181302 2018-01-04 12:46:46 -0800 Web Inspector: Zero-width joiners and other hidden Unicode characters are not displayed 2021-01-23 07:52:35 -0800 1 1 1 Unclassified WebKit Web Inspector Safari Technology Preview All All NEW InRadar P2 Normal --- 1 craig.hockenberry webkit-unassigned bburg ebrahim emacemac7 gsnedders inspector-bugzilla-changes joepeck rmondello webkit-bug-importer oldest_to_newest 1385897 0 craig.hockenberry 2018-01-04 12:46:46 -0800 Zero-width joiners and other hidden Unicode characters in #text nodes are not displayed in the Web Inspector. To reproduce: 1) Open this web page: https://meta.stackoverflow.com/questions/361390/can-posts-to-stack-overflow-be-fingerprinted-using-hidden-unicode-characters 2) Select the "foo" in the "foo * bar" sample code 3) Inspect the element 4) Look at the nodeValue for the #text node Expected result: All the Unicode code points in the element should be visible. Chrome displays the HTML entities for the Unicode code points contained within the element: &zwnj;&#x200B;&zwnj;&#x200B;&zwnj;&zwnj;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&#x200B;&#x200B;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&#x200B;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&zwnj;&#x200B;&zwnj;&#x200B;&#x200B;&#x2060;&zwnj;&#x200B;&#x200B;&#x200B;&#x200B;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&#x200B;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&zwnj;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&zwnj;&#x2060;&zwnj;&#x200B;&#x200B;&#x200B;&#x200B;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&zwnj;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&zwnj;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&zwnj;&zwnj;&#x2060;&zwnj;&#x200B;&#x200B;&#x200B;&#x200B;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&zwnj;&#x200B;&#x2060;&zwnj;&#x200B;&#x200B;&#x200B;&#x200B;&#x200B;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&zwnj;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&#x200B;&#x200B;&#x200B;&zwnj;&#x2060;&zwnj;&zwnj;&#x200B;&zwnj;&zwnj;&zwnj;&#x200B;&#x2060;&zwnj;&zwnj;&zwnj;&zwnj;&zwnj;&zwnj;foo Actual result: Text value is displayed as " foo ". 1385959 1 webkit-bug-importer 2018-01-04 15:25:48 -0800 <rdar://problem/36307533> 1721462 2 smoley 2021-01-21 19:37:52 -0800 *** Bug 220831 has been marked as a duplicate of this bug. *** 1721631 3 gsnedders 2021-01-22 11:04:32 -0800 What do we want to display escaped? General category C*? Some of White_Space=yes, as well, probably? 1721845 4 ebrahim 2021-01-23 07:52:35 -0800 > What do we want to display escaped? General category C*? Some of White_Space=yes, as well, probably? Oh, finding a unicode category of them also would be nice, it should contain what WebKit initially started at Bug 93888 and ended up to be https://source.chromium.org/chromium/chromium/src/+/master:third_party/devtools-frontend/src/front_end/elements/ElementsTreeOutline.js;l=1679?q=MappedCharToEntity&ss=chromium I started a draft based on the two on https://pastebin.com/1hVMRLD3