Old school D3 from simpler times

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TollyCoburn

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BarChart Transitions

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<!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>

<p>Click on this text to update the chart with new data values (once).</p>

<script>
    //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()
							.domain(d3.range(dataset.length))
							.rangeRound([0, w])
							.paddingInner(0.05);
			var yScale = d3.scaleLinear()
							.domain([0, d3.max(dataset)])
							.range([0, h]);
			
			//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 h - yScale(d);
			   })
			   .attr("width", xScale.bandwidth())
			   .attr("height", function(d) {
			   		return yScale(d);
			   })
			   .attr("fill", function(d) {
					return "rgb(0, 0, " + Math.round(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 h - 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() {
					
          //New values for dataset
					var numValues = dataset.length;
        	var maxValue = 100
					dataset = [];  						 				
					for (var i = 0; i < numValues; i++) {			
						var newNumber = Math.floor(Math.random() * maxValue); 
						dataset.push(newNumber);			 			
					}
        
          //Update scale domain
					//Recalibrate the scale domain, given the new max value in dataset
					yScale.domain([0, d3.max(dataset)]);
        
        
					//Update all rects
					svg.selectAll("rect")
					   .data(dataset)
          	 .transition()
          	 .duration(1000)
          	 .ease(d3.easeBounceOut)
					   .attr("y", function(d) {
					   		return h - yScale(d);
					   })
					   .attr("height", function(d) {
					   		return yScale(d);
					   })
					   .attr("fill", function(d) {
							return "rgb(0, 0, " + Math.round(d * 10) + ")";
					   });
					//Update all labels
					svg.selectAll("text")
					   .data(dataset)
          	 .transition()
          	 .duration(1000)
          	 .ease(d3.easeBounceOut)
					   .text(function(d) {
					   		return d;
					   })
					   .attr("x", function(d, i) {
					   		return xScale(i) + xScale.bandwidth() / 2;
					   })
					   .attr("y", function(d) {
					   		return h - yScale(d) + 14;
					   });
					   				
				});

</script>
</body>

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