tsconfig.json

{
  "compilerOptions": {

    // Project options
    "outDir": "./dist/",
    "target": "ES2020",
    "module": "ESNEXT", // forced by roolup typescript plugin
    "importHelpers": true, // forced by roolup typescript plugin
    "noEmit": false, // forced by roolup typescript plugin

    // Module resolution
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "isolatedModules": true,
    "resolveJsonModule": true,
    "moduleResolution": "node", // forced by roolup typescript plugin

    // Type checking
    "skipDefaultLibCheck": true,
    "skipLibCheck": true,


    // Code quality
    "strict": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "strictNullChecks": true,
    "forceConsistentCasingInFileNames": true,
    "importsNotUsedAsValues": "error",
    
    // Watch options
    "noEmitHelpers": false, // forced by roolup typescript plugin
    "noResolve": false // forced by roolup typescript plugin    
  },
  "include": ["./src/**/*.ts", "./src/**/*.tsx"]
}