UnityJS is a plugin for Unity 5 that integrates JavaScript and web browser components into Unity, including a JSON messaging system and a C# bridge, using JSON.net.

It works on WebGL, Android, iOS, macOS, and Windows [TODO].

UnityJS is derived from gree's unity-webview https://github.com/gree/unity-webview

unity-webview is derived from keijiro-san's https://github.com/keijiro/unity-webview-integration .

It is placed under sample/. You can open it and import the plugin as below:

1. Open sample/Assets/Sample.unity.
2. Open dist/UnityJS.unitypackage and import all files. It might be easier to extract dist/UnityJS.zip instead if you've imported UnityJS before.

With the new Unity Hub, you can have several versions of Unity installed. But the project configuration expects the Unity app to be in /Applications/Unity/Unity.app . In order to link to the Unity libraries, you should make a symlink to the one you want, like:

ln -s /Applications/Unity/Hub/Editor/2018.3.4f1/Unity.app /Applications/Unity/Unity.app

Since Unity 5.3.0, Unity.app is built with ATS (App Transport Security) enabled and non-secured connection (HTTP) is not permitted. If you want to open http://foo/bar.html with this plugin on Unity OS X Editor, you need to open /Applications/Unity5.3.4p3/Unity.app/Contents/Info.plist with a text editor and add the following,

--- Info.plist~	2016-04-11 18:29:25.000000000 +0900
+++ Info.plist	2016-04-15 16:17:28.000000000 +0900
@@ -57,5 +57,10 @@
 	<string>EditorApplicationPrincipalClass</string>
 	<key>UnityBuildNumber</key>
 	<string>b902ad490cea</string>
+	<key>NSAppTransportSecurity</key>
+	<dict>
+		<key>NSAllowsArbitraryLoads</key>
+		<true/>
+	</dict>
 </dict>
 </plist>

or invoke the following from your terminal,

/usr/libexec/PlistBuddy -c "Add NSAppTransportSecurity:NSAllowsArbitraryLoads bool true" /Applications/Unity/Unity.app/Contents/Info.plist

The "build" directory contains a rake script to build the code, and a Unity project to create "dist/UnityJS.unitypackage" and "dist/UnityJS.zip".

rake
rake pack

The sample project has symbolic links into the source code and built libraries, so you can use it to develop and debug the library without reinstalling the unity package after every change. Do not attempt to install the UnityJS.unitypackage into the sample project, since that will stomp on those links and might write over the source code.