Each Mediawiki page has CSS/JS dependencies and the list of dependencies is not always the same (mostly depending on which extensions are used in a page). Within Mediawiki, the solution which provides this feature is called the "ResourceLoader".
Currently, the ResourceLoader dependencies are not retrieved by the OCG crawler module. This was until now not needed by the OCG PDF backend. But, if we want to generate ZIM files, which are based on an HTML output, a correct handling of the CSS/JS dependencies is mandatory. This ticket is about retrieving the list of dependencies necessary for each page and their retrieving within OCG & MWoffliner.
Steps:
1 - Start a small NodeJS demo program for the new functionality
2 - Given an article and an API URL, code a function able to download the list of JS and CSS dependencies
3 - Merge this code to allow OCG download of these dependencies
4 - Merge this code to allow MWoffliner to download these dependencies and render them correctly in the HTML files
Hint:
Have a look to "lib/mediawiki.DOMPostProcessor.js" in Parsoid source code.