tsconfig.json

{
  "compilerOptions": {
		/* Basic Options */
		"outDir": "dist",
		/* for manifest/index.js */
		"allowJs": true,
		"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
		"module": "esnext", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
		"jsx": "react",
		"lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
		"removeComments": true, /* Do not emit comments to output. */
		"noEmit": true, /* Do not emit outputs. */
		"noEmitOnError": true,

    "esModuleInterop": true,
    "isolatedModules": true,

		/* Strict Type-Checking Options */
		"strict": true,
		"noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */

		/* Additional Checks */
		"allowSyntheticDefaultImports": true,
		"noUnusedParameters": true, /* Report errors on unused parameters. */
		"noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
		"useDefineForClassFields": true,
		"forceConsistentCasingInFileNames": true,
		"skipLibCheck": true,

		/* Module Resolution Options */
		"moduleResolution": "node",
		"resolveJsonModule": true,
		"declaration": true,
		"pretty": true,
		"newLine": "lf",
		"stripInternal": true,
		"noUnusedLocals": true,
  },
  "include": [
    "src/**/*", "src/manifest/index.js"
  ],
  "exclude": [
    "node_modules"
	],
	"awesomeTypescriptLoaderOptions": {
		"useBabel": true,
		"babelCore": "@babel/core", // needed for Babel v7,
		"useCache": true, // Use internal file cache to improve warm-up time.
	}
}