Short answer: Yes, you can save code on it, and that will run at startup. Details at http://www.espruino.com/Saving
Thanks @AkosLukacs
@user117414 started
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.
Short answer: Yes, you can save code on it, and that will run at startup. Details at http://www.espruino.com/Saving