Because there is no good reason for Facebook to render css and try to extract background images which are likely to be style... Facebook DOES have a microformat, Open Graph.
https://developers.facebook.com/docs/opengraph/ http://ogp.me/ http://www.mediawiki.org/wiki/Extension:OpenGraphMeta ~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name] On 11-07-23 10:43 PM, alicatux wrote: > logos are content, not style so we should use img > > the only way to fix it in mediawiki probably is to add some kind of > microformat to the logo > but still I doubt facebook whether will process that microformat > > How is this not a facebook bug? > > On 24 July 2011 17:15, Daniel Friesen <[email protected]> wrote: >> On 11-07-23 09:21 PM, K. Peachey wrote: >>> On Sun, Jul 24, 2011 at 2:17 PM, <[email protected]> wrote: >>>> Ha Ha, Ha Ha, told you so *for years*. Now when anybody quotes a >>>> MediaWiki article on Facebook, there is a 95% chance it will look bad... >>>> serves you all right! Plus (Google+? Dare not also test it there to see >>>> what happens), it is NOT a Facebook bug. Ho Ho Ho. Muhahaha. >>> How is this not a facebook bug? It doesn't scan the page properly for >>> a list of possible images to choose from? >> Facebook scans the <img> tags on a page for images that are at least >> 50x50px with a max aspect ratio of 3:1. >> When you try to share a url for a Wikipedia article with a good set of >> images you'll get a selection of images to pick from. Of course an >> article without any images won't have any to pick from and FB will just >> use no image. It does trip up on some of the templates the Wikipedia >> community uses, some of which embed some icons at sizes slightly larger >> than 50x50px causing FB to include those. >> The logo is an embedded background-image so it doesn't show up in the scan. >> >> jidanni seams to have the opinion that the logo of a wiki is so >> important that a user with a text browser that can't see images would >> like to see something like "[site logo here]" to indicate that the site >> has a logo they can't even see. >> >> jidanni isn't particularly good at calmly presenting a problem in a way >> that would get people to see what pieces are broken and get people to >> chime in on ways to fix them. Rather he seams to think that insulting >> the people he's trying to get to change something will help, rather than >> cause them to simply dismiss him as a jackass and miss the few valid >> points of his cause counterproductively making it even less likely what >> he's trying to get changed will be changed. >> He might also want to take a look at the flash based sites out there >> before he tries to argue that MW which is built with a number of >> features to permit accessibility for screen readers and text browsers >> was built by people with no knowledge of how screen readers and search >> engines work. >> >> >> Looking over things. Our powered by icons and whatnot make use of <img> >> tags. Sadly while the background-image trick could hide them I don't >> believe it would work since that'll break the accessibility there since >> the background-image trick can't replicate the alt text, least not >> without having negative quirks while images are still loading. Screen >> reader and search engine wise the <img> would be correct here. >> The logo uses a background-image. It's not a static pre-bundled image >> like the powered by icons. In this case, I believe that the function of >> using the background-image rather than an <img> with an alt or an empty >> alt="" is to prevent overly large logos (we don't have a standard logo >> size, and the sizes that skins use actually vary) from overflowing out >> of the logo area and obscuring the page content. >> >> -- >> ~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name] >> >> >> _______________________________________________ >> MediaWiki-l mailing list >> [email protected] >> https://lists.wikimedia.org/mailman/listinfo/mediawiki-l >> > _______________________________________________ > MediaWiki-l mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/mediawiki-l -- ~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name] _______________________________________________ MediaWiki-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
