Yes, it definitely looks possible. There seems to be a JS library for controlling them at https://github.com/oyooyo/keyble/blob/master/keyble.js - however the protocol looks quite complex - it could take a while to get it running on Espruino...
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Yes, it definitely looks possible. There seems to be a JS library for controlling them at https://github.com/oyooyo/keyble/blob/master/keyble.js - however the protocol looks quite complex - it could take a while to get it running on Espruino...