Opened 2 months ago

Closed 7 weeks ago

#35798 closed Bug (fixed)

Admin sidebar still flashes when page loads

Reported by: Mario Munoz Owned by: Gavin Wahl
Component: contrib.admin Version: 5.0
Severity: Normal Keywords:
Cc: Triage Stage: Ready for checkin
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: yes

Description

This new ticket is based on https://code.djangoproject.com/ticket/31641 which had been closed previously.

Currently, there is a <script src="{% static 'admin/js/nav_sidebar.js' defer %}"></script> tag within the <head> element of the base template. This means that sometimes the sidebar renders before the script runs, which sometimes causes a flash/flicker when you reload the page.

I was able to reproduce this locally. To do this, I needed to hide the sidebar, then show again, then reload the browser. Upon subsequent reloads, there would be an occasional flicker.

Change History (6)

comment:1 by Mario Munoz, 2 months ago

When moving the script tag to be listed in the nav_sidebar.html (after the code), it will no longer run the script until after the sidebar has rendered.

I reproduced the steps I used to verify the flicker was present, but after this change, I could no longer reproduce the effect. It seems to have fixed the issue.

I'm not sure if there is any testing to be set up for this.

comment:3 by Thibaud Colas, 2 months ago

Triage Stage: UnreviewedAccepted

Confirm the issue from #31641 is still present.

comment:4 by Sarah Boyce, 7 weeks ago

Owner: changed from Mario Munoz to Gavin Wahl

comment:5 by Sarah Boyce, 7 weeks ago

Triage Stage: AcceptedReady for checkin

comment:6 by Sarah Boyce <42296566+sarahboyce@…>, 7 weeks ago

Resolution: fixed
Status: assignedclosed

In 747b417:

Fixed #35798, Refs #31641 -- Prevented admin navigation sidebar loading flicker.

Thank you to Mario Munoz and Thibaud Colas for the testing and review.

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