javascript - How is the pre-loaded html of the international version of Taobao Mobile implemented?

Question

Pay attention to the inside of class="main-content". A section of p is pre-loaded. When the data is requested, the previous pseudo-blank is replaced with the real p. I think Know how to achieve it~

Answer 1

The previous html is returned directly by server-side rendering, while the latter one needs to be generated after running js

Answer 2

These data are loaded asynchronously and dynamically, so use this p to occupy the position on the first screen to give you a better experience. Wait until you slide to the corresponding part before requesting the data. You can see the network request to find out.