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Translate js-environment-requirements #9

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10 changes: 5 additions & 5 deletions content/docs/reference-javascript-environment-requirements.md
Original file line number Diff line number Diff line change
@@ -1,14 +1,14 @@
---
id: javascript-environment-requirements
title: JavaScript Environment Requirements
title: JavaScript 環境の要件
layout: docs
category: Reference
permalink: docs/javascript-environment-requirements.html
---

React 16 depends on the collection types [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) and [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set). If you support older browsers and devices which may not yet provide these natively (e.g. IE < 11) or which have non-compliant implementations (e.g. IE 11), consider including a global polyfill in your bundled application, such as [core-js](https://github.com/zloirock/core-js) or [babel-polyfill](https://babeljs.io/docs/usage/polyfill/).
React 16 はコレクション型 [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) および [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) に依存しています。これらの機能をネイティブに提供しない(IE 11 未満など)、または標準非準拠な挙動をする(IE 11 など)古いブラウザやデバイスをサポートする場合は、[core-js](https://github.com/zloirock/core-js) [babel-polyfill](https://babeljs.io/docs/en/babel-polyfill/) などのような、グローバル環境のポリフィルをバンドルしたアプリケーションに含めることを検討してください。

A polyfilled environment for React 16 using core-js to support older browsers might look like:
古いブラウザをサポートするため、core-js を利用してポリフィルを含めた React 16 向けの環境は次のようになります。

```js
import 'core-js/es6/map';
Expand All @@ -23,8 +23,8 @@ ReactDOM.render(
);
```

React also depends on `requestAnimationFrame` (even in test environments).
You can use the [raf](https://www.npmjs.com/package/raf) package to shim `requestAnimationFrame`:
React は(テスト環境であっても)`requestAnimationFrame` に依存します。
`requestAnimationFrame` の役割を補うため [raf](https://www.npmjs.com/package/raf) を使用します。

```js
import 'raf/polyfill';
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