added hindi translation for js environment requirement

content/blog/2019-08-15-new-react-devtools.md

@@ -4,7 +4,7 @@ author: [bvaughn]
 ---
 We are excited to announce a new release of the React Developer Tools, available today in Chrome, Firefox, and (Chromium) Edge!
 
-## What's changed?
+## What's changed? {#whats-changed}
 
 A lot has changed in version 4!
 At a high level, this new version should offer significant performance gains and an improved navigation experience.
@@ -14,7 +14,7 @@ It also offers full support for React Hooks, including inspecting nested objects
 
 [Visit the interactive tutorial](https://react-devtools-tutorial.now.sh/) to try out the new version or [see the changelog](https://github.com/facebook/react/blob/master/packages/react-devtools/CHANGELOG.md#400-august-15-2019) for demo videos and more details.
 
-## Which versions of React are supported?
+## Which versions of React are supported? {#which-versions-of-react-are-supported}
 
 **`react-dom`**
 
@@ -26,7 +26,7 @@ It also offers full support for React Hooks, including inspecting nested objects
 * `0`-`0.61`: Not supported
 * `0.62`: Will be supported (when 0.62 is released)
 
-## How do I get the new DevTools?
+## How do I get the new DevTools? {#how-do-i-get-the-new-devtools}
 
 React DevTools is available as an extension for [Chrome](https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi?hl=en) and [Firefox](https://addons.mozilla.org/en-US/firefox/addon/react-devtools/).
 If you have already installed the extension, it should update automatically within the next couple of hours.
@@ -37,14 +37,14 @@ If you use the standalone shell (e.g. in React Native or Safari), you can instal
 npm install -g react-devtools@^4
 ```
 
-## Where did all of the DOM elements go?
+## Where did all of the DOM elements go? {#where-did-all-of-the-dom-elements-go}
 
 The new DevTools provides a way to filter components from the tree to make it easier to navigate deeply nested hierarchies.
 Host nodes (e.g. HTML `<div>`, React Native `<View>`) are *hidden by default*, but this filter can be disabled:
 
 ![DevTools component filters](../images/blog/devtools-component-filters.gif)
 
-## How do I get the old version back?
+## How do I get the old version back? {#how-do-i-get-the-old-version-back}
 
 If you are working with React Native version 60 (or older) you can install the previous release of DevTools from NPM:
 
@@ -70,7 +70,7 @@ yarn build:extension
 # Follow the on-screen instructions to complete installation
 ```
 
-## Thank you!
+## Thank you! {#thank-you}
 
 We'd like to thank everyone who tested the early release of DevTools version 4.
 Your feedback helped improve this initial release significantly.

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

@@ -1,14 +1,14 @@
 ---
 id: javascript-environment-requirements
-title: JavaScript Environment Requirements
+title: जावास्क्रिप्ट पर्यावरण आवश्यकताएँ
 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 संग्रह के प्रकार पर निर्भर करता है [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) और [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set)। यदि आप पुराने ब्राउज़रों और उपकरणों का समर्थन करते हैं, जो अभी तक ये मूल रूप से प्रदान नहीं कर सकते हैं (जैसे IE <11) या जिनके पास गैर-अनुरूप कार्यान्वयन हैं (उदाहरण IE 11), तो अपने बंडल किए गए एप्लिकेशन में एक वैश्विक polyfill शामिल करें, जैसे कि [core-js](https://github.com/zloirock/core-js) या [babel-polyfill](https://babeljs.io/docs/usage/polyfill/)।
 
-A polyfilled environment for React 16 using core-js to support older browsers might look like:
+पुराने ब्राउज़र का समर्थन करने के लिए core-js का उपयोग करके React 16 के लिए एक polyfilled वातावरण ऐसा दिख सकता है:
 
 ```js
 import 'core-js/es/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`:
+React `requestAnimationFrame` पर भी निर्भर करती है (परीक्षण वातावरण में भी)।
+आप `requestAnimationFrame` के समर्थन के लिए [raf](https://www.npmjs.com/package/raf) package का उपयोग कर सकते हैं :  
 
 ```js
 import 'raf/polyfill';

content/docs/reference-profiler.md

@@ -16,7 +16,7 @@ Its purpose is to help identify parts of an application that are slow and may be
 > To opt into production profiling, React provides a special production build with profiling enabled.
 > Read more about how to use this build at [fb.me/react-profiling](https://fb.me/react-profiling)
 
-## Usage
+## Usage {#usage}
 
 A `Profiler` can be added anywhere in a React tree to measure the cost of rendering that part of the tree.
 It requires two props: an `id` (string) and an `onRender` callback (function) which React calls any time a component within the tree "commits" an update.
@@ -70,7 +70,7 @@ render(
 >
 > Although `Profiler` is a light-weight component, it should be used only when necessary; each use adds some CPU and memory overhead to an application.
 
-## `onRender` Callback
+## `onRender` Callback {#onrender-callback}
 
 The `Profiler` requires an `onRender` function as a prop.
 React calls this function any time a component within the profiled tree "commits" an update.