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

I'm using the traverse function in HTML::Treebuilder and it does not seem to recognise the span tag. My code is:

$html=$response->content;
$treeparse=HTML::TreeBuilder->new;
$treeparse->parse($html);            
$treeparse->traverse(\&treewalker);
$treeparse->delete();

sub treewalker
{
    my ($node, $start, $depth) = @_;
        if (ref $node) 
    {
       
             my $tag = $node->tag;

         if ($tag eq "span")
         {
               ....

         }
     }
}

[download]

it never executes the code with the if block even though there are span elements in the html I am parsing.

Replies are listed 'Best First'.
Re: Is the span tag supported by HTML:Treebuilder
by cianoz (Friar) on Jan 22, 2001 at 17:32 UTC
    you should add 
    return HTML::Element::OK;

    [download]
    at the end of the callback subroutine to keep traversing the tree, your code stops at the first tag
[reply]
[d/l]
      I was already returning a value of 1 to make it loop through the tree but that was one of the lines I cut for brevity. I changed it to return HTML::Element::OK but it still does not work. It will pick out all the other tags that I've tried (such as div, a, b)

      CH
[reply]
        it works fine for me, with SPAN and a with few other tags i tested, did you tried with other pages? it could be due to errors in the html syntax...
[reply]

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