The view chart should be start from 0. Look JS_7 screenshot from task. About zooming I thought you know.
Good work in general.

test zooming

no total in tooltip

identical label colors of yaxes and cannot select value out of range

Hey,

I like your charts. They are smooth and fast.
But you have a small issue with tooltip: sometimes data inside is not correct.

Selected line on bar chart has not straight sides
(check attachment) and there is no "ALL" value in tooltip (screenshot JS_6 in task)

But it works really fast, great job!

This is actually pretty awesome. Good job

Something went wrong with nameplate

It is possible to scroll whole page while moving slider. IMHO it should be prevented.

Really great work!
But there is an annoying issue. Sometimes simple taps on buttons are detected as long taps. Adding video, there I used simple taps, but at 2nd and 4th buttons long tap was caught. It happens when tap is quick enough

The Y axes look strange during a transition

The values on the Y scales on the 2nd chart don't inherit the lines colors. The switch theme button has an untidy font.

The dates just appear instead of fading in on a zooming in

Good job. Looks very smooth and fast

Amazing fast initial loading

And issue is: Appels and Oranges are not visible in scaler bar chart

No bonus goals but I like your approach binary search used for search minimax - it is fast solution. Voted for BS. Good luck in contest

— Overall performance is good.
— Scaling the first graph produces some lags.
— Switching themes causes all the graphs filled with black. This only is fixed after tapping the graphs.
— The graphs take the entire width of the page when viewed from desktop browsers.

Fast app. An unpleasant glitch when tapping on filters.

Stacked - bars overlap each other
Stacked, bars - when trimmer side to most-right/most-left and scaling the most-right/most-left bar is moving and rendered outside of chart