Semantically, hashes are supposed to be used to point to different parts of a page, not to different pages. I'm breaking semantics. Lots of pages break semantic

Semantically, hashes are supposed to be used to point to different parts of a page, not to different pages. I'm breaking semantics. Lots of pages break semantics this way, though. It's a way to hack around being able to change the URL without a page reloading. That's worse for semantics, but better for performance. It can cause issues if you're not careful. For example, if I change just the hash, the page won't reload. On the other hand, it's not hard to be careful. You listen for hashchange events, and when one comes, you reload the body of the page. Of course, the upside is that it's a lot faster that way. I don't need to refresh the whole page. I just grab a small markdown file, render it with libraries already loaded, and dump it into a div. There are also minor issues around a11y, and around web crawlers. Again, you just want to be a little bit careful. And if you're doing this for yourself, you probably don't care about a11y or web crawlers.