[wp-trac] [WordPress Trac] #33311: TB_window spinner should probably disappear when loading is done

[WordPress Trac]

#33311: TB_window spinner should probably disappear when loading is done
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 Reporter:  niklasbr     |       Owner:  afercia
     Type:  enhancement  |      Status:  assigned
 Priority:  normal       |   Milestone:  4.4
Component:  Plugins      |     Version:  4.2
 Severity:  normal       |  Resolution:
 Keywords:  has-patch    |     Focuses:  ui, javascript, administration,
  commit                 |  performance
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Comment (by afercia):

 Patch .2 is an alternate version if we want to support Internet Explorer
 8. Otherwise [attachment:33311.patch] should be good enough for modern
 browsers.
 - IE 8 needs a `allowTransparency='true'` attribute on the iframe, I guess
 the spinner never worked on IE 8 for this reason
 - IE 8 doesn't get dynamic changes for CSS generated elements unless the
 content of the pseudo element gets changed as well

 Please notice the spinner animated GIF will spin noticeably slower in IE 8
 and 9, that's because
 [http://blogs.msdn.com/b/ieinternals/archive/2010/06/08/animated-gifs-
 slow-down-to-under-20-frames-per-second.aspx any delay between animated
 GIFs frames less than 6/100 is changed to 10/100.] The only solution would
 be to serve a different GIF to old IEs and I guess it's not worth it.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33311#comment:20>
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