Add JavaScript Environment in the docs and fix a few things

docs/JavaScriptEnvironment.md

@@ -1,10 +1,18 @@
+---
+id: javascript-environment
+title: JavaScript Environment
+layout: docs
+category: Guides
+permalink: docs/javascript-environment.html
+next: activityindicatorios
+---
 
 ## JavaScript Runtime
 
 When using React Native, you're going to be running your JavaScript code in two environments:
 
 * In the simulator and on the phone: [JavaScriptCore](http://trac.webkit.org/wiki/JavaScriptCore) which is the JavaScript engine that powers Safari and web views. Due to the absence of writable executable memory in iOS apps, it doesn't run with JIT.
-* When using Chrome debugging, it runs all the JavaScript code within Chrome itself and communicate with the obj-c via WebSocket. So you are using [V8](https://code.google.com/p/v8/).
+* When using Chrome debugging, it runs all the JavaScript code within Chrome itself and communicate with Objective-C via WebSocket. So you are using [V8](https://code.google.com/p/v8/).
 
 While both environments are very similar, you may end up hitting some inconsistencies. We're likely going to experiment with other JS engines in the future, so it's best to avoid relying on specifics of any runtime.
 
@@ -14,12 +22,14 @@ While both environments are very similar, you may end up hitting some inconsiste
 React Native ships with many JavaScript transforms to make writing code more enjoyable. If you are curious, you can see the [implementation of all those transformations](https://github.com/facebook/jstransform/tree/master/visitors). Here's the full list:
 
 ES5
+
 * Reserved Words: `promise.catch(function() { });`
 
 ES6
-* Arrow function: `<TouchableHighlight onPress={() => { this.setState({pressed: true}); }}`
+
+* Arrow function: `<C onPress={() => this.setState({pressed: true})}`
 * Call spread: `Math.max(...array);`
-* Class: `class MyComponent extends React.Component { render() { return <View />; } }`
+* Class: `class C extends React.Component { render() { return <View />; } }`
 * Destructuring: `var {isActive, style} = this.props;`
 * Iteration: `for (var element of array) { }`
 * Computed Properties: `var key = 'abc'; var obj = {[key]: 10};`
@@ -29,5 +39,6 @@ ES6
 * Template: ``var who = 'world'; var str = `Hello ${who}`;``
 
 ES7
+
 * Object Spread: `var extended = { ...obj, a: 10 };`
 * Function Trailing Comma: `function f(a, b, c,) { }`