Copy selected items to clipboard

[enoryw]

I'm looking to create a binding (e.g. ctrl-y) to copy selected items to clipboard, each item on its own line. The following works for current item:

--bind "ctrl-y:execute-silent(echo {} | wl-copy --trim-newline)"

With echo {+}, the selected items are space-separated as a single line as the manpage states:

A placeholder expression starting with + flag will be replaced to the space-separated list of the selected lines
(or the current line if no selection was made) individually quoted.

It is very typical for strings to contain spaces, so it makes it impossible to delimit the concatenated items. How to get back a list of selected items as line-separated? Would a feature request to use a custom delimiter be reasonable and best approach?

[LangLangBart]

How to get back a list of selected items as line-separated?

Combine the f and + flag.

Placeholder	Description
{}	current line
{n}	current line number (zero index)
{q}	current query

Placeholder expression flags	Description
+	space-separated list of the selected lines
f	temporary file
s	preserve whitespace

# macOS copy/paste commands
seq 4 | fzf --multi --bind 'result:select-all+become:cat {+f} | pbcopy'

pbpaste
1
2
3
4

EDIT1: add --multi flag