tsconfig.json

{
  "compilerOptions": {
    // Only emist .d.ts declaration files, tsup will handle the rest.
    "declaration": true,
    "emitDeclarationOnly": true,
    // Generate source maps for .d.ts files (enables "go to source" for consumers)
    "declarationMap": true,
    // Generate .js.map source maps for debugging
    "sourceMap": true,
    // Keep const enum declarations in output (safer with isolatedModules)
    "preserveConstEnums": true,
    // Enable all strict type-checking options
    "strict": true,
    // Enable ergonomic default imports from CommonJS modules
    "esModuleInterop": true,
    // This is only for type checking, tsup will handle the emitted code.
    "module": "commonjs",
    "moduleResolution": "node",
    // Compile to ES2022 (supports top-level await, Array.at(), etc.)
    "target": "ES2022",
    // Include ES2022 standard library types
    "lib": ["ES2022"],
    // Preserve comments in compiled output
    "removeComments": false,
    // Allow JS files so TypeScript can infer types from .js config files (e.g. lexer_config.js)
    "allowJs": true,
    // Skip type-checking of all .d.ts files for faster compilation
    "skipLibCheck": true,
    // Skip type-checking of default library .d.ts files
    "skipDefaultLibCheck": true,
    // Colorized, readable compiler error output
    "pretty": true,
    // Prevent issues on case-insensitive file systems (macOS/Windows)
    "forceConsistentCasingInFileNames": true,
    // Ensure each file can be independently transpiled (required by ts-jest and bundlers)
    "isolatedModules": true,
    // Enable JSX support for React (used by Storybook stories)
    "jsx": "react-jsx",
    // Output compiled files to the lib/ directory
    "outDir": "./lib"
  },
  "include": ["src"],
  "exclude": ["node_modules", "lib", "README.md", "**/*.test.ts", "src/stories"]
}