[Fixed] What is the right way to throw an error message in NextJS 13.4 API? (Response, NextAPIResponse, NextResponse) – Reactjs

The Problem:

In the latest version of NextJS 13.4, the syntax for throwing error messages in API routes has changed. The previously used response.status(500).json({ error: 'Error Message' }) syntax is no longer valid. This change in syntax can cause confusion and errors for developers who are upgrading to NextJS 13.4 or using app routing instead of page routing. The objective is to determine the correct approach for throwing error messages in the updated NextJS architecture for both app routing and page routing scenarios.

The Solutions:

Solution 1: Use NextResponse.json() to throw error messages in NextJS 13.4 API

NextJS 13.4 has introduced a new way to throw error messages in APIs. The old method using `response.status()` and `json()` no longer works. The correct way to do it now is to use `NextResponse.json()`.

Here’s an example in Typescript:

import { NextResponse } from 'next/server';

export async function GET(request: Request) {
  return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 })
}

And here’s an example in Javascript:

import { NextResponse } from 'next/server';

export async function GET(request) {
  return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 })
}

Note that you can use either `error` or `statusText` as the key in the JSON object. Both will work fine.

Video Explanation:

The following video, titled "Next.js Middleware & Cors | Nextjs 13 tutorial - YouTube", provides additional insights and in-depth exploration related to the topics discussed in this post.

Web Dev Roadmap for Beginners (Free!): https://bit.ly/DaveGrayWebDevRoadmap Learn how to apply Next.js middleware in Nextjs 13.