You need a few Wordpress plugins. who knows these?

Question

WordPress

1. You need a plugin that will increase the image on the site.
For example, like here: n-wp.ru/28062
2. A plugin that waits for the page to load and shows the preloader.
An example is the same site n-wp.ru/28062

Answer 1

1. In the same place below the download link https://wordpress.org/plugins/ajax-lightbox-image-...
2. Not necessary. Try to show the content as early as possible to the user, even if it is not fully loaded - To
prevent the page from falling apart, take out critical styles in html
- Use progressive jpeg
- Set image sizes in the img tag so that there are no text jumps when loading images.
-So that there are no voids in place of unloaded images, wrap them in span elements and set the background color to it = the main color of the image.
-Load scripts and styles asynchronously.

Answer 2

Here's the same example - joaopereirawd.github.io/fakeLoader.js/demo/demo1.html
But if a Javascript error occurs during the loading process, your site will not appear.
And then the lost visitors will have to pay for the beauty.