tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es6", // 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'.
    "lib": ["es6", "dom", "es2017"], // Specify library files to be included in the compilation.
    "allowJs": true, // Allow javascript files to be compiled.
    // "checkJs": true,                       // Report errors in .js files.
    "jsx": "react-native", // 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": "./",                       // 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.,
    // "incremental": true, // Enable incremental compilation,
    // "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.
    // "noImplicitAny": true,                 // Raise error on expressions and declarations with an implied 'any' type.
    // "strictNullChecks": true,              // Enable strict null checks.
    // "strictFunctionTypes": true,           // Enable strict checking of function types.
    // "strictPropertyInitialization": true,  // Enable strict checking of property initialization in classes.
    // "noImplicitThis": true,                // Raise error on 'this' expressions with an implied 'any' type.
    // "alwaysStrict": true,                  // Parse in strict mode and emit "use strict" for each source file.

    /* 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).
    "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'. */
      "*": ["js/*"],
      "tests": ["tests/*"]
    },
    // "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'.
    "resolveJsonModule": true
    // "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. */
  },
  "exclude": [
    "node_modules",
    "babel.config.js",
    "metro.config.js",
    "jest.config.js"
  ]
}