Maniphest T416258

Parsoid mobile views do not expand sections when following hash fragment links
Closed, ResolvedPublic3 Estimated Story PointsBUG REPORT
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Description

Steps to replicate the issue (include links if applicable):

Use or emulate a mobile browser
Visit https://en.wikipedia.org/wiki/List_of_Hollyoaks_characters_introduced_in_2018?useparsoid=1#Breda_McQueen
In another tab visit https://en.wikipedia.org/wiki/List_of_Hollyoaks_characters_introduced_in_2018?useparsoid=0#Breda_McQueen

What happens?:

In legacy parser: the Breda_McQueen section is expanded
In Parsoid: the Breda_McQueen section is NOT expanded

What should have happened instead?:

In the Parsoid version this section should be expanded on page view.
The expansion should also occur on both for subsections e.g. https://en.wikipedia.org/w/index.php?title=List_of_Hollyoaks_characters_introduced_in_2018&useparsoid=1#Storylines

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	SectionCollapsing: Auto-expand sections based on hash fragments	mediawiki/extensions/MobileFrontend	master	+282 -7

Customize query in gerrit

Event Timeline

Jdlrobson-WMF created this task.Feb 2 2026, 10:21 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptFeb 2 2026, 10:21 PM

Jdlrobson-WMF triaged this task as High priority.Feb 2 2026, 10:21 PM

Jdlrobson-WMF renamed this task from Parsoid mobile views do not expand sections when following to Parsoid mobile views do not expand sections when following hash fragment links.Feb 2 2026, 10:24 PM

SherryYang-WMF moved this task from Needs Refinement to Sprint 2 (Feb 3 - 16) Q3 25/26 on the Reader Growth Team board.Wed, Feb 4, 4:37 PM

SherryYang-WMF edited projects, added Reader Growth Team (Sprint 2 (Feb 3 - 16) Q3 25/26); removed Reader Growth Team.

egardner set the point value for this task to 3.Wed, Feb 4, 6:12 PM

Jdlrobson-WMF moved this task from Backlog to Blockers on the Readers Essential Work 2025 (WE6.3.4 Fix bugs within the reading experience across platforms for Parsoid Read Views) board.Wed, Feb 4, 8:54 PM

egardner claimed this task.Wed, Feb 4, 9:32 PM

Change #1236838 had a related patch set uploaded (by Eric Gardner; author: Eric Gardner):

[mediawiki/extensions/MobileFrontend@master] SectionCollapsing: Auto-expand sections based on hash fragments

https://gerrit.wikimedia.org/r/1236838

gerritbot added a project: Patch-For-Review.Wed, Feb 4, 9:41 PM

egardner moved this task from Committed to Code Review on the Reader Growth Team (Sprint 2 (Feb 3 - 16) Q3 25/26) board.Wed, Feb 4, 9:42 PM

Test wiki created on Patch demo by EGardner (WMF) using patch(es) linked to this task:
https://d026251709.catalyst.wmcloud.org/w/

Check out https://d026251709.catalyst.wmcloud.org/w/index.php?title=List_of_Hollyoaks_characters_introduced_in_2018#Ron – should be open on pageload now.

Jdlrobson-WMF moved this task from Untriaged to MobileFormatter on the MobileFrontend board.Tue, Feb 10, 7:19 PM

Jdlrobson-WMF edited projects, added MobileFrontend (MobileFormatter); removed MobileFrontend.

There is still room for improvement with the subheadings
e.g. http://localhost:8888/w/index.php?title=List_of_Hollyoaks_characters_introduced_in_2018&useparsoid=1#Storylines / https://d026251709.catalyst.wmcloud.org/w/index.php?title=List_of_Hollyoaks_characters_introduced_in_2018#Storylines )

That said I don't think we should spend more time on this until we are clearer about the future of section collapsing by default in Parsoid. The experience is on par with legacy and I'd suggest we can create a follow up ticket to smoothen the experience for sub sections and revisit that later.

The importance thing is sections /are/ displayed now.

Jdlrobson-WMF moved this task from Code Review to QA on the Reader Growth Team (Sprint 2 (Feb 3 - 16) Q3 25/26) board.Fri, Feb 13, 10:27 PM

Change #1236838 merged by jenkins-bot:

[mediawiki/extensions/MobileFrontend@master] SectionCollapsing: Auto-expand sections based on hash fragments

https://gerrit.wikimedia.org/r/1236838

ReleaseTaggerBot added a project: MW-1.46-notes (1.46.0-wmf.16; 2026-02-17).Fri, Feb 13, 11:00 PM

Maintenance_bot removed a project: Patch-For-Review.Fri, Feb 13, 11:31 PM

SherryYang-WMF moved this task from Sprint 2 (Feb 3 - 16) Q3 25/26 to Sprint 3 (Feb 17 - Mar 2) Q3 25/26 on the Reader Growth Team board.Tue, Feb 17, 5:42 PM

SherryYang-WMF edited projects, added Reader Growth Team (Sprint 3 (Feb 17 - Mar 2) Q3 25/26); removed Reader Growth Team (Sprint 2 (Feb 3 - 16) Q3 25/26).

egardner moved this task from Committed to QA on the Reader Growth Team (Sprint 3 (Feb 17 - Mar 2) Q3 25/26) board.Tue, Feb 17, 5:43 PM

egardner moved this task from QA to Signoff on the Reader Growth Team (Sprint 3 (Feb 17 - Mar 2) Q3 25/26) board.Thu, Feb 19, 11:26 PM

egardner closed this task as Resolved.Thu, Feb 19, 11:42 PM