[wp-trac] [WordPress Trac] #34049: Emoji detection is broken on FF41, OS X 10.10

[WordPress Trac]

#34049: Emoji detection is broken on FF41, OS X 10.10
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 Reporter:  rmccue        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by rmccue):

 So, as it turns out, FF doesn't render emoji on Canvas, just in HTML.
 Thankfully, it turns out we can use SVG's foreignObject to load HTML into
 SVG, then SVG into Canvas, and check that instead.

 http://codepen.io/anon/pen/zvoWOQ demonstrates the technique, and is
 consistent with support across FF, Chrome and Safari. (Safari needs the
 blob type to be `image/svg` and doesn't work with the suggested
 `image/svg;charset=utf-8` from MDN)

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Ticket URL: <https://core.trac.wordpress.org/ticket/34049#comment:2>
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