d3_events2.html

<!doctype html>
<html>
<head>
    <style>
        div {
            height: 100px;
            width: 100px;
            background-color: steelblue;
            margin:5px;
        }
    </style>
    <script src="https://d3js.org/d3.v4.min.js"></script>
</head>
<body>
<div> </div>
<script>
    d3.selectAll("div")
      .on("mouseover", function(){
          d3.select(this)
            .style("background-color", "orange");

          // Get current event info
          console.log(d3.event);
          
          // Get x & y co-ordinates
          console.log(d3.mouse(this));
      })
      .on("mouseout", function(){
          d3.select(this)
            .style("background-color", "steelblue")
      });
</script>
</body>
</html>