tsconfig.json

{
  //Inherits settings from ../tsconfig.all.jsonc which is at root level
  "extends": ["../../tsconfig.all.jsonc"],

  //Tells TypeScript to only compile files inside the src/ folder and its subdirectories.
  //It includes .ts, .tsx, .js, and .jsx
  "include": ["src/**/*"],

  //compilerOptions inherited from tsconfig.all.jsonc are overridden here.
  // i have taken reference from spark/web compilerOptions.In that also we are overridding
  "compilerOptions": {
    //Provides Node.js global types and  includes types for Vitest which is used by test files
    "types": ["node", "vitest"],

    "outDir": "dist", // Output directory for compiled files

    //same as what we do in Spark , a node_modules folder at root level , with in a subfolder named 'export'
    "tsBuildInfoFile": "../../node_modules/.buildinfo/export",

    //Allows TypeScript to compile JavaScript files
    "allowJs": true,

    //Disables type checking on .js files.
    "checkJs": false,

    //Ensures that functions always return a value.for example there is whole code of function wrapped under IF statment,
    //then it will throw  Error: Not all code paths return a value.
    "noImplicitReturns": true,

    //Forces explicit undefined checks when accessing arrays or objects.
    //for example let x = arr[0]; // Error: x might be undefined.
    //to fix this let x: number[] | undefined or let x = arr[0] as number;
    "noUncheckedIndexedAccess": true,

    //Ensures function parameters are used.// Error: 'name' is unused.
    "noUnusedParameters": true,

    //strict it self holds 6 different type of checks
    //strictNullChecks-Error: Type 'null' is not assignable to 'string'
    //noImplicitAny-Error: Parameter 'name' implicitly has an 'any' type
    //strictFunctionTypes-Error: Type '(age: number) => void' is not assignable to type '(name: string) => void'
    //strictBindCallApply-
    //strictPropertyInitialization-
    //noImplicitThis-
    "strict": true,

    "isolatedModules": true
  }
}