tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "checkJs": true,
    "allowSyntheticDefaultImports": true,
    "jsx": "preserve",
    "target": "esnext",
    "module": "esnext",
    "lib": [
      "dom",
      "esnext"
    ],
    "declaration": true,
    "declarationMap": true,
    "composite": true,
    "emitDeclarationOnly": true,
    "isolatedModules": true,

    /* Strict Type-Checking Options */
    "strict": true,

    /* Additional Checks */
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "importsNotUsedAsValues": "error",

    /* Module Resolution Options */
    "moduleResolution": "node",

    /* This needs to be false so our types are possible to consume without setting this */
    "esModuleInterop": false,
    "resolveJsonModule": true,
    "typeRoots": [
      "./node_modules/@types"
    ],
    "types": [ "node", "webpack-env" ]
  },
  "include": [ "js/src/**/*.ts", "js/src/**/*.tsx", "js/src/**/*.json" ]
}