Opened 6 months ago

Last modified 2 months ago

#35137 assigned Cleanup/optimization

Collapsible error container elements do not indicate that they are interactive

Reported by: Denis Anuschewski Owned by: Abhijeet Singh
Component: Error reporting Version: dev
Severity: Normal Keywords:
Cc: Thibaud Colas, Tom Carrick, Sarah Abderemane, Abhijeet Singh Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: yes Patch needs improvement: yes
Easy pickings: no UI/UX: yes

Description (last modified by Denis Anuschewski)

On the debug page for a server error the collapsible elements in the traceback view do not clearly indicate that they are in fact interactive:

1) The little icon on the right corner is way too small I think and also far away from the element's inner content (see for a possible alternative).

2) The element does not stand out in a way that it indicates it's interactive. It could have e.g. a border to separate it from the background.

Also the elements are not selectable via keyboard and the tab button.


Attachments (2)

stacktrace-error.png (43.4 KB ) - added by Denis Anuschewski 6 months ago.
collapsibles.png (81.1 KB ) - added by Denis Anuschewski 2 months ago.

Download all attachments as: .zip

Change History (17)

by Denis Anuschewski, 6 months ago

Attachment: stacktrace-error.png added

comment:1 by Denis Anuschewski, 6 months ago

Description: modified (diff)

comment:2 by Denis Anuschewski, 6 months ago

Description: modified (diff)

comment:3 by Denis Anuschewski, 6 months ago

Description: modified (diff)
Type: Cleanup/optimizationBug

comment:4 by Natalia Bidart, 6 months ago

Cc: Thibaud Colas Tom Carrick Sarah Abderemane added
Component: UncategorizedError reporting
Triage Stage: UnreviewedAccepted
Type: BugCleanup/optimization
Version: 5.0dev

Accepting on the basis that I have used Django for more than 15 years and I did not know this existed!!!
I agree that improving the discoverability of this feature would certainly be a positive thing for the framework.

Denis, would you like to prepare a patch? I would suggest to first reach out to the Django Accessibility Team (via the Django forum) to agree on a proper accessible design fix. Thank you!

comment:5 by Denis Anuschewski, 6 months ago

Hey Natalia.

Thx, will do that.

Shout out to Thibaud Colas who 1st found this behaviour.

comment:7 by Thibaud Colas, 6 months ago

Note there are three separate issues here:

  1. Bug: the current implementation is unusable for keyboard and voice control users due to adding interactivity to list item elements.
  2. Somewhere between a bug and a usability fail: placing the "this is collapsible" signifier all the way to the right means it’s more or less impossible to spot for users of screen magnification
  3. And usability issue – it’s hard to understand this is interactive.

I’d recommend fixing them all at once by introducing a "toggle" button to the left of the line number, so we can solve the issue at hand without reinventing the current designs. That button will be focusable and can either have a visible "toggle" label or icon + tooltip, plus hover styles (see for example how GitHub does it).

comment:8 by Denis Anuschewski, 6 months ago

Another suggestion for a simple solution:

Adapt the icon for the collapsible link "Local vars" just under the gray error box (placed on the left of the line number just like Thibaud mentioned).
Plus implement a thin border to let the box stand out more.

comment:9 by Abhijeet Singh, 6 months ago


Have a look at this quick prototype
Notable Additions :

  • Hovering Messages
  • And a Button on the left side to indicate that the element is interactable and also accessible by the keyboard

Check it out on the discussion page:

Last edited 6 months ago by Abhijeet Singh (previous) (diff)

comment:10 by Abhijeet Singh, 6 months ago

Owner: changed from nobody to Abhijeet Singh
Status: newassigned

comment:11 by Abhijeet Singh, 6 months ago

Cc: Abhijeet Singh added
Has patch: set

comment:12 by Sarah Boyce, 4 months ago

Note that #35189 also deals with collapsible elements and accessibility concerns might be similar both (and might make sense to be reviewed together).

comment:13 by Sarah Boyce, 3 months ago

Needs tests: set
Patch needs improvement: set

comment:14 by Abhijeet Singh, 3 months ago

Hay! I just opened a Discord Thred to discuss the Patch Improvement, I would appreciate if you checked it out

by Denis Anuschewski, 2 months ago

Attachment: collapsibles.png added

comment:15 by Denis Anuschewski, 2 months ago

Hey there.

In the meantime I came up with my own approach. You can check out my PR if you like:

The collapsible code line elements are now rendered as details/summary tags and are slightly more highlighted by having a thin border plus a differently colored icon (+/-) which indicates toggling functionality.

Some javascript was needed for adjusting the behavior of the details/summary tags as they did not allow the center code line element to be in the middle after opening (it always pops up on top). But it's not much and the end result works and feels the same as with native details and summary tags. Plus the HTML markup is now more semantic.

With the new changes you can also "step" through the elements by clicking on tab/shift+tab and easily open and close them without losing focus.

Keyboard ninjas will hopefully appreciate this ⌨️🥷


Last edited 2 months ago by Denis Anuschewski (previous) (diff)
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