tsconfig.base.json

{
  "compilerOptions": {
    "target": "ES6", // compiles down to ES6 for better compatibility with modern browsers and Node.js
    "module": "ESNext", // uses ES modules to enable tree shaking and module optimization
    "moduleResolution": "node", // resolves modules like Node.js, helpful for Node and frontend compatibility
    "esModuleInterop": true, // allows importing CommonJS modules with `import` syntax (e.g., `import x from 'y'`)
    "forceConsistentCasingInFileNames": true, // prevents issues from inconsistent file name casing across different OSes (e.g., "foo.ts" vs "Foo.ts")
    "strict": true, // enables all strict type-checking options (e.g., `noImplicitAny`, `strictNullChecks`, etc.) for better type safety
    "skipLibCheck": true, // speeds up compilation by skipping type checking of declaration files (.d.ts), useful for large projects
    "noUncheckedIndexedAccess": true, // ensures array elements and object properties are properly checked for undefined when accessed with an index (e.g., `arr[0]`)
    "noEmit": true, // disables generating output files, just checks types; useful as a linter for type-checking without building
    "types": ["node"] // includes Node.js types for better IntelliSense and type-checking
  }
}