a9e05f7f70bd6315a77c by enjalot

index.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  margin: auto;
  position: relative;
  width: 960px;
}

.node {
  border: solid 1px white;
  font: 10px sans-serif;
  line-height: 12px;
  overflow: hidden;
  position: absolute;
  text-indent: 2px;
}

.node img {
  position:absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 3;
}

.node span {
  position:absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 5;
}

.nsfw {
  font-size: 18px;
  font-weight: bold;
  color: #fff;
  line-height: 24px;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 40, right: 10, bottom: 10, left: 10},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var treemap = d3.layout.treemap()
    .size([width, height])
    .children(function(d) { return d.values; })
    .padding(2)
    .value(function(d) { return 1; });

var color = d3.scale.log()
  .range(["#91bfdb","#fc8d59"]);

var div = d3.select("body").append("div")
    .style("position", "relative")
    .style("width", (width + margin.left + margin.right) + "px")
    .style("height", (height + margin.top + margin.bottom) + "px")
    .style("left", margin.left + "px")
    .style("top", margin.top + "px");

var last = 0;
var paused = false;

var after = "";
var loaded = true;

d3.timer(function(){
  if(paused) return false
  var now = +new Date();
  if(now - last < 2000) return false;
  last = now;
  if(loaded) getData()
})

function getData() {
  var url = "//www.reddit.com/.json?limit=50";
  if(after) url += "&after=" + after
  loaded = false;
  d3.json(url, function(error, raw) {
    var data = raw.data.children.map(function(d) { return d.data; });
    treechart(data);
    after = data[25].name;
    setTimeout(function(){
      loaded = true;
    }, 1200)
  });
};


function treechart(data) {
  color.domain(
    d3.extent(data, function(d) { return d.ups / d.num_comments; })
  );

  var nested = d3.nest()
      .key(function(d) { return "root"; })
      .key(function(d) { return d.subreddit; })
      .entries(data)[0];

  var transformed = treemap.nodes(nested);

  var node = div.selectAll(".node")
    .data(transformed, function(d) { return "key" in d ? (d.key + d.depth) : d.id; });

  node.exit()
    .transition()
    .duration(400)
    .style("opacity", 0)
    .remove();

  node
    .transition()
    .delay(400)
    .duration(400)
    .call(position)

  var entered = node
    .enter().append("div")
      .attr("class", "node")
      .style("opacity", 0)
      .call(position)
      .style("background", function(d) {
        var score = d.ups / d.num_comments;
        return d.children ? null : color(score);
      })
      .filter(function(d) { return !!d.id; })
      .on("click", function(d) {
        console.log(d); 
      })

    entered
      .transition()
      .delay(800)
      .duration(400)
      .style("opacity", 1);

    entered
      .filter(function(d) { return !!d.thumbnail; })
      .append("img")
      .attr("src", function(d) { return d.thumbnail; });

    entered
      .append("span")
      .text(function(d) { return d.children ? null : d.subreddit; })
    d3.selectAll(".node")
      .filter(function(d) { return d.over_18; })
      .classed("nsfw", true)
      .style("background", "red")
      .html("")
      .text("nsfw!");


};

function position() {
  this.style("left", function(d) { return d.x + "px"; })
      .style("top", function(d) { return d.y + "px"; })
      .style("width", function(d) { return Math.max(0, d.dx - 1) + "px"; })
      .style("height", function(d) { return Math.max(0, d.dy - 1) + "px"; });
}

</script>