memo

[SOunit]

setup project

• create package.json

npm init -y

• typescript init

tsc --init

• add ts-node to auto compile for typescript files

npm i --save-dev ts-node

auto reload

1. use ts-node-dev

npm i --save-dev typescript ts-node ts-node-dev

  "scripts": {
    "start": "ts-node-dev --respawn src/index.ts",
  },

2. use nodemon(in case 1st approach do not work in window or etc.)

npm i --save-dev nodemon

  "scripts": {
    "dev": "nodemon --exec ts-node src/index.ts",
  },

express

npm i express

npm i --save-dev @types/express @types/node

type vs. interface

• interface for object
• type for not object

@types

• for library not having type!
• @types/sample.d.ts