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

3548

Issues

Fair Quokka May 8, 2019 at 14:37

— The app is not optimized for mobile devices
— 3 distorted graphs are displayed on the page.
— 5 seconds delay on launch.
— The graphs take the entire width of the page when viewed from desktop browsers.
___
Upd.: this refers to the first one (should not stay as a separate issue, sorry for the confusion).

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

Able Beaver May 9, 2019 at 21:59

Thanks!
Agree with all issues, but can you explain what you mean, please:
-3 distorted graphs are displayed on the page.

Upd.: Thanks! Please, clarify whether the bonus task is credited. Judging by your reports, you do not write about it if it's not implemented.

Upd.: Out of competition: partialy decided it here: http://tchart.6te.net/

Fancy Hare Apr 24, 2019 at 18:00

The timeline (navigator) is not updated on switching on/off the buttons on any chart

0:51

Chrome 73

Able Beaver Apr 24, 2019 at 19:40

Thanks! You are right!

Fancy Hare Apr 18, 2019 at 15:26

Very low performance of drag / resize of the bars chart timeline (navigator) magnifier, especially on mobile device. I think this can be due to a huge number of DOM nodes used to create bars.

0:40

Chrome 73 on Desktop; Chrome on Nokia 6 Android 9

Able Beaver May 9, 2019 at 22:44

Thanks for detail report!

Upd.: You are right! So many DOM and listeners very bad for app's performance. Beside, not optimal drawing of bars curve. Decided it here: http://tchart.6te.net/

Crazy Pug Apr 24, 2019 at 22:19

Stacked, percentage: when toggle data filters poor performance on powerful Macbook Pro 2018

MBP 2018 15, Chrome, Mojave

Crazy Pug Apr 24, 2019 at 22:15

Line chart 2Y: when unselect data filter - data stays in preview

MBP 2018 15, Chrome, Mojave

Crazy Pug Apr 24, 2019 at 22:17

Stacked, bars: White lines between bars

MBP 2018 15, Chrome, Mojave

Able Beaver May 9, 2019 at 22:44

Thanks for this issue!
Decided it here: http://tchart.6te.net/

Crazy Pug Apr 24, 2019 at 22:20

Percentage: can move trimmer outside of preview

MBP 2018 15, Chrome, Mojave

Able Beaver Apr 24, 2019 at 22:27

Thanks! Haven't idea how you can do this) But its a bug and need to be repair

Crazy Pug Apr 24, 2019 at 22:22

Stacked: data rendered on preview even when it's unchecked

MBP 2018 15, Chrome, Mojave

Cuddly Owl Apr 17, 2019 at 15:29

- no smooth animation between values
- no text animation
- no spaces in long numbers
- old design of minimap
- unusable button in plot #4

Able Beaver May 9, 2019 at 22:29

Thanks for the significant comments!

Upd.: Some issues were repaired here: http://tchart.6te.net/

Fancy Hare Apr 18, 2019 at 14:49

Wrong timeline (navigator) for pie chart

Chrome 73

Able Beaver May 9, 2019 at 21:56

Thanks for this issue!
Decided it here: http://tchart.6te.net/

Fancy Hare Apr 18, 2019 at 14:51

Design of the switched off buttons is from stage 1

Chrome 73

Fancy Hare Apr 18, 2019 at 14:53

No tooltip and separation for the sectors of the pie chart

Chrome 73

Able Beaver May 9, 2019 at 21:56

Thanks for this issue!
Partialy decided it here: http://tchart.6te.net/

Fancy Hare Apr 18, 2019 at 14:56

No percentages in the tooltip for stacked percentage chart

Chrome 73

Fancy Hare Apr 18, 2019 at 15:04

Ugly line widths for line charts

0:49

Edge on Windows 10

Large Beaver Apr 18, 2019 at 15:45

Invalid container size

Xiaomi mi3

Able Beaver Apr 19, 2019 at 06:30

Hi, brother Beaver! Thanks for your comment!

Fancy Hare Apr 24, 2019 at 18:07

The following is not particularly an issue, but an observation - might be helpful if you are going to improve your app in future:

When entering the zoomed mode and then going back out into the standard one, I can see that the overview.json file is fetched again. That doesn't really make sense, I think. It would be possible to keep the generated standard chart for the whole session. And would be a good idea to cache the daily json files as well once they are fetched.

0:33

Able Beaver Apr 24, 2019 at 19:37

Thanks! Good idea!

Fancy Hare Apr 24, 2019 at 18:13

There are some small usability problems with app responsiveness. First of all - it is not responsive at all. But also when you try to narrow the window, there is no horizontal scrollbar and the right part of the chart becomes unreachable. And at the same time the timeline (navigator) overlay gets confused a bit.

1:02

Chrome 73

Crazy Pug Apr 24, 2019 at 22:14

Preview trimmer not rounded and has no white vertical lines as in design reference

MBP 2018 15, Chrome, Mojave

Able Beaver May 9, 2019 at 21:57

Thanks for this issue!
Decided it here: http://tchart.6te.net/

Crazy Pug Apr 24, 2019 at 22:16

Stacked: red data not visible

MBP 2018 15, Chrome, Mojave

Able Beaver Apr 24, 2019 at 22:20

Thanks for your comment! Red data not visible, because absolute value of data is significent less than other in one time moment. It's not a bug.