# 싱글턴 패턴

---

인스턴스를 하나만 유지하기 위해 사용된다.

```
const Singleton = (() => {
  let instance;
  function createInstance() {
    const object = new Object({name: 'Object Instance'});
    return object;
  }
  return {
    getInstance: () => {
      if (!instance) {
        instance = createInstance();
      }
      return instance;
    }
  };
})();

const instance1 = Singleton.getInstance();
const instance2 = Singleton.getInstance();
console.log(instance1 === instance2); // true
```

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