tsconfig.json

{
  "compilerOptions": {
    "target": "esnext",
    "module": "esnext",
    "moduleResolution": "node",
    "rootDir": "./src" /* Specify the root folder within your source files. */,
    "lib": ["ES2016", "dom"],
    "declaration": true /* Generate .d.ts files from TypeScript and JavaScript files in your project. */,
    "isolatedModules": true /* Ensure that each file can be safely transpiled without relying on other imports. */,
    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */,
    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
    "strict": true /* Enable all strict type-checking options. */,
    "outDir": "./lib",
  },
  "exclude": ["node_modules", "./tsconfig.json", "./demo/"],
  "include": ["src/**/*", "custom.d.ts",]
}