@mykle1 sorry, you are using some words that don’t describe well what the problem is…

i THINK you said

when I try to load image files (local to the MM system), I use a URL string. 
that URL string is 'relative' to the base of my server, defined by '??????' (you didn't supply that)

when a URL fails to load, I get error 404. (not found). 

but how do I handle this?

you would add an onerror() handler for the img object
this will get called ONLY when there is an error

img.onerror = funtion(event_object){
var img_with_error = event_object.currentTarget
img_with_error.src=??? the url of the failing image
}

see https://www.w3schools.com/jsref/obj_event.asp
for more info in decoding the event object

@sdetweil u start the motion tool with sudo motion &

And u can see it’s actions in /var/log/motion/motion.log

The tail command will show you the last few lines (default 20) of a file

@mykle1 note that your onerror handler could get stuck in a loop IF the forced replacement url also fails

@bkeyport now, and later, use the new library in your module and add it to your package.json.

then if the system provides it npm install will say ‘done’
and if the system doesn’t, then it will load it for your module…

@flipfloplife are you doing this over SSH? or if the PI is in console mode?

MM requires graphics mode… (display:0)

@cluelesscarter not windowed, but you can minimize. alt, spacebar, n. same as on windows.

but, if u open the developers window ctrl-shift-i on the keyboard, and select the elements tab, u can edit the styles directly. and then you know what to.put in css/custom.css. then u can reload with ctrl-r or refresh in the developers pane

@flipfloplife you could still be in text mode (console mode) vs the graphical desktop…

xwindows is display:0, so you shouldn’t have to change anything…

and my MMM-SleepWake works with webcam for motion detection and Lucy for remembering which modules are hidden when waking by voice or movement

and supports three different screen off approaches, tvservice (pi only) dpms (some monitors) and screen blanking(for auto power off devices, like TVs, EnergyStar)

@mdhenriksen said in Can't install / Error with NPM / Electron not found:

libgconf-2.so.4

a google search for ‘error while loading shared libraries: libgconf-2.so.4’
see https://github.com/electron/electron/issues/1518

note the missing g

libconf-2-4
should be
libgconf-2-4