Bug 255150

Summary: REGRESSION (Safari 16.4): clipboardData.setData removes newlines when : is in the line
Product: WebKit Reporter: Nanne Wielinga <nanne>
Component: DOMAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Critical CC: akeerthi, webkit-bug-importer, wenson_hsieh
Priority: P2 Keywords: InRadar
Version: Safari 16   
Hardware: Mac (Intel)   
OS: macOS 12   
See Also: https://bugs.webkit.org/show_bug.cgi?id=250119

Description Nanne Wielinga 2023-04-07 07:13:39 PDT 
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)
Comment 1 Alexey Proskuryakov 2023-04-08 18:12:27 PDT 
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.
Comment 2 Radar WebKit Bug Importer 2023-04-08 18:12:36 PDT 
<rdar://problem/107796207>
Comment 3 Nanne Wielinga 2023-04-12 01:42:24 PDT 
Yes, Safari Technology Preview 167 resolves the issue.