Add .jsx extension support (codesandbox#53)

* Add .jsx extension support

* Update compareTitle check based on PR feedback

* Add @bengummer as a contributor

Author: bengummer

.all-contributorsrc

@@ -43,6 +43,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "bengummer",
+      "name": "Ben Gummer",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1089897?v=3",
+      "profile": "https://github.com/bengummer",
+      "contributions": [
+        "code"
+      ]
     }
   ]
 }

README.md

@@ -1,4 +1,4 @@
-# [CodeSandbox](https://codesandbox.io) [![Chat](https://img.shields.io/badge/chat-on%20discord-7289da.svg)](https://discord.gg/KE3TbEZ) [![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors) [![Build Status](https://travis-ci.org/CompuIves/codesandbox-client.svg?branch=master)](https://travis-ci.org/CompuIves/codesandbox-client)
+# [CodeSandbox](https://codesandbox.io) [![Chat](https://img.shields.io/badge/chat-on%20discord-7289da.svg)](https://discord.gg/KE3TbEZ) [![All Contributors](https://img.shields.io/badge/all_contributors-4-orange.svg?style=flat-square)](#contributors) [![Build Status](https://travis-ci.org/CompuIves/codesandbox-client.svg?branch=master)](https://travis-ci.org/CompuIves/codesandbox-client)
 
 An online code editor with a focus on React.
 
@@ -44,8 +44,8 @@ CodeSandbox consists several separate servers, some of these are open sourced.
 Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds/all-contributors#emoji-key)):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
-| [<img src="https://avatars0.githubusercontent.com/u/587016?v=3" width="100px;"/><br /><sub>Ives van Hoorne</sub>](http://ivesvh.com)<br />[💬](#question-CompuIves "Answering Questions") [📝](#blog-CompuIves "Blogposts") [🐛](https://github.com/CompuIves/CodeSandbox/issues?q=author%3ACompuIves "Bug reports") [💻](https://github.com/CompuIves/CodeSandbox/commits?author=CompuIves "Code") [🎨](#design-CompuIves "Design") [📖](https://github.com/CompuIves/CodeSandbox/commits?author=CompuIves "Documentation") [💡](#example-CompuIves "Examples") [🚇](#infra-CompuIves "Infrastructure (Hosting, Build-Tools, etc)") [👀](#review-CompuIves "Reviewed Pull Requests") [⚠️](https://github.com/CompuIves/CodeSandbox/commits?author=CompuIves "Tests") [🔧](#tool-CompuIves "Tools") | [<img src="https://avatars0.githubusercontent.com/u/887639?v=3" width="100px;"/><br /><sub>Donavon West</sub>](http://donavon.com)<br />[💻](https://github.com/CompuIves/CodeSandbox/commits?author=donavon "Code") | [<img src="https://avatars0.githubusercontent.com/u/5266810?v=3" width="100px;"/><br /><sub>Jeff Allen</sub>](http://www.jeffallen.io/)<br />[💻](https://github.com/CompuIves/CodeSandbox/commits?author=vueu "Code") |
-| :---: | :---: | :---: |
+| [<img src="https://avatars0.githubusercontent.com/u/587016?v=3" width="100px;"/><br /><sub>Ives van Hoorne</sub>](http://ivesvh.com)<br />[💬](#question-CompuIves "Answering Questions") [📝](#blog-CompuIves "Blogposts") [🐛](https://github.com/CompuIves/CodeSandbox/issues?q=author%3ACompuIves "Bug reports") [💻](https://github.com/CompuIves/CodeSandbox/commits?author=CompuIves "Code") [🎨](#design-CompuIves "Design") [📖](https://github.com/CompuIves/CodeSandbox/commits?author=CompuIves "Documentation") [💡](#example-CompuIves "Examples") [🚇](#infra-CompuIves "Infrastructure (Hosting, Build-Tools, etc)") [👀](#review-CompuIves "Reviewed Pull Requests") [⚠️](https://github.com/CompuIves/CodeSandbox/commits?author=CompuIves "Tests") [🔧](#tool-CompuIves "Tools") | [<img src="https://avatars0.githubusercontent.com/u/887639?v=3" width="100px;"/><br /><sub>Donavon West</sub>](http://donavon.com)<br />[💻](https://github.com/CompuIves/CodeSandbox/commits?author=donavon "Code") | [<img src="https://avatars0.githubusercontent.com/u/5266810?v=3" width="100px;"/><br /><sub>Jeff Allen</sub>](http://www.jeffallen.io/)<br />[💻](https://github.com/CompuIves/CodeSandbox/commits?author=vueu "Code") | [<img src="https://avatars0.githubusercontent.com/u/1089897?v=3" width="100px;"/><br /><sub>Ben Gummer</sub>](https://github.com/bengummer)<br />[💻](https://github.com/CompuIves/CodeSandbox/commits?author=bengummer "Code") |
+| :---: | :---: | :---: | :---: |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!

src/sandbox/eval/index.js

@@ -19,7 +19,7 @@ function doEval(
   const html = /\.html$/;
   const css = /\.css$/;
   const json = /\.json$/;
-  const js = /\.js$/;
+  const js = /\.jsx?$/;
 
   if (html.test(mainModule.title)) {
     return evalRaw(