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[docs] Make it clear which Guides are platform-specific

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This is in preparation for open sourcing React Native for Android.
Also add hyphens to URLs for consistency. This can break people's
browser bookmarks but it's better to be consistent and we can
redirect to docs: https://github.com/facebook/react-native/issues/2137

Test plan: Ran the website locally using `cd website; npm start`
and checked all pages render correctly.
http://i.imgur.com/RrPNgRr.png

Will update "Getting Started", "Tutorial", "Debugging" and
"Testing" separately.
This commit is contained in:
Martin Konicek
2015-07-27 18:03:46 +01:00
parent a803e3217e
commit 01911e5e06
9 changed files with 20 additions and 21 deletions
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docs/JavaScriptEnvironment.md
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@@ -11,12 +11,11 @@ next: navigator-comparison
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.
* On iOS simulators and devices, Android emulators and devices React Native uses [JavaScriptCore](http://trac.webkit.org/wiki/JavaScriptCore) which is the JavaScript engine that powers Safari. On iOS JSC doesn't use JIT due to the absence of writable executable memory in iOS apps.
* When using Chrome debugging, it runs all the JavaScript code within Chrome itself and communicates 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.
## JavaScript Syntax Transformers
Syntax transformers make writing code more enjoyable by allowing you to use new JavaScript syntax without having to wait for support on all interpreters.