HTML::Tiny, null parameter tags contradicting documentation

gsd4me has asked for the wisdom of the Perl Monks concerning the following question:

Am trying to generate some HTML using HTML::Tiny, which has been a good resource, up until now! I want to create an HTML5 tag of audio, such as:

<audio controls>
src = "file.mp3", type = "audio/mpeg"
</audio>
[download]

using the perl code:

$co->tag ('audio', { controls=>[], type => "audio\/mpeg", src => "$fil
+ename.".mp3"})
[download]

which produces this output:

<audio controls="controls" src="theme1.mp3" type="audio/mpeg"></audio>
[download]

In the HTML::Tiny documentation, it states (from the CPAN depository)

An empty attribute - such as 'checked' in a checkbox can be encoded by
+ passing an empty array reference:

print $h->closed( 'input', { type => 'checkbox', checked => [] } );
would print

<input checked type="checkbox" />
[download]

so what I want is an empty attribute for my "controls" part of the audio tag, which is obviously what is not happening. Any guidance? regards ADB

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Re: HTML::Tiny, null parameter tags contradicting documentation by tobyink (Canon) on Aug 24, 2018 at 11:21 UTC
As an aside, in SGML-based versions of HTML (i.e. before HTML5), `<foo bar>` is considered to be a shorthand for `<foo bar="bar">`. Most web browsers treated `<foo bar>` as being equivalent to `<foo bar="">` though, which is why the HTML5 spec treats it that way. toby döt ink	[reply] [d/l] [select]
Re: HTML::Tiny, null parameter tags contradicting documentation by TheloniusMonk (Sexton) on Aug 24, 2018 at 07:41 UTC
Perhaps a doc bug. But an empty attribute can also be set as e.g. controls="". So `use HTML::Tiny; my $co = HTML::Tiny->new; my $filename = 'theme1'; print $co->tag ('audio', { controls=>"", type => "audio\/mpeg", src => + "$filename.mp3"}); print "\n";` [download] produces `<audio controls="" src="theme1.mp3" type="audio/mpeg"></audio>` [download] which ought to have the same effect.	[reply] [d/l] [select]
Re: HTML::Tiny, null parameter tags contradicting documentation by Lotus1 (Vicar) on Sep 02, 2018 at 18:08 UTC
I could not reproduce your results. Your example output an empty attribute in my test code. Please provide a complete program with your actual code and output. `use warnings; use strict; use HTML::Tiny; ## from the module documention my $h = HTML::Tiny->new( mode => 'html' ); print $h->closed( 'input', { type => 'checkbox', checked => [] } ); print "\n"; ## example from OP print $h->tag ('audio', { controls=>[], type => "audio\/mpeg", src => +"test.mp3"}); __DATA__ <input checked type="checkbox"> <audio controls src="test.mp3" type="audio/mpeg"></audio>` [download]	[reply] [d/l]