tsconfig.json

{
  "$schema": "https://json.schemastore.org/tsconfig",
  
  // Ref: https://github.com/tsconfig/bases/blob/main/bases/node20.json
  "compilerOptions": {
    // Emission
    "noEmit": true, // Do not emit by default (only type check)
    //"emitDeclarationOnly": true,
    "target": "es2022", // JavaScript language version to emit
    "module": "es2022", // The type of file to emit (CommonJS/ESM/etc.)
    //"esModuleInterop": true,
    //"allowSyntheticDefaultImports": true,
    
    // Imports
    "moduleResolution": "bundler", // Resolve import specifiers like bundlers (allows explicit file extensions)
    "allowImportingTsExtensions": true, // Allow importing `.ts` extensions
    "allowJs": false, // If `true` allows to import `.js` files
    //"resolveJsonModule": true, // Allow importing `.json` files
    "forceConsistentCasingInFileNames": true, // Do not allow case-insensitive import file name matching
    
    // Type checking
    "lib": ["es2022", "DOM"], // Library declaration files to include (globally)
    "skipLibCheck": true, // Do not type check declaration files (for performance)
    "noErrorTruncation": true,
    
    // Language
    "isolatedModules": true, // Restrict language features not compatible with tools like babel
    "strict": true,
    "exactOptionalPropertyTypes": true,
    "noUncheckedIndexedAccess": true
  },
  "include": [
    "./src",
    "./tests"
  ]
}