Well done! This looks impressive and really useful. I’ve been looking for a lightweight sprite / spark lib for a while. Clients always, for some reason, are very impressed by little charts in a table row, doing this witha normal size chart lib kills page performance. I was literally including very basic html indicators in a presentation today and client where really impressed! This really solves that issue!

And even more. Really great that you van manipulate the elements as css. Most chart libs I’ve dealt with makes non-trivial customization impossible.

I’ll probably be building this in as Lowdefy blocks[1].

Just curious, did you consider just branding it as sparks.css / sprites.css or something? Going the spark / sprite route just sets the expectations a lot lower imo. Although congrats, you are really close to fully functional charts here! Really interested to see how far this can go.

[1] - https://lowdefy.com