lonekorean / mini-preview Goto Github PK

I am using this solution for my client. There is a page where I implemented this for loading of 50+ previews, but it really drags down the loading time of the landing page. Currently this minipreview is the best solution and I keep using it in spite of loading times because my client has insisted on it, but I was wondering if there are ways to make previews load faster?

Something like making iframe load only portion of the website for preview? Lowering the quality of the displayed preview? Perhaps even loading a single div from the page from which preview is generated from? I would modify it by myself to test it, but I don't know how to code this.

Could you please help me further with this or suggest a piece of code I could add to achieve this? Thanks in advance.

Previews sometimes open even when my mouse cursor didn't get to the link.
I am moving my mouse from the below towards to the link and the preview opens but i still didn't put
my mouse on the hyperlink. I noticed they open as soon as I hover the mouse above the invisible preview window that would have appeared if everything was normal.
Look at my short comic/example

Hi,
kindly create sample fiddle to preview xls/.xls file as thumbnail

thank you

Consider changing the option of width and height to a concrete css style.

If link to a github page, no preview.
Anyone knows why?
Thank you!