javascript-app-wrapper

An executable JAR which can be run as a desktop app

UI is JavaScript/HTML/CSS running in JavaFX WebView window (Webkit JS engine)
Javascript worker threads for processor intensive work and system calls (Nashorn JS engine)
Small Kotlin program linking UI and workers
Dev mode to watch JavaScript/HTML/CSS and reload app on changes
Firebug lite example for debugging UI

Quick start

Make sure you have Java JRE installed so you can run executable JAR files (I used JDK 9 to test)
Download release javascript-app-wrapper-0.0.1.jar
Double-click the jar to run the demo app:

Click "Log" to log a message to the Firebug console
Click "Work" to do some work in a background thread. Click it a few times and watch your CPU go to 75% for a while.

Exit the demo then extract the demo app files:

C:\test>java -jar javascript-app-wrapper-0.0.1.jar unpackage
Created: web\worker.js
Created: web\ui.js
Created: web\ui.html
Created: web\ui.css

Run the app from the command line in "dev" mode

C:\test>java -jar javascript-app-wrapper-0.0.1.jar
Nov. 23, 2017 8:08:07 PM tornadofx.Stylesheet$Companion detectAndInstallUrlHandler
INFO: Installing CSS url handler, since it was not picked up automatically
In dev mode. Watching C:\test\web

Make some changes:
- In the web folder edit ui.css and change the background to brown.
- Edit ui.html and change the header to <h1>My Custom App!</h1>
- Remove the debug lines from ui.html:
```

<script type='text/javascript' src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
```
- Notice that the app reloads as each change is saved:

Exit the modified app package the changes into a new executable jar:

C:\test>java -jar javascript-app-wrapper-0.0.1.jar package MyCustomApp.jar
Deleted: /web/worker.js
Deleted: /web/ui.js
Deleted: /web/ui.html
Deleted: /web/ui.css
Added: web/ui.css
Added: web/ui.html
Added: web/ui.js
Added: web/worker.js
Packaged: MyCustomApp.jar

Double-click MyCustomApp.jar to run the customised code

Build and run from source

 ./gradlew clean shadowJar
 java -jar build/libs/javascript-app-wrapper-all.jar

To test dev mode unpack first...

java -jar build/libs/javascript-app-wrapper-all.jar unpackage

...then rebuild and run

./gradlew shadowJar && java -jar build/libs/javascript-app-wrapper-all.jar

sgdan/javascript-app-wrapper

javascript-app-wrapper

Quick start

Build and run from source