tsconfig.json

{
  "compilerOptions": {
    // project options
    "lib": ["ES2020"], // specifies which default set of type definitions to use ("DOM", "ES6", etc)
    "outDir": "dist", // .js (as well as .d.ts, .js.map, etc.) files will be emitted into this directory.,
    "removeComments": true, // Strips all comments from TypeScript files when converting into JavaScript- you rarely read compiled code so this saves space
    "target": "ES2020", // Target environment. Most modern browsers support ES6, but you may want to set it to newer or older. (defaults to ES3)
    "module": "ESNext",


    // Module resolution
    "baseUrl": "./", // Lets you set a base directory to resolve non-absolute module names.
    "esModuleInterop": true, // fixes some issues TS originally had with the ES6 spec where TypeScript treats CommonJS/AMD/UMD modules similar to ES6 module
    "moduleResolution": "node", // Pretty much always node for modern JS. Other option is "classic"

    // Source Map
    "sourceMap": true, // enables the use of source maps for debuggers and error reporting etc
    "sourceRoot": "/", // Specify the location where a debugger should locate TypeScript files instead of relative source locations.

    // Strict Checks
    "strictNullChecks": true, // When strictNullChecks is true, null and undefined have their own distinct types and you’ll get a type error if you try to use them where a concrete value is expected.

    "declaration": true, // Generates a declaration .d.ts file for every .ts file.
    "skipLibCheck": true, // Skip type checking of all declaration files (*.d.ts).
    "allowSyntheticDefaultImports": true, // Allow default imports from modules with no default export. This does not affect code emit, just typechecking.
    // "resolveJsonModule": true, // Allow importing .json files
    "typeRoots": ["node_modules/@types", "src/@types"], // Specify multiple folders that act like `./node_modules/@types`.
    "types": ["node"],
    "experimentalDecorators": true,
    "resolveJsonModule": true
  }
}