.last node [UNLISTED]

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)

svg.selectAll('circle')
    .data(d3.range(20 + 20 * Math.random()))
    .enter()
    .append('circle')
    .attr('r', 5)
    .attr('cx', function(d){ return 10 + d * 15; })
    .attr('cy', 10)
    .attr('fill', '#aaa');
    
    // Get the first node of a list with .node()
    var first = svg.selectAll('circle')
        .node();
    d3.select(first).attr('fill','red');

// Select the last node of a list with :last-child
    var last = svg.select('circle:last-child')
        .node();
    d3.select(last).attr('fill','green');

// Filter the last (or other) node of a list
    // (need to know the size)
    var all = svg.selectAll('circle');
    var last2 = all
        .filter(function(d,i){
          return i == all.size() - 1 - 3;
        })
        .node();
    d3.select(last2).attr('fill','pink');

</script>
</body>

https://d3js.org/d3.v4.min.js