[Webkit-unassigned] [Bug 255150] New: clipboardData.setData removes enters when : is in the line

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255150

            Bug ID: 255150
           Summary: clipboardData.setData removes enters when : is in the
                    line
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Intel)
                OS: macOS 12
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nanne at fastmail.com

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)

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