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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 14:14
No graphs displayed at all both on mobile and desktop.
iPhone 5S, iOS 12.1; LG Nexus 5X, Android 8.1
Large Beaver May 11, 2019 at 19:03
Thank you for detail review. I ll deep test it on proposed devices.
Data won't load; uses abs path (from root /)
Deleted Account Apr 17, 2019 at 16:39
Used ext link:  Looks fast and nice, but all chart area prevents scrolling
IPhone 6/Safari/12.2
Large Beaver Apr 17, 2019 at 22:34
Thanks, I ll fix it after contest end
Wrong timeline (navigator) for the pie chart.

No long touch / long click was implemented.

I used the public version at because I can see that the last modified date of the main js file is before the contest deadline (see one of the screenshots)

Even though the contest dev version doesn't work, I think this work doesn't deserve a dislike. So, no dislike from me.
Chrome 73
Large Beaver Apr 21, 2019 at 20:32
Thank you for the good review. I agree with the submitted bugs. Unfortunately I am hurried to realize all the bonus goals and made enough of bugs in main goals.
Windows 8/Chrome
- 2Y chart's axes starts from 0 which is wrong
- leftover "animated" bar in the background after zoom out stacked bar chart
- wrong minimap presentation in zoomed-in state of bar chart - unnecessary blue background
- dragging slider further while it is in min/max positions have following glitches:
a) min position: slider is reduced by 1 step (or pixel), can even be pushed to width smaller that minimal
b) max position: slider and main view is "jumping" by 1 step (or pixel)
Large Beaver Apr 22, 2019 at 19:02
Thank you for the detailed review of my solution. I hope my work does not go unnoticed. I created an additional branch (, where I`ll fixing the founded bugs. Attention! Link not for the contest testers, please use
Windows 8/Chrome 73
Stacked, bars: top right bar has wrong width and hard to select
MBP 2018 15, Chrome, Mojave
Large Beaver Apr 24, 2019 at 20:31
reproducible in Chrome
Chrome 73
1) Last bar width is smaller than the rest. This is true for at least bar chart, stacked bar chart and area chart.
2) When dragging/resizing navigator bar and mouse leaves the chart area - dragging/resizing stops. Very annoying and unfriendly behavior.
Large Beaver Apr 21, 2019 at 13:26
Thank you for attention to my work. I reproduced it in Chrome, it's really bugs. I ll fix it after context ends.
Some wrongplaced subbars
Large Beaver Apr 22, 2019 at 19:07
Thank you for detailed issues. Yes it is stupid bug, filter cache not invalidated when zoom state changed. I hurried in deadline. Already fixed
Bars: wrong date selection
MBP 2018 15, Chrome, Mojave
Large Beaver Apr 24, 2019 at 20:30
Thanks, you are very attentive. It is bug.
Data filters: width no preserved and hence buttons jump from one line to another - bad UX
MBP 2018 15, Chrome, Mojave
Large Beaver Apr 24, 2019 at 20:32
I Agree it is no user friendly
Stacked: on hover selected bar changes with delay and tooltip info. See jumping stacked data
MBP 2018 15, Chrome, Mojave
Large Beaver Apr 24, 2019 at 20:33
Yes, reproduced
2Y: wrong min value. Chart hangs in the air
MBP 2018 15, Chrome, Mojave
Large Beaver Apr 24, 2019 at 20:36
Duplicated, already fixed. Big thanks for a detailed ux review.
No tooltip when selecting piece if pie
Xiao mi
Authors, please move my app's data one dir down. Nobody can view my app since it placed not at '/entry211/' and at '/entry211/build/'
Large Beaver Apr 18, 2019 at 07:54
Thank you for comment. Don't worry, my app without data at all) I think, if your app best then you will prized in any case. I ll review you app and leave comment latter. this my link
Deleted Account Apr 19, 2019 at 16:02
Very good!
Some fog on the top
Mi4/ Android
Large Beaver Apr 24, 2019 at 20:36
Wow, what browser are you using?
Preview: borders not rounded
MBP 2018 15, Chrome, Mojave
Large Beaver Apr 24, 2019 at 20:37
Hmm, it was required?
Nobody added any issues yet...