tsconfig.json

{
  "include": ["./src"],
  "exclude": ["./lib", "./cjs", "./esm"],
  "compilerOptions": {
    /* Visit https://aka.ms/tsconfig to read more about this file */
    "rootDir": "./src",
    "target": "ES2021",
    "module": "ES2015" /* Specify what module code is generated. */,
    "declaration": true /* Generate .d.ts files from TypeScript and JavaScript files in your project. */,
    "declarationDir": "./lib",
    "outDir": "./esm" /* Specify an output folder for all emitted files. */,
    "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. */,
    "skipLibCheck": true /* Skip type checking all .d.ts files. */
  }
}