tsconfig.json

{
    "compilerOptions": {
      /* Basic Options */
      "target": "es6",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
      "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
      "declaration": true,                     /* Generates corresponding '.d.ts' file. */
      "sourceMap": true,                        /* Generates corresponding '.map' file. */
  
      /* Directories */
      "outDir": "./dist",                      /* Redirect output structure to the directory. */
  
      /* Strict Type-Checking Options */
      "strict": true,                           /* Enable all strict type-checking options. */
  
      /* Additional Checks */
      "noUnusedLocals": true,                   /* Report errors on unused locals. */
      "noUnusedParameters": true,               /* Report errors on unused parameters. */
      "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */
      "noFallthroughCasesInSwitch": true,       /* Report errors for fallthrough cases in switch statement. */
  
      /* Module Resolution Options */
      "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
      "typeRoots": [                            /* List of folders to include type definitions from. */
        "./src/types",
        "./node_modules/@types"
      ],
  
  
      /* Advanced Options */
      "allowJs": true,                          /* Allow javascript files to be compiled. */
      "forceConsistentCasingInFileNames": true, /* Disallow inconsistently-cased references to the same file. */
      "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
      "resolveJsonModule": true,                /* Enables importing JSON Files. */
      "experimentalDecorators": true,           /* Enables experimental support for ES7 decorators. */
      "emitDecoratorMetadata": true             /* Enables experimental support for emitting type metadata for decorators. */
    },
}