Summary:
React Native Playground has been sunset, so I've replaced the examples that previously used it with examples using [Snack](http://snack.expo.io/).
The examples are directly embedded and can be edited live to see updates. The code itself is also in the docs, so we can easily update the docs in one place and we don't have to actually go to a saved app on Snack and update it there.
Run it locally, go to the `Animations` section and the `Direct Manipulation` section.
![screen shot 2017-04-03 at 6 29 51 pm](https://cloud.githubusercontent.com/assets/90494/24638271/ff3ad044-189b-11e7-845d-24b2fb612d95.png)
Open it on your phone, notice that it falls back to just showing plain code.
<img src="https://cloud.githubusercontent.com/assets/90494/24638547/203ec8fc-189e-11e7-99c8-dfabff949f8d.PNG" width="250">
- Get rid of the Expo new user experience dialog that you see when you open a Snack -- is this a dealbreaker
Closes https://github.com/facebook/react-native/pull/13285
Differential Revision: D4828011
Pulled By: hramos
fbshipit-source-id: 684ad24a14deb72abb8587ffbb726d316f126d75
Summary:
This PR adds the interactive [React Native Web Player](http://dabbott.github.io/react-native-web-player/) to the docs. The web player is an embeddable iframe which runs React Native code using components from [react-native-web](https://github.com/necolas/react-native-web). For now, it's primarily for educational purposes, since only the basic components are implemented.
Some details:
- The iframe is loaded from MaxCDN using rawgit, locked down to a git tag.
- Asset paths (i.e. images) are resolved relative to `//facebook.github.io/react-native/`
- When viewed on mobile, it falls back to the syntax-highlighted code blocks.
The WebPlayer can be inserted into markdown by using the fences:
```
```ReactNativeWebPlayer
import ...
AppRegistry.registerComponent ...
`` `
```
![screen shot 2016-06-22 at 12 46 50 pm](https://cloud.githubusercontent.com/assets/1198882/16281068/7056804e-3877-11e6-82f7-ece245690548.png)
I didn't actually add the WebPlayer to any docs pages in this PR. That we c
Closes https://github.com/facebook/react-native/pull/8328
Differential Revision: D3471527
Pulled By: lacker
fbshipit-source-id: 704da41cd77e08c7e2bc820557a74d36e88e8eb7