HTML::Lint::HTML4 -- Rules for HTML 4 as used by HTML::Lint.

       Andy Lester "andy at petdance.com"

       Copyright 2005-2018 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.

perl v5.32.0                                       2020-12-28                             HTML::Lint::HTML4(3pm)

       The functions below are very specifically not exported, and need to be called with a complete package
       reference, so as to remind the programmer that she is monkeying with the entire package.

   add_tag($tag);
       Adds a tag to the list of tags that HTML::Lint knows about.  If you specify a tag that HTML::Lint already
       knows about, then nothing is changed.

           HTML::Lint::HTML4::add_tag( 'canvas' );

   add_attribute($tag,$attribute);
       Adds an attribute to a tag that HTML::Lint knows about.  The tag must already be known to HTML::Lint or
       else this function will die.

           HTML::Lint::HTML4::add_attribute( 'canvas', $_ ) for qw( height width );

       HTML::Lint::HTML4 -- Rules for HTML 4 as used by HTML::Lint.

       Collection of tags and attributes for use by HTML::Lint.  You can add your own tags and attributes if you
       like.

           # Add an attribute that your company uses.
           HTML::Lint::HTML4::add_attribute( 'body', 'proprietary-attribute' );

           # Add the HTML 5 <canvas> tag.
           HTML::Lint::HTML4::add_tag( 'canvas' );
           HTML::Lint::HTML4::add_attribute( 'canvas', $_ ) for qw( height width );

       This must be done before HTML::Lint does any validation.  Note also that this modifies a global table,
       and is not on a per-object basis.