if you did the npm install in the newly cloned module folder then the request library would be added to the modules library list

Thank you again

var tw = document.body.clientWidth+(parseInt(m)*2);

var th = document.body.clientHeight+(parseInt(m)*2)

but one could get the module position( part of the config Info passed to module) and then get ITS size.
see the window.getComputedStyle(), used on line 221.

npm install 

in the module folder

https://github.com/sdetweil/MMM-ImagesPhotos

see the on-load handler , line 247 of the MMM-ImagesPhotos.js

			img.onload=  (evt) => {

https://github.com/sdetweil/MMM-ImagesPhotos

I center the image in the background(fullscreen_below), retaining the image dimension ratio, which css cover and contain do not.

to help with smoothing the transitions and not having blank screen, I use an onLoad() handler to hide the prior and visualize the just loaded image.

I have not tried these modifications in the middle_center mm position

mm is a web page, using normal css and styles

there are some predefined positions. see css/main.css