tsconfig.json

{
  "include": ["src", "types"],
  "compilerOptions": {
    "target": "es5",
    "module": "esnext",
    "lib": ["dom", "esnext"],
    "importHelpers": true,
    "declaration": true,
    "sourceMap": true,
    "rootDir": "./",
    "strict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "moduleResolution": "node",
    "baseUrl": "./",
    "paths": {
      "@src": ["src/index.ts"],
      "@src/*": ["src/*"],
      "@test/*": ["test/*"],
      "@assets/*": ["node_modules/@patternfly/react-core/dist/styles/assets/*"]
    },
    "jsx": "react",
    "esModuleInterop": true
  }
}