tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "ES2015",
    "module": "commonjs",
    "allowJs": true,
    "checkJs": false,
    "declaration": true,
    "declarationMap": true,
    "sourceMap": true,
    "jsx": "react",
    "resolveJsonModule": true,


    /* Strict Type-Checking Options */
    "strict": true,
    "noImplicitAny": false, // once all ts this should be true
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "alwaysStrict": true,

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

    /* Module Resolution Options */
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,

    /* Libs */
    "lib": ["es2019"]
  },
  "exclude": ["webpack.config.js", "node_modules", "babel*", "test", "node_modules/"],
}