Also if someone says this is useless an interesting use case could be e.g. a hybrid navigation application https://karussell.wordpress.com/2014/05/04/graphhopper-in-th... or portable native apps using a webview
BTW: I got lots of errors in the Firefox console saying 'Error: Assertion failed: A non-running thread has an expired quantum' although the example works (should have a progress bar :))
I suspect the assertion failure is caused by some of their modifications to Doppio's start up code to pause and extend the main thread's runtime.
[0] https://docs.oracle.com/javase/7/docs/api/java/nio/MappedByt...
(I contribute to both Javapoly and Doppio)
Javapoly tries to make Doppio easier to use (in my subjective opinion):
* easier loading of jars, classes and Java source code * a promise based async interface to Java methods * automatic marshaling of primitive values between JS and Java lands * a proxy based interface into the Java namespace.
As a very crude analogy: shells and editors make it easy to use the filesystem. But we can't contribute the shell / editor to the filesystem! They sit in different layers of the stack.