As hippo mentioned, chomp. See also https://perlmaven.com/open-and-read-from-files:

"In this article we see how to do this with core perl, but there are more modern and nicer ways to do this using Path::Tiny to read files."

In addition to that you should consider properly indenting your code to make it easier to follow.

In reply to Re^4: Running JavaScript from within Perl by marto
in thread Running JavaScript from within Perl by anautismobserver

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