tsconfig.json

{
  "compilerOptions": {
    /* Visit https://aka.ms/tsconfig to read more about this file */
    "target": "es2016" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
    /* Modules */
    "module": "commonjs" /* Specify what module code is generated. */,
    "rootDir": "./" /* Specify the root folder within your source files. */,
    "resolveJsonModule": true /* Enable importing .json files. */,
    /* 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. */,
    "maxNodeModuleJsDepth": 0 /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */,
    /* Emit */
    "declaration": true /* Generate .d.ts files from TypeScript and JavaScript files in your project. */,
    "emitDeclarationOnly": true /* Only output d.ts files and not JavaScript files. */,
    "outDir": "./" /* Specify an output folder for all emitted files. */,
    /* Interop Constraints */
    "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. */
  },
  "include": [
    "*.js",
    "data/*.js"
  ],
  "exclude": [
    "jest.config.js"
  ]
}