Typescript - get/set property

get-set.ts

class User {
  private _birthDate: string;
  
  // can behave like a LAZY property
  get birthDate(): string {
    if (this._birthDate) {
      return this._birthDate;
    }

    return this._birthDate = '1981-11-11';
  }

  set birthDate(value: string) {
    this._birthDate = value;
  }
}

// usage
const user = new User();
user.birthDate                  // => '1981-11-11'
user.birthDate = '1982-12-12'   // => '1982-12-12'
user.birthDate                  // => '1982-12-12'