Providing an inter-process communication (IPC) mechanism such that a WebPage can explicitly signal back to PhantomJS as a push, thus eliminating/minimizing the need for users to setup polling functions, etc.
In PhantomJS 1.6, @detro added a WebPage
onCallback handler that could be triggered from a webpage client by invoking the specially attached
window.callPhantom function. However, @ariya expressed some discontent with this approach and so the three of us began discussing utilizing an existing API for cross-domain messaging instead:
window.postMessage. (See Discussion for more info.)
PhantomJS currently only allows for a single handler per signal (a separate problem I'm working on over here). As such, automatically attaching internal handler may prevent users from attaching their own handlers for