tsconfig.json

{
  "compilerOptions": {
    "skipLibCheck": true,
    // Basic Options
    "target": "es2017", // Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'.
    "module": "commonjs", // Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'.
    // Specify library files to be included in the compilation.
    "lib": [
      "dom", // Required to access `window`
      "es2017" // Required by `@sindresorhus/is`
    ],
    // "allowJs": true,                       // Allow javascript files to be compiled.
    // "checkJs": true,                       // Report errors in .js files.
    "jsx": "react", // Specify JSX code generation: 'preserve', 'react-native', or 'react'.
    // "declaration": true,                   // Generates corresponding '.d.ts' file.
    // "sourceMap": true,                     // Generates corresponding '.map' file.
    // "outFile": "./",                       // Concatenate and emit output to single file.
    // "outDir": "./",                        // Redirect output structure to the directory.
    "rootDir": "./ts", // Specify the root directory of input files. Use to control the output directory structure with --outDir.
    // "removeComments": true,                // Do not emit comments to output.
    // "noEmit": true,                        // Do not emit outputs.
    // "importHelpers": true,                 // Import emit helpers from 'tslib'.
    // "downlevelIteration": true,            // Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'.
    // "isolatedModules": true,               // Transpile each file as a separate module (similar to 'ts.transpileModule').

    // 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).
    "resolveJsonModule": true,
    // "baseUrl": "./",                       // Base directory to resolve non-absolute module names.
    // "paths": {},                           // A series of entries which re-map imports to lookup locations relative to the 'baseUrl'.
    // "rootDirs": [],                        // List of root folders whose combined content represents the structure of the project at runtime.
    // "typeRoots": [],                       // List of folders to include type definitions from.
    // "types": [],                           // Type declaration files to be included in compilation.
    // "allowSyntheticDefaultImports": true,  // Allow default imports from modules with no default export. This does not affect code emit, just typechecking.
    "esModuleInterop": true // Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'.
    // "preserveSymlinks": true,              // Do not resolve the real path of symlinks.

    // Source Map Options
    // "sourceRoot": "./",                    // Specify the location where debugger should locate TypeScript files instead of source locations.
    // "mapRoot": "./",                       // Specify the location where debugger should locate map files instead of generated locations.
    // "inlineSourceMap": true,               // Emit a single file with source maps instead of having a separate file.
    // "inlineSources": true,                 // Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set.

    // Experimental Options
    // "experimentalDecorators": true,        // Enables experimental support for ES7 decorators.
    // "emitDecoratorMetadata": true,         // Enables experimental support for emitting type metadata for decorators.
  },
  "include": ["ts/**/*"]
}