TypeScript로 빌더 패턴 구현

class MissionBuilder {
    constructor() {
      this._mission = { name: '', target: '', priority: 'MEDIUM', weapons: [], location: 'UNKNOWN' };
    }
    setName(name) { this._mission.name = name; return this; }
    setTarget(target) { this._mission.target = target; return this; }
    setPriority(p) { this._mission.priority = p; return this; }
    addWeapon(w) { this._mission.weapons.push(w); return this; }
    setLocation(l) { this._mission.location = l; return this; }
    build() {
      if (!this._mission.name || !this._mission.target) throw new Error('필수 항목 누락');
      return { ...this._mission };
    }
  }

  const mission = new MissionBuilder()
    .setName('OPERATION SKYNET')
    .setTarget('JOHN CONNOR')
    .setPriority('CRITICAL')
    .addWeapon('PLASMA RIFLE')
    .addWeapon('MINIGUN')
    .setLocation('LOS ANGELES')
    .build();

  Object.entries(mission).forEach(([k, v]) => {
    const el = document.createElement('div');
    el.style.marginBottom = '4px'; el.style.fontSize = '11px';
    el.innerHTML = `<span style="color:#f59e0b;">${k}</span>: <span style="color:#888;">${Array.isArray(v) ? v.join(', ') : v}</span>`;
    document.currentScript.parentElement.appendChild(el);
  });