[EPIC] Fix the various longstanding bugs in the lazy loaded image formatter
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	Jdlrobson
	Jul 31 2019, 8:27 PM

Description

The lazy loading image feature has been neglected over the course of the last year and we have several bugs (listed) that should be looked at. All bugs have estimates - we just need to work out when to do them.

Acceptance criteria

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All subtasks have been resolved.

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Status	Assigned	Task
Resolved	ovasileva	T229472 [EPIC] Fix the various longstanding bugs in the lazy loaded image formatter
Open	None	T197188 Lazy loaded images: MobileFormatter should take into account mobile image dimension adjustments
Resolved	ovasileva	T209183 Lazy loaded images: Copy `usemap` attribute for image maps
Resolved	ovasileva	T199351 Lazy loaded images: Lazily loaded inline images cause reflow - should retain other classes such as `thumbborder`
Resolved	Jdrewniak	T207929 Lazy loaded images: Styles are not copied across from img tags when an image is lazy loaded
Resolved	Jdrewniak	T246838 Avoid SEO performance and user experience penalties by addressing our handling of lazy loaded images using IntersectionObserver
Duplicate	Jdlrobson	T246767 Implement Tap to show for lazy loaded images without MutationObserver - Scrolling on a Kai OS mobile device can be slow on articles with lazy loading
Duplicate	None	T246866 Re-work lazy loading of images
Resolved	ovasileva	T133085 Graphs are broken by MobileFrontend's lazy loading image transformer

Event Timeline

Jdlrobson created this task.Jul 31 2019, 8:27 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJul 31 2019, 8:27 PM

Jdlrobson renamed this task from [Tracking] Various longstanding bugs in the lazy loaded image formatter to [Tracking] Fix the various longstanding bugs in the lazy loaded image formatter.Jul 31 2019, 8:28 PM

Jdlrobson triaged this task as Medium priority.

Jdlrobson added subtasks: T197188: Lazy loaded images: MobileFormatter should take into account mobile image dimension adjustments, T209183: Lazy loaded images: Copy `usemap` attribute for image maps, T199351: Lazy loaded images: Lazily loaded inline images cause reflow - should retain other classes such as `thumbborder`, T207929: Lazy loaded images: Styles are not copied across from img tags when an image is lazy loaded.

Jdlrobson updated the task description. (Show Details)

Jdlrobson mentioned this in T207929: Lazy loaded images: Styles are not copied across from img tags when an image is lazy loaded.

Jdlrobson mentioned this in T199351: Lazy loaded images: Lazily loaded inline images cause reflow - should retain other classes such as `thumbborder`.

Jdlrobson mentioned this in T197188: Lazy loaded images: MobileFormatter should take into account mobile image dimension adjustments.Jul 31 2019, 8:30 PM

Jdlrobson mentioned this in T209183: Lazy loaded images: Copy `usemap` attribute for image maps.

Jdlrobson moved this task from Epics/Goals to Product Owner Backlog on the Web-Team-Backlog board.Aug 1 2019, 8:17 PM

Jdlrobson renamed this task from [Tracking] Fix the various longstanding bugs in the lazy loaded image formatter to [EPIC] Fix the various longstanding bugs in the lazy loaded image formatter.Aug 5 2019, 2:54 PM

MBinder_WMF edited projects, added Web-Team-Backlog (Needs Product Owner Decisions); removed Web-Team-Backlog.Aug 7 2019, 4:56 PM

Jdlrobson claimed this task.Aug 7 2019, 5:48 PM

Jdlrobson moved this task from Needs Product Owner Decisions to Needs Prioritization on the Web-Team-Backlog board.

Jdlrobson edited projects, added Web-Team-Backlog; removed Web-Team-Backlog (Needs Product Owner Decisions).

Per our conversation today in our 1-on-1 there are 4 subtasks on this that need prioritisation. I'd like to wrap up this work before we start new adventures such as desktop refresh so these don't linger any more.

ovasileva moved this task to Epics/Goals on the Web-Team-Backlog board.Feb 17 2020, 2:12 PM

Jdlrobson added a subtask: T246838: Avoid SEO performance and user experience penalties by addressing our handling of lazy loaded images using IntersectionObserver.Mar 10 2020, 6:20 PM

Jdlrobson mentioned this in T222604: Kartographer maps with "type": "Feature" and a image in the description is not shown in mobile view.Mar 17 2020, 4:38 PM

Jdlrobson added a subtask: T133085: Graphs are broken by MobileFrontend's lazy loading image transformer.Apr 1 2020, 9:55 PM

ovasileva closed subtask T133085: Graphs are broken by MobileFrontend's lazy loading image transformer as Resolved.Apr 10 2020, 9:32 AM

Jdrewniak closed subtask T246838: Avoid SEO performance and user experience penalties by addressing our handling of lazy loaded images using IntersectionObserver as Resolved.Jun 2 2020, 5:01 PM