NEW 181304
macOS and iOS render zero width joiners differently 
https://bugs.webkit.org/show_bug.cgi?id=181304
Summary macOS and iOS render zero width joiners differently
Craig Hockenberry
Reported 2018-01-04 12:51:19 PST
Unicode text which contains zero width joiners displays differently on macOS and iOS. To reproduce: 1) Open the following page on both platforms: https://meta.stackoverflow.com/questions/361390/can-posts-to-stack-overflow-be-fingerprinted-using-hidden-unicode-characters 2) Compare how the code samples are rendered Expected result: The rendering should be identical. Actual result: The rendering is quite different. iOS appears to be displaying the zero width joiner as a space character.
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Radar WebKit Bug Importer
Comment 1 2018-01-04 12:56:42 PST
<rdar://problem/36303681>
Myles C. Maxfield
Comment 2 2018-01-04 14:43:39 PST
This will be fixed by https://bugs.webkit.org/show_bug.cgi?id=175778
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