tsconfig.json

{
  "compilerOptions": {
    // project options
    "lib": ["ESNext"], // 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": "es6", // Target environment. Most modern browsers support ES6, but you may want to set it to newer or older. (defaults to ES3)
    "module": "CommonJS",
    "declaration": true,
    "resolveJsonModule": true,
    // Module resolution
    "baseUrl": "./src", // 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"
    "paths": {}, // A series of entries which re-map imports to lookup locations relative to the baseUrl

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

    // Strict Checks
    "strict": true,

    // Linter Checks
    "noImplicitReturns": true,
    "noUncheckedIndexedAccess": true, // accessing index must always check for undefined
    "noUnusedLocals": true, // Report errors on unused local variables.
    "noUnusedParameters": true // Report errors on unused parameters in functions
  },
  "include": ["./**/*.ts"],
  "exclude": ["node_modules/**/*"]
}