Setup

Create new directory for the project and enter into it

mkdir typescript-crud-api
cd typescript-crud-api

Git

git init -b main

code .gitignore

node_modules/
build/
.env

Initialize node

yarn init --yes

Add TypeScript

yarn add typescript

code tsconfig.json

{
  "compilerOptions": {
    "lib": ["es5", "es6", "dom"],
    "target": "es6",
    "module": "commonjs",
    "moduleResolution": "node",
    "outDir": "./build",
    "rootDir": "./src",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "esModuleInterop": true,
    "resolveJsonModule": true
  }
}

Create application root file

mkdir ./src
code ./src/index.ts

console.log('Application is up and running!');

Add nodemon and concurrently to automate (re)building at development

yarn add nodemon concurrently

code package.json

  ...
  "license": ...,
  "scripts": {
    "dev": "concurrently npm:start:*",
    "start:build": "tsc -w",
    "start:server": "nodemon ./build/index.js",
    "start": "node ./build/index.js",
    "build": "tsc",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  ...

yarn dev

We should see "Application is up and running!" on terminal output (maybe a restart will be required for the first run).

Commit

git add .
git commit -m "Setup"

Next step: Express