tsconfig.json

{
  "compilerOptions": {
    "baseUrl": "./", // enables project relative paths config
    //"outDir": "dist/", // target for compiled files
    "allowSyntheticDefaultImports": true, // no errors with commonjs modules interop
    "esModuleInterop": true,
    "allowJs": false, // include js files
    "checkJs": false, // typecheck js files
    "declaration": true,
    "declarationDir": "./lib",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true, // importing helper functions from tslib
    "noEmitHelpers": true, // disable emitting inline helper functions
    "lib": [
      "dom",
      "es2016",
      "es2017.object"
    ],
    "target": "es2015", // "es2015" for ES6+ engines
    "module": "es2015", // "es2015" for tree-shaking
    "moduleResolution": "node",
    "noEmitOnError": false,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "traceResolution": false,
    "strict": true,
    "strictNullChecks": true,
    "pretty": true,
    "removeComments": true,
    "sourceMap": true,
    "resolveJsonModule": true,
    "composite": true,
    "declarationMap": true,
    "rootDir": "src"
},
  "exclude": [
    "node_modules",
    "dist",
    "lib",
    "**/__tests__/*.test.ts",
    "__tests__"
  ]
}