255150 2023-04-07 07:13:39 -0700 REGRESSION (Safari 16.4): clipboardData.setData removes newlines when : is in the line 2023-04-12 01:42:24 -0700 1 1 1 Unclassified WebKit DOM Safari 16 Mac (Intel) macOS 12 RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=250119 InRadar P2 Critical --- 1 nanne webkit-unassigned akeerthi webkit-bug-importer wenson_hsieh oldest_to_newest 1947271 0 nanne 2023-04-07 07:13:39 -0700 Browser Safari 16.4, the bug was not present in 16.3 Related: https://github.com/ajaxorg/ace/issues/5112 This bug breaks copying YAML or Python code from online code editors (Ace, CodeMirror, and Monaco). When testing, two scenarios: clipboardData.setData("text/plain", `test1\ntest2\ntest3`) Results into: test1 test2 test3 And: clipboardData.setData("text/plain", `test: 1\ntest2\ntest3`) Results into: test: 1test2test3 Eating up all the enters Example: https://jsfiddle.net/102g5phr/ (updated) 1947518 1 ap 2023-04-08 18:12:27 -0700 Could you please try Safari Technology Preview 167? I cannot reproduce with a newer Safari version, so I suspect that this was fixed as part of bug 250119. 1947519 2 webkit-bug-importer 2023-04-08 18:12:36 -0700 <rdar://problem/107796207> 1948186 3 nanne 2023-04-12 01:42:24 -0700 Yes, Safari Technology Preview 167 resolves the issue.