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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 Quokka May 8, 2019 at 13:35
— Overall poor performance. 
— The design does not comply with the guidelines.
— Y-scale always starts from zero. 
— Dates are overlapped.
— The app is slow when filtering, scrolling and scailing all the graphs.
— The graphs take the entire width of the page when viewed from desktop browsers.
Samsung Galaxy J7 (2017), Android 8.1.0; iPhone 5S, iOS 12.1
Line charts: not start from min value
MBP 2018 15, Chrome, Mojave
Design guidelines are not met.
Chrome 73
Earnest Falcon Apr 17, 2019 at 16:00
I have no time to meet design guides (
so many date labels
Earnest Falcon Apr 17, 2019 at 15:59
Unfortunately, I have fixed this issue after result submission. This is because count of labels depends of count of points in x axis(in fixed version this calculates by count of labels with max width)
No bonus tasks for any chart. Not an issue, if not planned.
Chart #2: The Y-scale on line graphs should start with the lowest visible value.
Float value showed for Y labels (see screenshot)
Earnest Falcon Apr 19, 2019 at 11:45
That’s right. Float value issue fixed next day after result submission 🤷🏿‍♂️
Hm... looks confusing on mobiles
Iphone x
Earnest Falcon Apr 20, 2019 at 16:29
Sorry. Initially, I tested on desktop, and I have little experience to develop for mobiles.
The 'views' button is displayed for single column chart. But that is a very small issue, should probably be ignored.

Sorry you didn't have enough time to finish with the design, but I appreciate your efforts. No dislike from me.
Chrome 73
Earnest Falcon Apr 22, 2019 at 12:45
Thanks. It’s very interesting contest task. I’ll continue work on it in future, when I will get free time to do performance experiments, and I’ll fix all these issues.
Stacked, bars, percentage: main chart faded even when not hovered
MBP 2018 15, Chrome, Mojave
Tooltip: data should be in rows
MBP 2018 15, Chrome, Mojave
Bars: when moving cursor - tooltip is not moving
MBP 2018 15, Chrome, Mojave
Preview: doesn't start from min value
MBP 2018 15, Chrome, Mojave
Nobody added any issues yet...