If you update with the Web IDE (info on uploading widgets is at http://www.espruino.com/Bangle.js+Widgets#how-to-develop) then you'll be able to see an error message pointing you at the problem (if there is one). You can also just re-upload if it makes the watch stop working.
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.
Sorry, that was my bad. I'd written the code wrong so it wasn't valid JS (just fixed now).
So instead of:
you want:
If you update with the Web IDE (info on uploading widgets is at http://www.espruino.com/Bangle.js+Widgets#how-to-develop) then you'll be able to see an error message pointing you at the problem (if there is one). You can also just re-upload if it makes the watch stop working.