I edit a good amount of technical articles about the web, and there is a tendency for authors to be super broad in their opening sentence, like “What we’re able to do on the web has expanded greatly over the years.”
I tend to remove stuff like that because it usually doesn’t serve the article well, even though I understand the sentiment. It’s so true, browsers are capable of so much. Most of us are probably unaware of a lot of things the browser can do.
Just look at Luigi De Rosa’s list here. I’d bet a lot of you didn’t know the browser could do all that stuff — push notifications! Native sharing menus! Picture-in-picture!
It’s mostly JavaScript stuff and a little CSS. Notably absent: anything in HTML.