tsconfig.json

{
  "compilerOptions": {
    /* Language and Environment */
    "target": "es5",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "lib": ["es2017"],                                   /* Specify a set of bundled library declaration files that describe the target runtime environment. */
    /* Modules */
    "module": "CommonJS",                                	/* Specify what module code is generated. */
    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
    "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
    /* JavaScript Support */
    "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
    "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
    /* Emit */
    "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
    // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
    "outDir": "./dist",                                   /* Specify an output folder for all emitted files. */
    "removeComments": true,                           /* Disable emitting comments. */
    /* Interop Constraints */
    "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
    /* Type Checking */
    "strict": true,                                      /* Enable all strict type-checking options. */
    /* Completeness */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  }
}