$. is a variable in Perl. See perlvar.

You are interpolating this variable in the string $.ajax(.... I recommend putting Javascript in a separate file and reading it from Perl, or alternatively using a non-interpolating here-document:

print <<'EOF';
  This costs many $$$
EOF

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In reply to Re: what is this error means Use of uninitialized value $. in concatenation (.) or string by Corion
in thread what is this error means Use of uninitialized value $. in concatenation (.) or string by aca

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