11. click-once barChart transition

This is an example copied from Interactive Data Visualization for the web.

I updated it with d3.v4.

forked from EmbraceLife's block: 11. click-once barChart transition

<!DOCTYPE html>
<html lang="en">
	<head> 
		<meta charset="utf-8">
    
		<title>D3: A bar chart that transitions to new data!</title>
    
    <script src="https://d3js.org/d3.v4.min.js"></script>
    
		<style type="text/css">

</style>
    
	</head>
  
	<body>
	
		<p>Click on this text to update the chart with new data values (once).</p>
			
		<script type="text/javascript">

//Width and height
			var w = 600;
			var h = 250;
			
			var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13,
							11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ];
			
			var xScale = d3.scaleBand()
//       using data index as input range
							.domain(d3.range(dataset.length))
							.rangeRound([0, w])
      				.padding(0.05);

var yScale = d3.scaleLinear()
							.domain([0, d3.max(dataset)])
							.range([h, 0]);
			
			//Create SVG element
			var svg = d3.select("body")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

//Create bars
			svg.selectAll("rect")
			   .data(dataset)
			   .enter()
			   .append("rect")
			   .attr("x", function(d, i) {
			   		return xScale(i);
			   })
			   .attr("y", function(d) {
			   		return yScale(d);
			   })
			   .attr("width", xScale.bandwidth())
			   .attr("height", function(d) {
			   		return h - yScale(d);
			   })
			   .attr("fill", function(d) {
					return "rgb(0, 0, " + (d * 10) + ")";
			   });

//Create labels
			svg.selectAll("text")
			   .data(dataset)
			   .enter()
			   .append("text")
			   .text(function(d) {
			   		return d;
			   })
			   .attr("text-anchor", "middle")
			   .attr("x", function(d, i) {
			   		return xScale(i) + xScale.bandwidth() / 2;
			   })
			   .attr("y", function(d) {
			   		return yScale(d) + 14;
			   })
			   .attr("font-family", "sans-serif")
			   .attr("font-size", "11px")
			   .attr("fill", "white");

//On click, update with new data			
			d3.select("p")
				.on("click", function() {

dataset = [ 11, 12, 15, 20, 18, 17, 16, 18, 23, 25,
								5, 10, 13, 19, 21, 25, 22, 18, 15, 13 ];

svg.selectAll("rect")
					   .data(dataset)
					   .transition()								
					   .attr("y", function(d) {
					   		return yScale(d);
					   })
					   .attr("height", function(d) {
					   		return h - yScale(d);
					   })
					   .attr("fill", function(d) {
							return "rgb(0, 0, " + (d * 10) + ")";
					   });

svg.selectAll("text")
					   .data(dataset)
//           without transition(), new label will appear much faster without transition
          	 .transition()
					   .text(function(d) {
					   		return d;
					   })
					   .attr("x", function(d, i) {
					   		return xScale(i) + xScale.bandwidth() / 2;
					   })
					   .attr("y", function(d) {
					   		return yScale(d) + 14;
					   }); 
					   				
				});

</script> 
	</body> 
</html>

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