Provided by: libhtml-lint-perl_2.20+dfsg-1_all bug

NAME

       HTML::Lint - check for HTML errors in a string or file

VERSION

       Version 2.20

SYNOPSIS

           my $lint = HTML::Lint->new;
           $lint->only_types( HTML::Lint::Error::STRUCTURE );

           $lint->parse( $data );
           $lint->parse_file( $filename );

           my $error_count = $lint->errors;

           foreach my $error ( $lint->errors ) {
               print $error->as_string, "\n";
           }

       HTML::Lint also comes with a wrapper program called weblint that handles linting from the
       command line:

           $ weblint http://www.cnn.com/
           http://www.cnn.com/ (395:83) <IMG SRC="spacer.gif"> tag has no HEIGHT and WIDTH attributes.
           http://www.cnn.com/ (395:83) <IMG SRC="goofus.gif"> does not have ALT text defined
           http://www.cnn.com/ (396:217) Unknown element <nobr>
           http://www.cnn.com/ (396:241) </nobr> with no opening <nobr>
           http://www.cnn.com/ (842:7) target attribute in <a> is repeated

       And finally, you can also get Apache::HTML::Lint that passes any mod_perl-generated code
       through HTML::Lint and get it dumped into your Apache error_log.

           [Mon Jun  3 14:03:31 2002] [warn] /foo.pl (1:45) </p> with no opening <p>
           [Mon Jun  3 14:03:31 2002] [warn] /foo.pl (1:49) Unknown element <gronk>
           [Mon Jun  3 14:03:31 2002] [warn] /foo.pl (1:56) Unknown attribute "x" for tag <table>

METHODS

       NOTE: Some of these methods mirror HTML::Parser's methods, but HTML::Lint is not a
       subclass of HTML::Parser.

   new()
       Create an HTML::Lint object, which inherits from HTML::Parser.  You may pass the types of
       errors you want to check for in the "only_types" parm.

           my $lint = HTML::Lint->new( only_types => HTML::Lint::Error::STRUCTURE );

       If you want more than one, you must pass an arrayref:

           my $lint = HTML::Lint->new(
               only_types => [HTML::Lint::Error::STRUCTURE, HTML::Lint::Error::FLUFF] );

   $lint->parser()
       Returns the parser object for this object, creating one if necessary.

   $lint->parse( $text )
   $lint->parse( $code_ref )
       Passes in a chunk of HTML to be linted, either as a piece of text, or a code reference.
       See HTML::Parser's "parse_file" method for details.

   $lint->parse_file( $file )
       Analyzes HTML directly from a file. The $file argument can be a filename, an open file
       handle, or a reference to an open file handle.  See HTML::Parser's "parse_file" method for
       details.

   $lint->eof
       Signals the end of a block of text getting passed in.  This must be called to make sure
       that all parsing is complete before looking at errors.

       Any parameters (and there shouldn't be any) are passed through to HTML::Parser's eof()
       method.

   $lint->errors()
       In list context, "errors" returns all of the errors found in the parsed text.  Each error
       is an object of the type HTML::Lint::Error.

       In scalar context, it returns the number of errors found.

   $lint->clear_errors()
       Clears the list of errors, in case you want to print and clear, print and clear.

   $lint->only_types( $type1[, $type2...] )
       Specifies to only want errors of a certain type.

           $lint->only_types( HTML::Lint::Error::STRUCTURE );

       Calling this without parameters makes the object return all possible errors.

       The error types are "STRUCTURE", "HELPER" and "FLUFF".  See HTML::Lint::Error for details
       on these types.

   $lint->gripe( $errcode, [$key1=>$val1, ...] )
       Adds an error message, in the form of an HTML::Lint::Error object, to the list of error
       messages for the current object.  The file, line and column are automatically passed to
       the HTML::Lint::Error constructor, as well as whatever other key value pairs are passed.

       For example:

           $lint->gripe( 'attr-repeated', tag => $tag, attr => $attr );

       Usually, the user of the object won't call this directly, but just in case, here you go.

   $lint->newfile( $filename )
       Call "newfile()" whenever you switch to another file in a batch of linting.  Otherwise,
       the object thinks everything is from the same file.  Note that the list of errors is NOT
       cleared.

       Note that $filename does NOT need to match what's put into parse() or parse_file().  It
       can be a description, a URL, or whatever.

MODIFYING HTML::LINT'S BEHAVIOR

       Sometimes you'll have HTML that for some reason cannot conform to HTML::Lint's
       expectations.  For those instances, you can use HTML comments to modify HTML::Lint's
       behavior.

       Say you have an image where for whatever reason you can't get dimensions for the image.
       This HTML snippet:

           <img src="logo.png" height="120" width="50" alt="Company logo">
           <img src="that.png">

       causes this error:

           foo.html (14:20) <img src="that.png"> tag has no HEIGHT and WIDTH attributes

       But if for some reason you can't get those dimensions when you build the page, you can at
       least stop HTML::Lint complaining about it.

           <img src="this.png" height="120" width="50" alt="Company logo">
           <!-- html-lint elem-img-sizes-missing: off, elem-img-alt-missing: off -->
           <img src="that.png">
           <!-- html-lint elem-img-sizes-missing: on, elem-img-alt-missing: off -->

       If you want to turn off all HTML::Lint warnings for a block of code, use

           <!-- html-lint all: off -->

       And turn them back on with

           <!-- html-lint all: off -->

       You don't have to use "on" and "off".  For "on", you can use "true" or "1".  For "off",
       you can use "0" or "false".

       For a list of possible errors and their codes, see HTML::Lint::Error, or run perldoc
       HTML::Lint::Error.

BUGS, WISHES AND CORRESPONDENCE

       All bugs and requests are now being handled through GitHub.

           https://github.com/petdance/html-lint/issues

       DO NOT send bug reports to http://rt.cpan.org/ or http://code.google.com/

TODO

       •   Check for attributes that require values

       •   <TABLE>s that have no rows.

       •   Form fields that aren't in a FORM

       •   Check for valid entities, and that they end with semicolons

       •   DIVs with nothing in them.

       •   HEIGHT= that have percents in them.

       •   Check for goofy stuff like:

               <b><li></b><b>Hello Reader - Spanish Level 1 (K-3)</b>

COPYRIGHT & LICENSE

       Copyright 2005-2012 Andy Lester.

       This program is free software; you can redistribute it and/or modify it under the terms of
       the Artistic License v2.0.

       http://www.opensource.org/licenses/Artistic-2.0

       Please note that these modules are not products of or supported by the employers of the
       various contributors to the code.

AUTHOR

       Andy Lester, andy at petdance.com