Bugs in "Live preview" feature (tracking)
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Authored By

	saper
	Aug 11 2012, 9:15 PM

Description

Conversion of this tracking task to a project is discussing at T192074

This bug tracks all problems related to the "Live preview" feature that can be enabled in the preferences under "Editing".

RFC (later withdrawn): https://www.mediawiki.org/wiki/Requests_for_comment/Live_preview

URL: https://www.mediawiki.org/wiki/Manual:Live_preview

Details

Reference: bz39272

Related Objects
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Status	Subtype	Assigned	Task
Resolved		Jdforrester-WMF	T60082 TimedMediaHandler injects too many JavaScript configuration variables
Declined		None	T98969 Video files do not play through the embedded player on EducationProgram and other fake pages
Resolved		TheDJ	T51751 Ajax "This file already exists" doesn't load image related js (e.g. from TMH)
Open		None	T41272 Bugs in "Live preview" feature (tracking)
Resolved		None	T10618 Live Preview doesn't reload Edit Summary preview; no way to use standard preview when Live Preview is enabled
Resolved		None	T27830 LivePreview makes page "jump"
Resolved		TheDJ	T26134 LivePreview: styles added by extensions are missing
Resolved		Krinkle	T35399 LivePreview: Re-run wikipage content handlers (jquery.makeCollapsible, jquery.tablesorter, ..) after preview content is loaded
Resolved		None	T41273 "Show changes" should not be incorrectly displayed in the Live Preview state
Open	Feature	None	T41874 Live preview should not scroll (or there should be an option to disable the scrolling)
Resolved		None	T53770 TemplateData styles are missing on live preview
Resolved		None	T43655 User script preview do not work if "tog-uselivepreview" is enabled
Resolved		TheDJ	T55918 Collapsible lists on edit page footer no longer collapsible after live preview is used
Resolved		matmarex	T45981 Live preview should be disabled if it can't preview the current content (user scripts specifically)
Resolved		Fomafix	T61015 Show DISPLAYTITLE on livepreview
Resolved		Fomafix	T56437 Table of contents interaction should be rebound on livepreview
Resolved		Ltrlg	T53029 livePreview make 'Language settings' icon disappear
Resolved		Krinkle	T32713 Add mw.hook event for wikipage content ready
Resolved		Krinkle	T25580 Implement JavaScript mw.hooks framework
Open		None	T71108 LivePreview doesn't allow interaction with page content outside of #wikiPreview (it is not passed to mw.hook)
Resolved		Krinkle	T53583 Add more mw.hook events for wikipage: diff, categories etc.
Resolved		TheDJ	T55327 Live preview leaves min-height block when previewing changes
Resolved		Fomafix	T62030 toc hide on live preview doesn't work anymore
Resolved		Fomafix	T62036 LivePreview: Wrong skin when using useskin
Resolved		TheDJ	T74675 Dynamically loading TimedMediaHandler for new content (preview)
Resolved		TheDJ	T60085 TimedMediaHandler should not add start-up scripts
Resolved		TheDJ	T75618 "Script error" is not clickable when using MediaWiki's live-preview feature.
Resolved		Fomafix	T84836 LivePreview: Since 1.25wmf12 the preview of the summary does not get updated on "Show changes"
Resolved		TheDJ	T84877 LivePreview: Since 1.25wmf12 in 'section=new' mode the section header is not shown
Duplicate		None	T84883 Pressing "Show changes" doesn't show "Preview of edit summary"
Resolved		TheDJ	T78709 New improved LivePreview incompatible with ProofreadPage's fancy forms for Index: namespace pages
Resolved		Fomafix	T78838 LivePreview: no changes reflected on preview/diff when using CodeEditor
Resolved		None	T78834 LivePreview: duplicate 'templates used on this page' list
Duplicate		None	T86697 Live preview does not update page status indicators
Resolved		Fomafix	T87557 LivePreview does not show page status indicators
Resolved		Fomafix	T103661 Reimplement Sanitizer::escapeId in JavaScript
Resolved		Fomafix	T85784 LivePreview should not replace title message with displaytitle value in firstHeading
Resolved		Fomafix	T85531 LivePreview: Preview of a redirect is not shown as a redirect
Resolved		Fomafix	T88117 Update HTML title with displaytitle on live preview
Resolved		Fomafix	T89941 LivePreview should not show edit section buttons
Resolved		TheDJ	T90490 LivePreview should give feedback when failing
Resolved		TheDJ	T90808 With MathJax and live preview enabled, math is displayed properly only the first time you click "preview" in a new article
Resolved		TheDJ	T90851 LivePreview fires wikipage.content hook before attaching content, which breaks some scripts
Duplicate		None	T91046 Parser profiling data should remain collapsible when using LivePreview
Resolved		TheDJ	T91167 LivePreview does not show Preview header nor preview warning
Declined		Krinkle	T95711 LivePreview: Page heading for "Creating" should support parser functions
Resolved		TheDJ	T98656 "Use live preview" option does not show Graphs
Resolved		TheDJ	T92944 Live preview should process JSConfigVars
Resolved		Anomie	T67015 API: Add jsconfigvars to action=parse
Resolved		Anomie	T76728 Clean up ApiResult and ApiFormatXml, create new formatversion
Resolved		Anomie	T85236 Better unit testing for ApiFormat*
Resolved		EBernhardson	T90745 Flow ApiFlowModerateTopicTest::testModerateTopic() assumes ApiResult will pass through arbitrary objects
Resolved		Anomie	T98083 add checkbox to ApiSandbox to use formatversion=2
Resolved		Anomie	T98086 improve RELEASE-NOTES-1.25 for formatversion=2 change
Open		None	T212069 API action=wbgetentities does not handle formatversion=2
Open		None	T101809 live preview displays category page content below subcategories and files
Resolved		Nardog	T102286 Live Preview does not show the "Templates used in this preview" when section-editing
Resolved	BUG REPORT	Fomafix	T105214 Preview shows wikitext instead of page title on test.wikipedia.org
Open		None	T113882 Live Preview adds an empty "in other languages" section in Vector
Invalid		Aklapper	T123061 Live preview does not display map (from Mapframe template) on English wikivoyage
Open		None	T145778 LivePreview "show changes" does not update or hide the category preview
Resolved		Fomafix	T149816 LivePreview substitutes $$ by $ in summary preview
Resolved		Jdforrester-WMF	T171156 Live preview does not show the preview of the summary anymore
Resolved		Jdforrester-WMF	T171176 Rename the "live preview" feature to reflect what it is (it's inline, not live)
Open		None	T173792 ParserMigration extension is incompatible with LivePreview
Duplicate		None	T176558 AJAX "Show changes" doesn't work when creating a page: "TypeError: response[0].query.pages[0].revisions is undefined"
Resolved		Daimona	T109166 Live preview "Show changes" indicates no changes in on new pages
Open		None	T184466 Live preview doesn’t use new versions of templates embedded in themselves
Resolved		Fomafix	T185683 Add uselang parameter to live preview diff requests
Resolved		TheDJ	T190120 Parse warnings not visible with live preview
Open	Feature	None	T229615 Add support for live preview feature on multi-content revision edit
Duplicate	BUG REPORT	None	T260500 Live preview fails to prevent itself from executing when previewing a user CSS/JS more than once
Resolved		Nardog	T186390 Javascript preview feature broken when live previews are enabled
Resolved	BUG REPORT	Daimona	T284625 Live preview should respect user's language variant setting
Resolved		Samwilson	T117549 Do not generate warning on parameter `variant` for API requests
Resolved		eranroz	T266738 Diff for Lua code module should always have LTR dir when using the inline preview tool
Resolved	BUG REPORT	Daimona	T292362 Signatures and substitutions remain unparsed in live diff
Resolved		Daimona	T293022 LivePreview doesn't work with ProofreadPage pages
Resolved		Fomafix	T293307 Header of diff in the editor missing when using live preview
Resolved	BUG REPORT	Fomafix	T293597 Live Preview: "Show changes" does not reset the diff area when there are no differences
Resolved	BUG REPORT	Nardog	T293892 Live preview fails when section=new&nosummary=1
Open		None	T293930 Support live diff for creating a new section
Open	BUG REPORT	None	T297049 Live diff appears with big white space when run on top of a server-provided empty diff
Resolved	BUG REPORT	Jdlrobson	T300814 Live preview doesn't work with Vector 2022 skin
Open	BUG REPORT	None	T309451 Live preview shows incorrect proofread status

