What is the stream method in browser-sync?

Question

css

Explain what is the essence of this method? I understand correctly that if you change, for example, only the css file in the project, then the page will not change completely, only the styles in the browser will be re-rendered or what?

Answer 1

It just returns something from the stream. It can be css, html, js, images. The bottom line is that it tells browser-sync which part of the entire web page to reload.
That is, if you answer your question, then, in fact, yes - it is the styles that will be loaded.