tsconfig.json

{
    "compilerOptions": {
      "pretty": true,
      /* Basic Options */
      "target": "esnext",                       /* 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": [
        "dom"
      ],                             /* 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": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
      "declaration": true,                      /* Generates corresponding '.d.ts' file. */
      "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
      "sourceMap": true,                     /* Generates corresponding '.map' file. */
      // "outFile": "./",                       /* Concatenate and emit output to single file. */
      "outDir": "./dist",                          /* Redirect output structure to the directory. */
      // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
      // "composite": true,                     /* Enable project compilation */
      "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. */
      "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": "./src",                        /* Base directory to resolve non-absolute module names. */
      "paths": {
        "*": ["*", "../extra-types/*"]
      },                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
      // "rootDirs": ["dist", "extra-types"],                        /* 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": ["node", "jest"],                           /* 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": [
      "src/**/*",
    ],
    "exclude": [
      "node_modules",
      "**/*.spec.ts",
      "**/*.test.ts",
      "**/__mocks__/**"
    ]
  }