tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,                        // Allow JavaScript files to be imported inside your project, instead of just .ts and .tsx files.
    "allowSyntheticDefaultImports": true,   // Allows you to write an import
    "baseUrl": "./src",                     // Base directory to resolve non-absolute module names.
    "checkJs": false,                       // Works in tandem with allowJs. When checkJs is enabled then errors are reported in JavaScript files.
    "esModuleInterop": true,                // Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'.
    "experimentalDecorators": true,         // Enables experimental support for ES7 decorators.
    "jsx": "react",                         // Controls how JSX constructs are emitted in JavaScript files.
    "lib": [
      "es2015",
      "DOM"                                 // https://testing-library.com/docs/webdriverio-testing-library/intro/#typescript
    ],
    "module": "commonjs",                   // Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'.
    "outDir": "./core",
    "target": "es2015",                     // Changes which JS features are downleveled and which are left intact.
    "types": [                              // Packages listed will be included in the global scope
      "@testing-library/jest-dom",
      "jest",
      "node",
    ],
  },
  "include": [                              // Specifies an array of filenames or patterns to include in the program
    "docs/**/*",
    "docs/**/.*",
    "src/**/*",
    "src/**/.*",
    "types/.*",
  ],
  "exclude": [
    "core",
    "coverage",
    "lib",
    "node_modules",
  ]
}