Guide on how to retrieve a response from an API Route and integrate it into the client side of the app router within Next.js

Question

Guide on how to retrieve a response from an API Route and integrate it into the client side of the app router within Next.js

Transitioning from Next.js 12 to 13 has been quite perplexing, especially when it comes to handling JSON data. Every time I attempt a fetch request, I find myself needing to refer back to documentation due to the confusion surrounding JSON. Is there anyone out there who can assist me in clearing up this issue once and for all?

Here is an example of how I make a fetch POST request to the API handler:

//client component
const res = await fetch('/api/dostuff', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({dataObj: {hey: "ho"})
    })
//I NEED HELP IN RECEIVING THE RESPONSE

And here is how I attempt to process the response:

//route.js in api/dostuff/
export async function POST(request) {

  const { dataObj } = await request.json()

  //CAN SOMEONE HELP ME WITH RETURNING THIS
  
}

I have experimented with various ways of handling JSON data, including JSON.stringify, JSON.parse, and json(), but none seem to be effective. It is frustrating to encounter such complexity after not having to deal with these issues in Next.js 12.

javascript next.js

Answer 1

Answer №1

When sending a response, you have the option to return plain text using the Response constructor:

// api/route.js

export async function POST(request) {
  return new Response("Hello, Next.js!", {
    status: 200,
  });
}

Alternatively, you can return JSON by utilizing NextResponse from the "next/server" module:

// api/route.js

import { NextResponse } from "next/server";

export async function POST(request) {
  return NextResponse.json({ message: "Success" });
}

To handle the response on the client side, follow these steps:

const res = await fetch("/api/dostuff", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
  },
  body: JSON.stringify({ dataObj: { hey: "ho" } }),
});
// If returning plain text:
const data = await res.text();
// If returning JSON:
const data = await res.json();

For more detailed information, refer to Route Handlers documentation.

Answer 2

When sending a response, you have the option to return plain text using the Response constructor:

// api/route.js

export async function POST(request) {
  return new Response("Hello, Next.js!", {
    status: 200,
  });
}

Alternatively, you can return JSON by utilizing NextResponse from the "next/server" module:

// api/route.js

import { NextResponse } from "next/server";

export async function POST(request) {
  return NextResponse.json({ message: "Success" });
}

To handle the response on the client side, follow these steps:

const res = await fetch("/api/dostuff", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
  },
  body: JSON.stringify({ dataObj: { hey: "ho" } }),
});
// If returning plain text:
const data = await res.text();
// If returning JSON:
const data = await res.json();

For more detailed information, refer to Route Handlers documentation.

Guide on how to retrieve a response from an API Route and integrate it into the client side of the app router within Next.js

Answer №1

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