Pengendali penghala, penaipan Request/Response

import express, { Request, Response } from "express"

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

app.get("/", (_req: Request, res: Response) => {
  res.type("text/plain").send("OK")
})

app.listen(3000, () => console.log("http://localhost:3000"))

import { Request, Response } from "express"

type Params = { id: string }
 type Query = { verbose?: "1" | "0" }
 type ResBody = { id: string; name: string; details?: string }

export function getUser(req: Request<Params, ResBody, unknown, Query>, res: Response<ResBody>) {
  const { id } = req.params
  const { verbose } = req.query
  const body: ResBody = { id, name: "Ada", details: verbose === "1" ? "Loves math" : undefined }
  return res.status(200).json(body)
}

import { Request, Response } from "express"

type CreateUserBody = { name: string }
 type CreateUserRes = { id: string; name: string }

export function createUser(req: Request<{}, CreateUserRes, CreateUserBody>, res: Response<CreateUserRes>) {
  const { name } = req.body
  const result: CreateUserRes = { id: "u_1", name }
  return res.status(201).json(result)
}

import express from "express"
import { getUser } from "./getUser"
import { createUser } from "./createUser"

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

app.get("/users/:id", getUser)
app.post("/users", createUser)

app.listen(3000, () => console.log("http://localhost:3000"))