I have a page showing thumbnails of posts. The posts are fetched via AJAX and a filter allows for different posts to be fetched. When a thumbnail is clicked, a carousel open
Seems like you're doing some really amazing coding gymnastics just to be able to share a link on LinkedIn. Why not try something simpler?
https://www.linkedin.com/sharing/share-offsite/?url={url}
Then you can hyperlink anything you want, control it with whatever CSS and JS you want, etc..
Source: Microsoft LinkedIn Share URL Documentation.
For example, this works for me:
https://www.linkedin.com/sharing/share-offsite/?url=http://www.wikipedia.org/
Works fine: