wp-shortcode-custom-post-type-by-category

function list_staff_members($atts, $content = null){
  //declare defaults and parse attributes
  
  $atts = shortcode_atts(array(
    'category' => 'Default Category'
  ), $atts);
}

  $args = array(
    'numberposts' => -1,
    'post_type'   => 'staff_members', //Custom post type slug
    'tax_query'   => array(
    // Note: tax_query expects an array of arrays.
      array(
        'taxonomy' => 'staff_categories', // our custom post type taxonomy slug
        'field'    => 'slug',
        'terms'    => array($atts['category']), //our category shortcode attribute
      ),
    ),
  );
  
  $query = new WP_Query( $args );

  while ( $query->have_posts() ) : $query->the_post();      
  
    //get post values
    $title = get_field('staff_member_title'); //custom field in post
    $postTitle = get_the_title();
    $postLink = get_permalink();


    //define html that we will return in our shortcode
    $html = '<div class="staffMember">';
    $html .= '<img src="'. $postThumbLink .'">';
    $html .= '<h3>'.$postTitle.'</h3>';
    $html .= '<p>'. $title .'</p>';
    $html .= '<a class="btn-bio" href='. $postLink .'>Click To Read Bio</a>';
    $displayMember .= '</div>';
    
  endwhile;
  
  wp_reset_query();
  
//return our html
return $html;

add_shortcode('list_staff', 'list_staff_members');