Detecting What's Been Seen

from blog Jeff Kaufman's Writing, | ↗ original
Sometimes it makes sense for sites want to treat things differently based on whether the user has seen them. For example, I like sites that highlight new comments (ex: EA Forum and LessWrong) and I'd like them even better if comments didn't lose their "highlighted" status in cases where I hadn't scrolled them into view. In writing my Mastodon...