Next.js API Route Handler

1import type { NextApiRequest, NextApiResponse } from 'next';
2 
3type User = {
4  id: number;
5  name: string;
6  email: string;
7};
8 
9type ErrorResponse = {
10  error: string;
11};
12 
13export default async function handler(
14  req: NextApiRequest,
15  res: NextApiResponse<User | User[] | ErrorResponse>
16) {
17  if (req.method === 'GET') {
18    const users: User[] = [
19      { id: 1, name: 'Alice', email: 'alice@example.com' },
20      { id: 2, name: 'Bob', email: 'bob@example.com' }
21    ];
22    return res.status(200).json(users);
23  }
24 
25  if (req.method === 'POST') {
26    const { name, email } = req.body;
27    const user: User = { id: Date.now(), name, email };
28    return res.status(201).json(user);
29  }
30 
31  return res.status(405).json({ error: 'Method not allowed' });
32}