Accessors (get/set) & Readonly Properties

Getters & Setters

class Counter {
  private _value = 0;
  get value() { return this._value; }
  set value(v: number) { if (v >= 0) this._value = v; }
}

const c = new Counter();
c.value = 10; // uses setter
console.log(c.value); // getter → 10

readonly Modifier (compile‑time only)

class Config {
  readonly apiUrl = "https://api.example.com";
}

const cfg = new Config();
// cfg.apiUrl = "..."; // ❌ error