      <li>
                    Classic pattern to add tooltip, as explained in the
                    <a
                      href="https://www.d3-graph-gallery.com/interactivity.html"
                      >dedicated section</a
                    >.
                  </li>
                  <br />
                  <li>
                    But does not work very well, probably due to tiny bar size?
                    Looks like the Y coordinate does not work very well.
                  </li>
         