What am I doing wrong here?I think the pipe is messing everything up.

No, the pipe is fine. Jusr redirect stderr (fileno 2) to stdout (fileno 1): 

open(SY, "echo blablabla|/usr/bin/js 2>&1|") or die "$!";
while(<SY>){
    print ">>$_";
}

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In reply to Re: perl, open and pipe by shmem
in thread perl, open and pipe by perlpreben

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