Translate JavaScript Environment Requirements (#34)

* Translate JavaScript Environment Requirements

* Replaced: 구식 -> 오래된

* Replaced: 구식 -> 오래된

Author: taggon

content/docs/reference-javascript-environment-requirements.md

@@ -1,14 +1,14 @@
 ---
 id: javascript-environment-requirements
-title: JavaScript Environment Requirements
+title: JavaScript 환경 요구사항
 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 버전은 컬렉션 자료형인 [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map)과 [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set)을 사용합니다. 이 기능을 자체적으로 지원하지 않거나(예. IE 11 미만) 지원은 하지만 잘 호환되지 않는(예. IE 11) 오래된 브라우저나 기기에서도 React를 사용해야 한다면 애플리케이션에 [core-js](https://github.com/zloirock/core-js)나 [babel-polyfill](https://babeljs.io/docs/usage/polyfill/) 같은 전역 폴리필(polyfill)을 포함하는 것도 고려해보세요.
 
-A polyfilled environment for React 16 using core-js to support older browsers might look like:
+다음은 오래된 브라우저 지원을 위해 core-js 폴리필을 적용한 환경에서 React 16 버전을 사용하는 예시입니다.
 
 ```js
 import 'core-js/es6/map';
@@ -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`:
+React에는 `requestAnimationFrame` 기능도 필요한데, 이는 테스트 환경에서도 사용됩니다.
+오래된 브라우저에서는 [raf](https://www.npmjs.com/package/raf) 패키지를 사용하여 `requestAnimationFrame` 기능을 지원할 수 있습니다.
 
 ```js
 import 'raf/polyfill';