They’re known as sparklines: https://indieweb.org/sparkline and you’ll find some interesting details and implementations in the see also section in addition to (I’m sure) searching Jeremy’s site for the word “sparkline”.
Reply to Chris Beckstrom about sparklines
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Chris Aldrich
I'm a biomedical and electrical engineer with interests in information theory, complexity, evolution, genetics, signal processing, IndieWeb, theoretical mathematics, and big history. I'm also a talent manager-producer-publisher in the entertainment industry with expertise in representation, distribution, finance, production, content delivery, and new media. View all posts by Chris Aldrich
Ah, cool, thanks Chris!