It’s incredibly easy to find poorly made single-page applications (SPA) today. These applications break user expectations by not acting like standard webpages. The page title doesn’t update on navigation, the back/forward buttons don’t work, the scroll position is not saved, and refreshing the page causes surprising behavior.

A particularly bad site might be poorly optimized and take a while to load on a slow connection or perform poorly when rendered client-side.

SPAs tend to be written with libraries like React and Vue. They are great for developer productivity, and I find them a joy to use. What I don’t like