D3 Examples - enterAppend

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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; }
    svg {
      width: 900px;
      height: 900px;
    }
  </style>
</head>
​
<body>
  
<!--   <svg>
    <rect />
    <rect />
    <rect />
    <rect />
    <rect />
  </svg> -->
  
  <svg></svg>
  
  
  
  
  <script>
    const height = 600;
    const rectWidth = 100;
    const data = [100, 250, 175, 200, 120]
    
//     var rect = d3.selectAll('rect')
    var svg = d3.select('svg');
    svg.selectAll('rect')
    .data(data)
    .enter().append('rect')
    .attr('x', (d, i)=> i * rectWidth)
    .attr('y', d => height - d)
    .attr('width', rectWidth)
    .attr('height', d => d)
    .attr('fill', 'blue')
    .attr('stroke', '#fff')
//     console.log(rect);
​
​
    
​
  </script>
</body>
​
    