Event Timeline

There are a very large number of changes, so older changes are hidden. Show Older Changes

In T41272#1275159, @Yurik wrote:

Should we make this bug into a project? Would be much easier for the people who file new bugs to find this (they simply type "live" in the project - at least that's what i did at first). Also would allow us to prioritize which bugs need to be addressed first

CC @Aklapper

TheDJ closed subtask T75618: "Script error" is not clickable when using MediaWiki's live-preview feature. as Resolved.May 11 2015, 11:50 AM

TheDJ closed subtask T98656: "Use live preview" option does not show Graphs as Resolved.

In T41272#1275281, @Ricordisamoa wrote:

In T41272#1275159, @Yurik wrote:

Should we make this bug into a project? Would be much easier for the people who file new bugs to find this (they simply type "live" in the project - at least that's what i did at first). Also would allow us to prioritize which bugs need to be addressed first

If this is wanted (is there consensus?), anyone with batch edit permissions can do so:
https://www.mediawiki.org/wiki/Phabricator/Project_management/Tracking_tasks
However for tracking such requests, a dedicated task under Project-Admins is more likely to be found.

TheDJ closed subtask T55918: Collapsible lists on edit page footer no longer collapsible after live preview is used as Resolved.May 25 2015, 8:35 AM

I was going to add a bug, but clearly this is just a lack of feature at the moment:

When I use live preview section editing does not list transclusions.

It works fine when I edit anonymously, thus not using live preview, and when I edit whole pages (and occasionally when I've had a page reload, like after an attempted save that failed due to a "loss of session data", but I couldn't get it to work by "forgetting to add an edit summary").

