JavaScript Chart – Developer Challenges

Info

Author

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.

Voting

1742

Issues

Fair Quokka May 8, 2019 at 12:59

— Overall performance is poor.
— The screen slightly jitters when scaling (the attached video #1).
— The graphs are broken when the zoom is applied (the attached video #2).
— Values on Y-scale of the fifth graph are not correct.
— Bonus goal is completed, but pie chart blinks when selecting the certain part. Sloppy on zooming in and out.

0:10

0:26

Samsung Galaxy J7 (2017), Android 8.1.0; iPhone 5S, iOS 12.1

Ilya Pavluhin Apr 22, 2019 at 09:47

Looks good. I have found a couple of little issues but works stable in common.

Little Chameleon Apr 22, 2019 at 09:51

Thanks!

Large Beaver Apr 22, 2019 at 20:17

No x-axis animations but generally works well and all bonus goals completed. Voted

Windows 8/Chrome 73

Fancy Hare Apr 22, 2019 at 21:12

Timeline (navigator) is displayed for single column chart in zoomed mode.

But overall the work is not bad. So unfair that is has received so many down-votes.

Chrome 73

Merry Ant Apr 17, 2019 at 14:39

Don't work in IE11

Win10

Little Chameleon Apr 22, 2019 at 09:51

Thanks, I should add some polyfills for IE, but haven't time to test it

Merry Ant Apr 17, 2019 at 14:40

Crash after start dragging chart's preview in Edge

Win10

Crazy Pug Apr 19, 2019 at 13:50

Bars, stacked: wrong most right value date for bar (or missing bar)

MBP 2018 15, Mojave, Chrome

Mikhail Apr 17, 2019 at 13:23

While animation is nice there's obviously should be no moments when graph is drawn completely out of viewing window and you have to wait for it to fall/rise.

0:09

Redmi Note 3 Pro / Chrome 73.0.3683.90 / Android 7.1.1

Mikhail Apr 17, 2019 at 13:27

During panning graph peaks might be rendered differently (look at graph area I touched at start of video — there's sharp peak that appears as less sharp after panning)

0:20

Redmi Note 3 Pro / Chrome 73.0.3683.90 / Android 7.1.1

Mikhail Apr 17, 2019 at 13:34

Processing input is tied to drawing. The longer drawing takes, the longer input latency would be, which is unacceptable, especially for mobile users where not that much processing power is present and expectations on touch to response latency is quite high.

0:21

Redmi Note 3 Pro / Chrome 73.0.3683.90 / Android 7.1.1

Witty Owl Apr 19, 2019 at 11:33

incorrect work after the landscape mode, the graph is cropped and circles are completely displayed

Little Chameleon Apr 22, 2019 at 09:48

I agree, you should refresh page after change landscape. I shouldn't time to implement correct resize handler.

Fancy Hare Apr 24, 2019 at 18:26

The navigation on pie chart timeline is not in 1-day steps as required in the contest video sample.

0:40

Chrome 73

Little Chameleon Apr 25, 2019 at 09:09

Agree, I don't notice that feature :(

Fancy Hare Apr 24, 2019 at 18:33

It is unclear how the values of the pie chart sectors are calculated. I don't see they are either a sum or a median of the selected dates.

And apparently it is impossible to select just the 6th of April on the pie chart timeline.

1:29

Chrome 73

Little Chameleon Apr 25, 2019 at 09:19

Good catch. impossible to select 6th April - It is bug related to wrong last index calculation. In common (except last day) in pie chart calculated average value of selected period.

Fancy Hare Apr 24, 2019 at 18:40

Some usability problems with app responsiveness.

1:06

Chrome 73

Little Chameleon Apr 25, 2019 at 09:12

Agree, i haven't time to implement resize handler correctly

Crazy Pug Apr 24, 2019 at 20:47

Line charts: wrong min value

MBP 2018 15, Chrome, Mojave

Crazy Pug Apr 24, 2019 at 20:49

Percentage: no "100" value on Y axis. Values not by design, should be 25/50/...

MBP 2018 15, Chrome, Mojave