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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 11:47
— Overall performance is below average. 
— Scrolling, filtering and scaling are slow (graph #3). 
— Bonus goal is implemented, however animations are slow.
Samsung Galaxy J7 (2017), Android 8.1.0; iPhone 5S, iOS 12.1
Line charts must be started with local min Y.
Any OS version
Circles on the lines (selected value) in the night version don't match the color scheme.
Any OS version
No window resize support.
Desktop / Chrome 73 / Any OS version
When some btn activated, then we switch theme mode and btn has bg from previous theme
Xiaomi mi mix 2s
Long touch / long click functionality is not realized
Chrome 73
Stacked chart. Display incorrect data after zoom-in + uncheck line.
Mac os - safari, chrome.
Charts are very laggy in terms of performance.
Chrome 73 / Google Nexus 6p
0 on the left side has wrong color. On the right there is no 0 value at all.
Дмитрий Потапов Apr 17, 2019 at 13:46
Administrators Telegram, where my graphics? Yesterday I sent a zip archive, but I do not see my work in the list
mode change does not work correctly
Lines dots (circles) on preview that appear when you move the mouse behave incorrectly for the first chart when any of the lines is switched off, but at the same time works correctly in the second chart.
(When empty the tooltip is still displayed, but probably this one could be ignored.)
Chrome 73
It is impossible to select less than almost a month on daily graphs. Initial date range selected is almost half a year. (1 Apr to 30 Apr in the screenshot imply that the initial range should be final month)
Chrome 73
Percentage chart. Display incorrect data. Zoom-in + uncheck + zoom-out. After hover chart it's fixed, but after this hover pop-up has incorrect data too.
Mac os - safari, chrome.
In timeline (navigator) for pie chart there are only 6 days available.
Wrong dates in the title for pie chart.

The drag/resize functionality of the magnifier (search box of the navigator) has minor glitches.
Chrome 73
No tooltips and separation of sectors on hover or touch or click on the pie chart pieces.
Chrome 73
For single column chart in zoommed in mode the timeline (navigator) is still displayed, but the new buttons for new lines are not displayed.
Also the View button is displayed, but this is a minor thing and can be ignored, I think.
Chrome 73
The stacking of the stacked bars is upside down starting from the lowest values at the bottom and putting the higher values to the tops.
Chrome 73
Impossible to select in preview the extreme right value (sometimes couple of them - depends on the current range selected)
Chrome 73
No percentages displayed in the tooltip of the pointed position in stacked percentage chart
Chrome 73
Wrong format of the dates displayed in the title for zoommed in mode of any chart. (Probably a minor thing and could be ignored)
Chrome 73
Unable to select time range by dragging in the preview area (outside of the current window).
Issues with pie chart.
The functionality is broken when zooming in on dates at the beginning or at the end of the chart.

Glitches with main percentage chart tooltip when showing pie chart.

Very difficult (almost impossible) to enter zoomed mode for pie chart with mouse at the left half of the chart.
Chrome 73
The scaling of lines of y_scaled chart doesn't seem correct. The max value of one line should correlate with the max value of another one at the top on 100% date range.
Chrome 73
Issues with zoom in on last but one date of the chart for line charts and bar charts. The final date is impossible to select.
Nobody added any issues yet...