From a blog post that is popular at the moment:

I had a "woah" moment once when one programmer got genuinely baffled about the fact that a website somehow "erases" the history of requests from the Network tab of Chrome DevTools. He was wondering what magic method was used to hide the communication. He hadn't realized the app was not a single-page JS application (SPA), and he actually wasn't aware there is another way to make web apps. The idea that each click actually makes the browser fetch a completely new page, without any JS involved, was alien to him.