> For the complete documentation index, see [llms.txt](https://lochiwei.gitbook.io/web/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lochiwei.gitbook.io/web/js/grammar/op/assign/destruct/nested.md).

# nested destructuring

[JS](/web/js.md) ⟩ [operator](/web/js/grammar/op.md) ⟩ [assignment](/web/js/grammar/op/assign.md) ⟩ [destructuring](/web/js/grammar/op/assign/destruct.md) ⟩ nested

{% tabs %}
{% tab title="💾 程式" %}
💾 程式：[replit](https://replit.com/@pegasusroe/JS-nested-destructuring#index.js)

```javascript
let opts = {
    size : {width: 100, height: 200},    // object in object
    items: ["Cake", "Donut"],            // array in object
    extra: true
};

// ⭐ nested destructuring
let {
  size : {width, height},
  items: [a, b],
  title = "Menu"                         // default value
} = opts;
// width=100, height=200, a="Cake", b="Donut", title="Menu"
```

{% endtab %}

{% tab title="📗 參考" %}

* [x] JS.info ⟩ [nested destructuring](https://javascript.info/destructuring-assignment#nested-destructuring)
* [ ] Ronald Chen ⟩ [Destructuring Nested Objects](https://medium.com/@pyrolistical/destructuring-nested-objects-9dabdd01a3b8)
* [ ] Jay Cruz ⟩ [How to Destructure Nested JavaScript Objects](https://dev.to/coderjay06/how-to-destructure-nested-javascript-objects-1dcl)
  {% endtab %}

{% tab title="👥 相關" %}

* [destructuring array](/web/js/grammar/op/assign/destruct/arr.md)
* [object destructuring](/web/js/grammar/op/assign/destruct/obj.md)
  {% endtab %}

{% tab title="⬇️ 應用" %}

* [app.makeTable()](/web/appendix/gas/app/member/maketable.md)
  {% endtab %}

{% tab title="🗣 討論" %}

* [ES6 deep nested object destructuring](https://stackoverflow.com/questions/40622385/es6-deep-nested-object-destructuring)
  {% endtab %}
  {% endtabs %}


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