Need to understand what the site uses to add other blocks?

Question

CMS

I want to write my own online store, I took the site brandshop .ru as a basis, after viewing the HTML code of the main page, I can’t understand where the sliders come from, since the code for this is "< products-slider slider-id="18"></products -slider >", there are also codes that peculiarly add the "Add to Cart" button and other sliders under different id.

There are attributes like:
< template v-if="!!productsData.products && computeProductBtn" >
v-bind:disabled="!activeSize"
v-on:click="addProductToCart(false)

" uses the site to display different blocks, for example, the "Popular Products" slider or "You Recently Viewed" if it is a CMS,