You can see my attempts at determining the problem here: https://en.wikipedia.org/w/index.php?title=User_talk%3AMarkhurd%2FSandbox&type=revision&diff=664666744&oldid=646644087 (when I thought it was working sometimes).

I note T2878 shows this has been a long-running issue and was "in flux" itself (outside of live preview) as late as May 2014.

Aklapper added a subtask: T101809: live preview displays category page content below subcategories and files.Jun 9 2015, 9:51 AM

Quiddity added a subtask: T102286: Live Preview does not show the "Templates used in this preview" when section-editing.Jun 12 2015, 8:13 PM

TheDJ added a subtask: T105214: Preview shows wikitext instead of page title on test.wikipedia.org.Jul 9 2015, 3:14 PM

TheDJ closed subtask T74675: Dynamically loading TimedMediaHandler for new content (preview) as Resolved.Aug 7 2015, 7:00 PM

TheDJ closed subtask T74675: Dynamically loading TimedMediaHandler for new content (preview) as Resolved.

TheDJ reopened subtask T74675: Dynamically loading TimedMediaHandler for new content (preview) as Open.Aug 7 2015, 7:03 PM

Aklapper added a subtask: T109166: Live preview "Show changes" indicates no changes in on new pages.Aug 15 2015, 10:22 AM

Ciencia_Al_Poder added a subtask: T113882: Live Preview adds an empty "in other languages" section in Vector.Sep 27 2015, 1:12 PM

TheDJ closed subtask T74675: Dynamically loading TimedMediaHandler for new content (preview) as Resolved.Oct 19 2015, 7:21 PM

matmarex closed subtask T87557: LivePreview does not show page status indicators as Resolved.Dec 26 2015, 9:05 PM

Aklapper added a subtask: T123061: Live preview does not display map (from Mapframe template) on English wikivoyage.Jan 7 2016, 4:14 PM

phabyogi mentioned this in T123061: Live preview does not display map (from Mapframe template) on English wikivoyage.Jan 8 2016, 1:28 PM

Aklapper closed subtask T123061: Live preview does not display map (from Mapframe template) on English wikivoyage as Invalid.Jan 8 2016, 11:35 PM

Aklapper added a subtask: T136907: Live preview for "Preview page with this template".Jun 3 2016, 10:32 AM

• Phabricator_maintenance removed a parent task: T4007: [DO NOT USE] Tracking bug [superseded by #Tracking].Jul 28 2016, 2:33 AM

Fomafix added a subtask: T145778: LivePreview "show changes" does not update or hide the category preview.Sep 15 2016, 2:09 PM

Krinkle removed a subscriber: Krinkle.Sep 15 2016, 7:47 PM

Aklapper added a subtask: T149816: LivePreview substitutes $$ by $ in summary preview.Nov 3 2016, 8:38 AM

matmarex closed subtask T149816: LivePreview substitutes $$ by $ in summary preview as Resolved.Nov 4 2016, 5:27 PM

Jdforrester-WMF renamed this task from Live preview (requires JavaScript) feature bugs (tracking) to Bugs in WikiEditor's "Live preview" feature (tracking).Feb 14 2017, 1:49 AM

Jdforrester-WMF added a project: WikiEditor.

Jdforrester-WMF updated the task description. (Show Details)

Justinrleung added a subscriber: Justinrleung.Jul 11 2017, 5:34 AM

Fomafix added a subtask: T171156: Live preview does not show the preview of the summary anymore.Jul 20 2017, 11:02 AM

Fomafix renamed this task from Bugs in WikiEditor's "Live preview" feature (tracking) to Bugs in "Live preview" feature (tracking).Jul 20 2017, 12:52 PM

I removed "WikiEditor" from task description because live preview is mainly a feature of core and not of the extension WikiEditor. The extension WikiEditor has also a feature live preview which uses also the API from core.

Jdforrester-WMF created subtask T171176: Rename the "live preview" feature to reflect what it is (it's inline, not live).Jul 20 2017, 3:07 PM

Jdforrester-WMF closed subtask T171176: Rename the "live preview" feature to reflect what it is (it's inline, not live) as Resolved.Aug 2 2017, 4:04 PM

matmarex closed subtask T171156: Live preview does not show the preview of the summary anymore as Resolved.Aug 9 2017, 8:49 PM

Aklapper added a subtask: T173792: ParserMigration extension is incompatible with LivePreview.Aug 22 2017, 7:45 AM

matmarex added a subtask: T176558: AJAX "Show changes" doesn't work when creating a page: "TypeError: response[0].query.pages[0].revisions is undefined".Sep 24 2017, 3:10 PM

WikiEditor's live preview was removed completely in rEWED77cea2697cc4: Drop the never-finished "Labs" publish and preview features.

Fomafix closed subtask T185683: Add uselang parameter to live preview diff requests as Resolved.Jan 25 2018, 8:07 PM

Aklapper added a subtask: T190120: Parse warnings not visible with live preview.Mar 20 2018, 8:53 AM

Please consider remaking this into a project, the table with listed tasks is unreadable right now for me and I would guess many others on similar page widths (1366px).