Are there plugins for something like this?

Question

JavaScript

I don’t even know what it’s called :)
But the bottom line is that when an ajax request is made, the page content is preloaded as gray blocks describing the basic structure, as in this picture


After the end of the ajax request, everything is revealed into content, like here

I’m wondering if there are plugins for this I would like to know the original name.

Answer 1

why plugins? C jQuery, for example, is generally elementary: There is, for example, a block with id="content" with the class "loading", for which the background is just a picture with a structure.

$('#content').load('url для запроса', function(){$(this).removeClass('loading')} )

api.jquery.com/load

Answer 2

This is a Facebook feature.
try searching for "lazy load facebook", I'm sure you'll find something similar.