Multiline syntax for piping a heredoc; is this portable?

Question

I\'m familiar with this syntax:

cmd1 << EOF | cmd2
text
EOF

but just discovered that bash allows me to write:

cmd1 &         


        

Answer 1

Hmm, I suppose yes, according to the test in bash in POSIX mode:

$ bash --posix
$ cat < ahoj
> nazdar
> EOF
> sed 's/a/b/'
bhoj
nbzdar