s://bl.ocks.org/ganezasan/52fced34d2182483995f0ca3960fe228">
          <div class="portfolio-hover">
            <div class="portfolio-hover-content">
              <p>Button and smooth transition</p>
              <hr>
              <p class="explanation_portfolio">A treemap with a button allowing to switch from size to count for rectangle size. Good to learn how to perform a smooth transition.</p>
            </div>
          </div>
          <img class="img-fluid showBlock" src="img/block/block_treemapTr