Built with blockbuilder.org
<!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;
}
.parent {
background-color: #f4f4f4;
border: 1px solid #000;
width: 100px;
max-width: 100px
height: 100px;
display: inline-table;
margin: 2px;
}
.child {
background-color: #d3d3d3;
width: 10px;
height: 10px;
border: 1px solid #afafaf;
padding: 2px;
margin: 2px;
display: inline-table;
}
</style>
</head>
<body>
<script>
var alphabet = "abcdefghijklmnopqrstuvwxyz".split("");
function update() {
var data = d3.shuffle(alphabet)
.slice(0, Math.floor(Math.random() * 26))
.sort();
// Parent Selection
var parents = d3.select("body").selectAll(".parent")
.data(data, function(d) { return d });
// Exit
parents
.exit()
.transition() // Added to make it easier to see updates
.style("opacity",0)
.remove()
// Enter
parents.enter().append("div")
.attr("class", "parent")
.merge(parents) // this allows you to do enter & update
.each(function() {
var thisParent = d3.select(this);
var childData = d3.shuffle(alphabet)
.slice(0, Math.floor(Math.random() * 26))
.sort();
// Child Selection
var children = thisParent.selectAll(".child")
.data(childData, function(d) { return d });
// Child Exit
children.exit().remove();
// Child Enter
children.enter().append("div")
.attr("class", "child")
.transition() // Added to make it easier to see updates
.text(function(d) { return d });
});
}
update();
d3.interval(update, 4000)
</script>
</body>