use Perl

• JavaScript squisher (Score:2)

  by malte (1708) on 2007.03.03 14:33 (#53466) Homepage Journal

  I'm sorry I can only unrecommend JavaScript::Squish [cpan.org]. It produces non-working JS for very simple input.

  These regexes worked for me:

          $output =~ s(^\s*//.*$)()gm; # c++ style comments on line without code
      $output =~ s(^\s+)()gm;      # leading white space
      my $end = "\s*[\r\n]+";
      $output =~ s(;$end)(;)g;     # no newline after ;
      $output =~ s({$end)({)g;     # no newline after {
      $output =~ s(\s+$)()mg;      # trailing space
      $output =~ s(\n+)(\n)g;      # multiple new lines
      $output =~ s(//[^"'\n]*$)()gm;  # c++ style comments that cant be in quotes

  Use with super care. There will be numerous edge cases

  Reply to This

  • Re: (Score:1)

    by ChrisDolan (2855)

    Interesting, that's more detailed than my own conservative attempt:

    $in =~ s{^/\*.*?\*/}{}gxms;
    $in =~ s{^//.*?$}{}gxms;
    $in =~ s{^[ ]+}{}gxms;
    $in =~ s{\n+}{\n}gxms;

    I deliberately only strip from beginning or ends of line to reduce risk of stripping from inside quotes. The above already chops enough that I can feel comfortable indenting and commenting my Javascript code thoroughly.