> For the complete documentation index, see [llms.txt](https://typescript-jp.gitbook.io/deep-dive/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://typescript-jp.gitbook.io/deep-dive/recap/references.md).

# リファレンス

リテラル以外にも、JavaScriptにおけるすべてのオブジェクト(関数、配列、正規表現 etc)は参照(references)です。これは、以下のことを意味します。

## 変更(Mutation)はすべての参照(references)に影響する

```javascript
var foo = {};
var bar = foo; // barは同じオブジェクトへの参照です

foo.baz = 123;
console.log(bar.baz); // 123
```

## 比較は、参照(references)に対して行われる

```javascript
var foo = {};
var bar = foo; // barはfooへの参照です
var baz = {}; // bazはfooとは異なる新しいオブジェクトです

console.log(foo === bar); // true
console.log(foo === baz); // false
```


---

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