tsconfig.json

{
  "compilerOptions": {
    "target": "es6",
    "lib": ["dom", "es6", "dom.iterable", "scripthost"],
    "module": "commonjs",

    "allowJs": true,
    "sourceMap": true,
    "noEmitOnError": false,
    "declaration": false,
    "removeComments": false,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,

    "noImplicitAny": true,
    "strictNullChecks": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noImplicitThis": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,

    "baseUrl": ".",
    "paths": {
      "testing": ["src/testing/index.js"],
      "components/*": ["src/app/components/*"],
      "services": ["src/app/services/index.js"]
    },
    "typeRoots": [
      "types",
      "node_modules/@types"
    ]
  },
  "include": [
    "types/global.d.ts",
    "types/testing.d.ts",
    "src/**/*.ts"
  ]
}