tsconfig.json

//     "lib": [ "es2015", "es2017", "dom" ],
//     "target": "es5",

{
  "compilerOptions": {
    "baseUrl": "./", // enables absolute path imports
    // "paths": { // define absolute path mappings
    //   "@src/*": ["src/*"] // will enable -> import { ... } from '@src/components'
    //   // in webpack you need to add -> resolve: { alias: { '@src': PATH_TO_SRC } }
    // },
    "outDir": "dist/", // target for compiled files
    "allowSyntheticDefaultImports": true, // no errors on commonjs default import
    "allowJs": true, // include js files
    "checkJs": true, // typecheck js files
    "declaration": false, // don't emit declarations
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true, // importing helper functions from tslib
    "noEmitHelpers": true, // disable emitting inline helper functions
    "jsx": "react", // process JSX
    "lib": [
      "dom",
      "es2016",
      "es2017.object"
    ],
    "target": "es5", // "es2015" for ES6+ engines
    "module": "commonjs", // "es2015" for tree-shaking
    "moduleResolution": "node",
    "noEmitOnError": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "strict": true,
    "pretty": true,
    "removeComments": true,
    "sourceMap": true,
    "skipLibCheck": true
  },
  "include": [
    "src/**/*"
  ],
  "exclude": [
    "node_modules",
    "public",
    "content",
    "static",
    "themes"
  ]
}