIs that require variable data, such as fetching specific resources based on IDs or filtering data based on query parameters. Here’s how you can create dynamic API routes in Next.js:...

Creating an API Route

Location: API routes reside in a dedicated folder named pages/api. Any file placed inside this folder is treated as an API endpoint.File Naming: The file name determines the URL path for accessing the API route. For example, a file named hello.js at pages/api/hello.js would be accessible at /api/hello.Function Structure: Each API route file should export a default function that takes two arguments:req: This is an instance of http.IncomingMessage object containing information about the incoming HTTP request (headers, body, etc.).res: This is an instance of http.ServerResponse object used to send the response back to the client (including status code, headers, and response data)....

API Routes Custom Configuration

1. Custom Route Paths:...

Typing API Routes with TypeScript

When typing API Routes with TypeScript in Next.js, you can ensure type safety by defining types for request and response objects as well as for response data. Here’s how you can do it:...

Accessing an API Route

You can access an API route from your frontend code (React components) using techniques like fetch or libraries like Axios. Here’s an example using fetch:...

Conclusion

In this article, we’ve looked at setting up an API route in Next.js. Next.js simplifies the process of implementing an API for your applications. It offers a couple of advantages: it does not require configuration, isolates every handler as a standalone function, has great middleware support, etc....