Open Website

Testing and Issues

You can test this app and submit issues during the testing period of the JavaScript Chart contest.

Entries with serious issues will not be able to win the contest, but even minor issues might be important for overall results.


by rating


Fair Mammoth May 8, 2019 at 13:04
— Overall performance is poor.

— Graphs jump on launch.
— The app is slow when scaling all graphs and filtering the third graph.
— Y-scale starts from zero (graphs #1 and #2).
— Filtering animations are missing (graph #5).
— Total value (graph #3) and percentage (graph #5) are missing.
iPhone 5S, iOS 12.1; LG Nexus 5X, Android 8.1.
Data filters not clickable
MBP 2018 15, Mojave, Chrome
Slim Chameleon Apr 17, 2019 at 18:45
It’s more optimized for touch devices, as well as zooming, as it was required for contest.
Slim Peacock Apr 18, 2019 at 17:36
- huge perfomace issues on every chart on every action

- no animation in tooltip

- no percents column in tooltip

- night mode doesnt affect button colors

- zooming with no internet connection make chart unusable

- page zooming allowed on mobiles
BQ strike mini, 4x1.3Hhz, 1Gb RAM, Chrome, Android 7
Slim Chameleon Apr 19, 2019 at 08:12
1. Yes, I know about performance issue :) But on the other hand I think your device is not so popular)

2. Yup

3. Sorry, didn’t understand what are you talking about

4. It’s not meant to change the button colors

5. Ofc, loading the page without the internet does it as well, it’s not pwa

6. Yes, I optimized interactive for touch devices, ofc I should do it for desktops as well but hadn’t enough time to do that, so I did at least minimal required :)
Kingly Chicken Apr 19, 2019 at 13:46
Zoom out icon is gone
Iphone x
Slim Chameleon Apr 19, 2019 at 14:41
As well as previous about checkboxes
Blank screen
macOS 10.14.3, Google Chrome 73.0.3683.103
Slim Chameleon Apr 17, 2019 at 12:56
it seems Iforgot make my urls relative
Chart #4: one-pixel height glitches under chart
I am not sure, but the reason could be no retina support or wrong clearRect (webgl: scissors) rectangular range.
Laptop / Chrome 73.0.3683.103 (Official Build) (64-bit) / Windows 10
Slim Chameleon Apr 17, 2019 at 17:23
I guess it's because of non integer rect height
Chart 2Y: wrong scale, not starting from min value
MBP 2018 15, Mojave, Chrome
Slim Chameleon Apr 17, 2019 at 18:46
Y, that functionality isn’t implemented
Chart 1Y: wrong scale, not starting from min value
MBP 2018 15, Mojave, Chrome
Slim Chameleon Apr 17, 2019 at 18:47
As well as previous
Funny Giraffe Apr 18, 2019 at 16:24
Bug with zooming in and out
iPhone 7, iOS 12.2, Safari
Slim Chameleon Apr 18, 2019 at 16:29
animation performs after xhr for every requested day is done, I agree I should make it smoother and do requests not one by one but async
Kingly Chicken Apr 19, 2019 at 13:44
No checkboxes, wrong y
Iphone X
Slim Chameleon Apr 19, 2019 at 14:40
Checkboxes are not shown because of its absolute path :) sorry for that

What about “wrong y”?
Kingly Chicken Apr 19, 2019 at 15:36
Wrong y I mean they asked the local y start from lowest visible value.
Slim Chameleon Apr 19, 2019 at 17:26
So then - Duplicate
The timeline (navigator) is still displayed for the zoomed mode of the single column chart.

The percentage chart seems upside down starting from the lowest values at the bottom, though still correct.

No tooltip display or sector separation on hover / touch / click on pie chart sectors.

I see a lot of efforts put into this work. No dislike from me.
Chrome 73
Slim Chameleon Apr 22, 2019 at 21:30
I decided not to disallow user scaling for zoomed 4th chart because it has too many x points

Yes, I didn’t implemented tooltip for pie chart)
My fault. Actually I realized I could do that only after I saw such implementing on other devs charts

Thanks a lot for review
Little Chameleon Apr 25, 2019 at 09:47
- desktop fully unusable
- in 5th chart when select 6th April and tap on tooltip - opened 3th April instead 6th
- in pie chart no tooltip
- strange check in/out lines in 3th chart
- no animation check in/out lines in 5th chart
- zero min value in 1th and 2th charts
Slim Chameleon Apr 25, 2019 at 13:24
1. But usable for phones) Ofc I should develop more usable interface for every platform but had to spend time on zooming
2. yep, probably mistake, but it is done as it is meant to be done, you always moving to the center
3. Not meant to be
4. Didn't understand exactly
5. agree
6. duplicate but you are right anyway, that's bad
Nobody added any issues yet...