Here is an old script I've written.Hope it helps.
continent is the mouse entered div, tooltipOutput    
function continentTooltip(continent, tooltipOutput) {
    var tooltip = $('.map__tooltip');
    $(continent).mouseenter(function() {
       $(document).off('mousemove').bind('mousemove', function(e){
          var positionX = (e.pageX + 20) + 'px';
          var positionY = e.pageY + 'px';
          $('.map__tooltip').css(      
             "transform" , 'translate(' + positionX + ', ' + positionY + ')'
          );
       });
       tooltip.addClass('map__tooltip--show');
       tooltip.text(tooltipOutput)
    })
    $(continent).mouseleave(function() {
        tooltip.removeClass('map__tooltip--show');         
    });
  }
  //call script
  continentTooltip(africa, 'Vacations in Africa');
HTML: 
<div class="map__tooltip"></div>
CSS:
.map__tooltip {
     display: none;
     background-color: #FFF;
     border-radius: $radius;
     padding: 4px;
     position: absolute;
     top: 0;
     left: 0;
}
.map__tooltip--show {
    display: block;
}
@media screen and (max-width: 1300px) {
    .map__tooltip--show {
        display: none;
    }
}