Add custom post type taxonomy tag to article class

Ah, solved it!

<aside class="work_item <?php $posttags = get_the_terms($post->ID, 'type'); if ($posttags) { foreach($posttags as $tag) { echo str_replace('-','_',$tag->slug . ' '); } } ?>" data-type="<?php $posttags = get_the_tags(); if ($posttags) { foreach ($posttags as $tag) { echo str_replace('-','_',$tag->slug . ' '); } } ?>">

had to use the get_the_terms() function

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