fresh block

forked from anonymous's block: fresh block

<!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; }
    rect {
				fill: red;
		}
  </style>
</head>

<body>
  <script>
    var nodeData = [
      {key: 'A', value: 336},
      {key: 'B', value: 98},
      {key: 'C', value: 57},
      {key: 'D', value: 77},
    ];
    // Feel free to change or delete any of the code you see in this editor!
    var width = 960
    var height = 500
    var yScale = d3.scaleLinear()
    	.range([height, 0])
    	.domain([0, d3.max(nodeData, function(d) { return d.value; })])
    	
    var xScale = d3.scaleBand()
    	.range([0, width])
    	.round(true)
    	.padding(0.5)
    	.domain(nodeData.map(function(d) { return d.key }))
    var svg = d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height + 50)
    	.style("margin", 50)
		
    svg.append('g')
      .attr("transform", "translate(0, " + height + ")")
    	.call(d3.axisBottom(xScale))
    svg.append('g').call(d3.axisLeft(yScale))
    
    bars = svg.selectAll('.bar').data(nodeData).enter()
      
    bars.append("rect")
	    //.classed('.bar', true)
      .attr("height", function(d) { return height - yScale(d.value) })
      .attr("width", function(d) { return xScale.bandwidth()})
    	//.attr("x", function(d) { return xScale(d.key) })
    	.attr("y", function(d) { return yScale(d.value) })
			.attr("transform", function(d) { return "translate(" + xScale(d.key) + ",0)"; })
    bars.append("text")
//   each text's x coord inherit from each g's transform-translate, after translate, each rect's topLeft corner its origin as (0, 0)
      .attr("x", function(d) { return xScale(d.key) + xScale.bandwidth() / 2 - 10 })
      .attr("y", function(d) { return yScale(d.value) - 15; })
      .attr("dy", "0.5em")// it seems change y position
      .text(function(d) { return d.value; });
  </script>
</body>

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