When LocalSettings.php allows usage of Parsedown Extended:
wfLoadExtension( 'WikiMarkdown' );
$wgAllowMarkdownExtra = true; // allows usage of Parsedown Extra
$wgAllowMarkdownExtended = true; // allows usage of Parsedown Extended
the following error occurs:
InvalidArgumentException: Sub-setting 'single_dollar' does not exist in 'math'.
Backtrace:
from /var/www/html/vendor/benjaminhoegh/parsedown-extended/src/ParsedownExtended.php(250)
#0 /var/www/html/vendor/benjaminhoegh/parsedown-extended/src/ParsedownExtended.php(190): ParsedownExtended->initializeSettings(array)
#1 /var/www/html/extensions/WikiMarkdown/includes/WikiMarkdown.php(327): ParsedownExtended->__construct(array)
#2 /var/www/html/extensions/WikiMarkdown/includes/WikiMarkdown.php(215): WikiMarkdown::getParsedown()
#3 /var/www/html/extensions/WikiMarkdown/includes/WikiMarkdown.php(46): WikiMarkdown::parseMarkdown(string, array)
#4 /var/www/html/includes/parser/Parser.php(4019): WikiMarkdown::parserHook(string, array, Parser, PPFrame_Hash)
#5 /var/www/html/includes/parser/PPFrame_Hash.php(353): Parser->extensionSubstitution(array, PPFrame_Hash, boolean)
#6 /var/www/html/includes/parser/Parser.php(2953): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#7 /var/www/html/includes/parser/Parser.php(1609): Parser->replaceVariables(string)
#8 /var/www/html/includes/parser/Parser.php(723): Parser->internalParse(string)
#9 /var/www/html/includes/content/WikitextContentHandler.php(301): Parser->parse(string, Title, ParserOptions, boolean, boolean, NULL)
#10 /var/www/html/includes/content/ContentHandler.php(1721): WikitextContentHandler->fillParserOutput(WikitextContent, MediaWiki\Content\Renderer\ContentParseParams, ParserOutput)
#11 /var/www/html/includes/content/Renderer/ContentRenderer.php(47): ContentHandler->getParserOutput(WikitextContent, MediaWiki\Content\Renderer\ContentParseParams)
#12 /var/www/html/includes/EditPage.php(4535): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput(WikitextContent, Title, NULL, ParserOptions)
#13 /var/www/html/includes/EditPage.php(4438): EditPage->doPreviewParse(WikitextContent)
#14 /var/www/html/includes/EditPage.php(3144): EditPage->getPreviewText()
#15 /var/www/html/includes/EditPage.php(779): EditPage->showEditForm()
#16 /var/www/html/includes/actions/EditAction.php(73): EditPage->edit()
#17 /var/www/html/includes/actions/SubmitAction.php(38): EditAction->show()
#18 /var/www/html/includes/MediaWiki.php(542): SubmitAction->show()
#19 /var/www/html/includes/MediaWiki.php(322): MediaWiki->performAction(Article, Title)
#20 /var/www/html/includes/MediaWiki.php(904): MediaWiki->performRequest()
#21 /var/www/html/includes/MediaWiki.php(562): MediaWiki->main()
#22 /var/www/html/index.php(50): MediaWiki->run()
#23 /var/www/html/index.php(46): wfIndexMain()
#24 {main}
Setting single_dollar to true or false doesn't fix the error
$wgParsedownExtendedParameters = [
'math' => [
'single_dollar' => true
],
'sup' => true,
'sub' => true
];