We are not able to check/see npm logs. A solution ‘à la travis’ (https://travis-ci.org) for instance can be really helpful during (re)deployment stage.
Well such logs are available (now ?)
The logs have been a bit hit-and-miss for me. Sometimes nothing seems to be logged at all, but refreshing the browser seems to fix it (though I’ve also lost changes doing this, possibly they weren’t written back to the server for the same reason the logs never came through).
I tend to keep the logs window open all the time, but it can a bit spammy telling you about errors while you’re typing (and causes some perf issues on my Chromebook).
Same problem using Safari or Firefox. This is related to “automatic redeployment each time a modification is performed on the project”. It breaks the performance and focus lost recurrent problem occurs …