Add types.

.eslintrc.js

@@ -7,7 +7,6 @@ export default {
     'plugin:@typescript-eslint/recommended',
     'plugin:prettier/recommended'
   ],
-  ignorePatterns: ['tsconfig.json'],
   parser: '@typescript-eslint/parser',
   plugins: ['@typescript-eslint'],
   root: true

app.js → app.ts

@@ -8,14 +8,15 @@ import bodyparser from 'koa-bodyparser'
 import json from 'koa-json'
 import koaStatic from 'koa-static'
 import logger from 'koa-logger'
+// @ts-ignore
 import onerror from 'koa-onerror'
+// @ts-ignore
 import render from 'koa-art-template'
 
 import index from './routes/index.js'
 import user from './routes/user.js'
 
 const _dirName = dirname(fileURLToPath(import.meta.url))
-console.log(_dirName)
 
 // error handler
 onerror(app)
@@ -46,15 +47,15 @@ render(app, {
 
 // logger
 app.use(async (ctx, next) => {
-  const start = new Date()
+  const start = Number(new Date())
   await next()
-  const ms = new Date() - start
+  const ms = Number(new Date()) - start
   console.log(`${ctx.method} ${ctx.url} - ${ms}ms`)
 })
 
 // routes
-app.use(index.routes(), index.allowedMethods())
-app.use(user.routes(), user.allowedMethods())
+app.use(index.routes()).use(index.allowedMethods())
+app.use(user.routes()).use(user.allowedMethods())
 
 // error-handling
 app.on('error', (err, ctx) => {

bin/www.js → bin/www.ts

@@ -1,10 +1,11 @@
 #!/usr/bin/env node
+// @ts-nocheck
 
 /**
  * Module dependencies.
  */
 
-import app from '../app.js'
+import app from '../app.ts'
 import http from 'http'
 import debugModule from 'debug'
 const debug = new debugModule('demo:server')

package.json

@@ -14,11 +14,11 @@
   "type": "module",
   "version": "0.1.0",
   "scripts": {
-    "dev": "npx nodemon bin/www",
+    "dev": "npx nodemon bin/www.ts",
     "format": "prettier --plugin-search-dir . --write .",
     "lint": "eslint .",
-    "prd": "pm2 start bin/www",
-    "start": "node bin/www",
+    "prd": "pm2 start bin/www.ts",
+    "start": "npx ts-node bin/www.ts",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "dependencies": {
@@ -35,6 +35,13 @@
     "koa-static": "^5.0.0"
   },
   "devDependencies": {
+    "@types/debug": "^4.1.7",
+    "@types/koa": "^2.13.6",
+    "@types/koa-bodyparser": "^4.3.10",
+    "@types/koa-json": "^2.0.20",
+    "@types/koa-logger": "^3.1.2",
+    "@types/koa-router": "^7.4.4",
+    "@types/koa-static": "^4.0.2",
     "@typescript-eslint/eslint-plugin": "^5.58.0",
     "@typescript-eslint/parser": "^5.58.0",
     "eslint": "^8.38.0",

routes/index.js → routes/index.ts

@@ -1,7 +1,8 @@
+import { ParameterizedContext } from 'koa'
 import koaRouter from 'koa-router'
 const router = new koaRouter()
 
-router.get('/', async (ctx, next) => {
+router.get('/', async (ctx: ParameterizedContext, next) => {
   await ctx.render('index', {
     title: 'Hello Koa 2!'
   })

tsconfig.json

@@ -1,15 +1,15 @@
 {
   // "extends": "./config/base",
   // "files": ['app.ts', 'index.ts'],
-  "include": ["./src/**/*"],
+  "include": ["./**/*"],
   // "exclude": [ "./src/temp/**/*" ],
   "compilerOptions": {
     "baseUrl": "./",
     "module": "ESNext",
     "target": "ESNext",
     // "lib": [ "ESNext", "DOM" ],
-    "typeRoots": ["src/types", "node_modules/@types"],
-    // "outDir": "./dist",
+    "typeRoots": ["./types", "node_modules/@types"],
+    "outDir": "./dist",
     // "outFile": "./dist/bundle.js",
     "sourceMap": true,
     "allowJs": true,
@@ -31,5 +31,8 @@
     // "strictNullChecks": true,
     // "forceConsistentCasingInFileNames": true,
     // "noFallthroughCasesInSwitch": false,
+  },
+  "ts-node": {
+    "esm": true
   }
 }

types/index.d.ts

@@ -0,0 +1,2 @@
+declare module 'koa-onerror'
+declare module 'koa-art-template'