Im quite new to web development but I've managed to write a simple mockup of an alternative one-finger keyboard layout (Based on swipes rather than buttons).

This would originally just be a generic demo of the layout, but as I've been progressing with Javascript, I'be been wondering what is the real possibility of implementing this system-wide. Is there a way to send text from an app in dashboard to, for example, a text-field on another active app?

I'd just like to be pointed in the right direction.