/practice-expressjs-typescript

Primary LanguageTypeScript

This project is for learning TypeScript with Express.js

🚀 Initialize project.

  1. Create TypeScript config file: tsc --init
  2. Create package.json file: yarn init -y

🚧 Install packages.

  • Dependencies: yarn add express
  • Dev dependencies: yarn add -D @types/express ts-node-dev tsconfig-paths typescript

🤨 About packages

  • @types/express : Express package type. (In dependencies, we use express for application, so we need to install type of express.)
  • ts-node-dev : Directly execute TypeScript on Node.js without precompiling. (Also use in scripts in package.json like nodemon to recompile when files change.)
  • tsconfig-paths : Required if you config paths in tsconfig.json and want to use ts-node-dev

🔧 Config dev scripts

  1. Go to package.json
  2. Create dev script: "ts-node-dev --respawn --transpile-only --watch src -r tsconfig-paths/register src/index.ts"
  3. To run application (in terminal) using command: yarn dev

🤨 About flags in ts-node-dev

  • --respawn : Keep watching for change after executed.
  • --watch src : Hot reload all files in src.
  • -r tsconfig-paths/register : Require tsconfig.json and use this config file.
  • src/index.ts : Last arguments is main file to compile.