Suggestions on how build an HTML Diff tool?

Question

In this post I asked if there were any tools that compare the structure (not actual content) of 2 HTML pages. I ask because I receive HTML templates from our designers, and freq

Answer 1

Run both files through the following Perl script, then use diff -iw to do a case-insensitive, whitespace-ignoring diff.

#! /usr/bin/perl -w

use strict;

undef $/;

my $html = ;

while ($html =~ /\S/) {
  if ($html =~ s/^\s*// or die "malformed HTML";
    print "<$1>\n";
  } else {
    $html =~ s/^([^<]+)//;
    print "(text)\n";
  }
}