Document wgUseLegacyMediaStyles
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	TheDJ
	Jan 10 2024, 10:10 AM

Description

The support channels are getting questions about why some of their templates for thumbnails are breaking. This is because they copy examples from Wikipedia, which still rely on tright etc.

On wikipedia, this works because the styles for the old thumbnails are still included. This is being done by wgUseLegacyMediaStyles it seems. This configuration setting defaults to false, but is undocumented on Mediawiki.org and thus not discoverable for most people. The setting also isn't mentioned in any of the release notes as far as I could quickly determine.

We should rectify this.

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		Status	Subtype	Assigned	Task
		Open		ABreault-WMF	T318433 Templates (and extensions) that mimic parser media output need migration to new structure
		Open		None	T354740 Document wgUseLegacyMediaStyles

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TheDJ created this task.Jan 10 2024, 10:10 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJan 10 2024, 10:10 AM

Made a start at https://www.mediawiki.org/wiki/Manual:$wgUseLegacyMediaStyles
Stills needs adding of version info etc.

TheDJ added a parent task: T318433: Templates (and extensions) that mimic parser media output need migration to new structure.Jan 10 2024, 10:24 AM

TheDJ updated the task description. (Show Details)Jan 10 2024, 10:49 AM

rMWf99dc83677e9: Add a config to stop shipping the legacy media styles was added in 1.41 and not backported.

Reedy added a project: MediaWiki-Parser.Jan 10 2024, 5:59 PM

After my table stopped floating right:

{| class="wikitable floatright mw-collapsible mw-collapsed" style="width:20em"

I added the following code - suggested by @alistair3149 - to my MediaWiki:Common.css

.floatright {
    margin: 0 0 0.5em 0.5em;
    clear: right;
    float: right;
}

.floatleft {
    margin: 0 0.5em 0.5em 0;
    float: left;
    clear: left;
}

This fixed my problem.
So I guess that anyone experiencing their tables not floating anymore, could try this out.

Izno mentioned this in T366968: floatleft/right classes not documented great.Jun 7 2024, 10:43 PM

Izno added a project: MediaWiki-User-Interface.

Document wgUseLegacyMediaStylesOpen, Needs TriagePublicActions

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Document wgUseLegacyMediaStyles
Open, Needs TriagePublic
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