tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "module": "commonjs",
    "moduleResolution": "node",
    "esModuleInterop": true,
    "noEmit": true,
    "target": "es2015",
    /* Strict Type-Checking Options */
    "strict": true,
    /* Additional Checks */
    /* Report errors on unused locals. */
    "noUnusedLocals": true,
    /* Report errors on unused parameters. */
    "noUnusedParameters": true,
    /* Report error when not all code paths in function return a value. */
    "noImplicitReturns": true,
    /* Report errors for fallthrough cases in switch statement. */
    "noFallthroughCasesInSwitch": true
  }
}