tsconfig.json

{
	"compilerOptions": {
		/* 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'. */
		"lib": ["esnext", "dom"],                 /* Specify library files to be included in the compilation. */
		"declaration": true,                      /* Generates corresponding '.d.ts' file. */
		"outDir": "./dist",                       /* Redirect output structure to the directory. */
		// "rootDir": "./src",                    /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
		"removeComments": false,                   /* Do not emit comments to output. */
		"downlevelIteration": true,               /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
		"preserveConstEnums": true,

		/* Strict Type-Checking Options */
		"strict": true,                           /* Enable all strict type-checking options. */
		"noImplicitAny": false,                   /* Raise error on expressions and declarations with an implied 'any' type. */
		"noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */

		/* Module Resolution Options */
		"esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */

		/* Source Map Options */
		"sourceMap": true,                        /* Generates corresponding '.map' file. */
	  	"isolatedModules": true
	},
	"exclude": [
		"**/*.spec.ts",
		"**/TestUtils.ts",
		"**/TestSetup.ts"
	]
}