tsconfig.json

{
  "$schema": "https://json.schemastore.org/tsconfig",
  "display": "EcmaScript Library",
  "env": {
    "browser": true,
    "jest": true,
    "es6": true
  },
  "compilerOptions": {
    "lib": ["DOM", "DOM.Iterable", "ESNext"],
    "module": "ESNext",
    "target": "ES5",
    "composite": false,
    "declaration": true,
    "declarationMap": true,
    "esModuleInterop": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "strictNullChecks": true,
    "useDefineForClassFields": true,
    "emitDecoratorMetadata": false,
    "experimentalDecorators": false,
    "forceConsistentCasingInFileNames": true,
    "allowSyntheticDefaultImports": true,
    "useUnknownInCatchVariables": true,
    "resolveJsonModule": true,
    "inlineSources": false,
    "isolatedModules": true,
    "moduleResolution": "node",
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "preserveWatchOutput": true,
    "skipLibCheck": true,
    "alwaysStrict": true,
    "strict": true
  },
  "include": ["."],
  "exclude": ["lib/", "build/", "node_modules/"]
}