Express starter

The code

Two files, exactly what you get in the editor.

import express from 'express'

type Todo = { id: number; title: string; done: boolean }

const app = express()
app.use(express.json())

let nextId = 3
const todos: Todo[] = [
  { id: 1, title: 'Write an API', done: true },
  { id: 2, title: 'Deploy it with jsdrop', done: false },
]

app.get('/', (_req, res) => {
  res.type('html').send(`<h1>Todo API</h1>
<p>Try <a href="/todos">GET /todos</a>, or POST JSON like {"title": "Buy milk"} to /todos.</p>`)
})

app.get('/todos', (_req, res) => res.json(todos))

app.post('/todos', (req, res) => {
  const title = String(req.body?.title ?? '').trim()
  if (!title) return res.status(400).json({ error: 'A title is required.' })
  const todo = { id: nextId++, title, done: false }
  todos.push(todo)
  res.status(201).json(todo)
})

app.delete('/todos/:id', (req, res) => {
  const index = todos.findIndex((todo) => todo.id === Number(req.params.id))
  if (index < 0) return res.status(404).json({ error: 'Not found.' })
  res.json(todos.splice(index, 1)[0])
})

const port = Number(process.env.PORT) || 3000
app.listen(port, () => console.log(`Todo API on port ${port}`))

{
  "name": "express-api",
  "private": true,
  "type": "module",
  "dependencies": {
    "express": "^5.1.0"
  }
}