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Sanitizer::validateAttributes() strips relative URLs from anchor tags
Open, Needs TriagePublic


In T165535 I was attempting to use Sanitizer::removeHTMLtags() to remove all of the HTML tags from the parsed wikitext except for anchor tags. However, I noticed that the href attribute was always stripped from the anchor. Upon further investigation, I found this note:

this also drops all relative URLs

We should, at a minimum, support root-relative links.