What was used to develop these sites?

Question

Web development

Who understands, tell me what was used to develop such sites?

https://unit-studio.ru/
https://www.sasco.ru/
https://goldensuisse.com/

Sites load very quickly, instantly, and when you switch between pages, you get the feeling that you are using the application.

Even through the code inspector I tried to change something on the site, and when I went to a new page, these changes remained, as if the site did not update the page.
For example: I made the logo red or black background, clicked on any page, and the logo remained the same without resetting the changes in the code inspector.

What is it? How to do this?

Answer 1

Single-page application
Made on any modern framework (Svelte, Angular, Vue), or without them at all, with any library for client-side routing

Answer 2

The first site seems to be standard, with page reloading.
The second and third are Nuxt.js + Vue.js.
There may also be sites on Angular, React or self-written with AJAX.

Even through the code inspector I tried to change something on the site, and when I went to a new page, these changes remained, as if the site did not update the page.

This may just be the effect of caching the CSS file.

Answer 3

These sites make heavy use of javascript. If you pay attention, there are no links in the menu. Instead, click events are hung on li elements. All this is very bad for SEO. And the speed of work is not the merit of the technologies on which these sites are made, but the merit of the minimalism of the DOM structure.