<style type="text/css">
div.bar {
    display: inline-block;
    width: 20px;
    height: 75px;
    background-color: teal;
}
</style>
<script type="text/javascript">
var dataset = [ 5, 10, 15, 20, 25 ];
d3.select("body").selectAll("div")
   .data(dataset)
   .enter()
   .append("div")
   .attr("class", "bar")
   .style("height", function(d) {
      var barHeight = d * 5;       return barHeight + "px";
   });
</script>