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getComputedStyle's second argument should not stringify null to "null" http://www.google.com/codesearch#search/&q=getcomputedstyle%5C(%5B%5E,%5D%2B,%5Cs*null%5Cs*%5C)%20lang:js&type=cs
What difference does it make? If the second argument isn't equal to "::before" or "::after", per spec it does nothing anyway, so stringifying to "null" and "" should do the same thing. Or am I misreading it?
Yeah.