Add typescript to a node project

To add typescript to your node project, run the following commands within your node project’s root directory.

npm install typescript --save-dev
npm install @types/node --save-dev
touch tsconfig.json

Open tsconfi.json created from the last command above, and add the following basic typescript configs.

{
  "compilerOptions": {
    "module": "commonjs",
    "esModuleInterop": true,
    "target": "es6",
    "moduleResolution": "node",
    "sourceMap": true,
    "outDir": "dist"
  },
  "lib": ["es6"]
}

To add type support for a library if the library supports typescript, run the following command to add it, replace “libraryname” with the actual library name.

npm install @types/libraryname --save-dev