This is a really great article, and I really appreciate how it explains the different parts of how JPEG works with so much clarity and interactive visualizations.

However, I do have to give one bit of critique: it also makes my laptop fans spin like crazy even when nothing is happening at all.

Now, this is not intended as a critique of the author. I'm assuming that she used some framework to get the results out quickly, and that there is a bug in how that framework handles events and reactivity. But it would still be nice if whatever causes this issue could be fixed. It would be sad if the website had the same issue on mobile and caused my phone battery to drain quickly when 90% of the time is spent reading text and watching graphics that don't change.