D3 Examples - Selections and Filter

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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: 100%;
      height: 100%;
    }
  </style>
</head>
<svg>
  <rect />
  <rect />
  <rect />
  <rect />
  <rect />
</svg>
<body>
  <script>
    const rectWidth = 200;
    const height = 300;
        const data = [225, 250, 150, 100, 75];
        
    d3.selectAll('rect')
        .data(data)
        .filter((element) => element > 150)
        .attr('x', (d, i) => i * rectWidth)
        .attr('y', d => height - d)
        .attr('width', rectWidth)
        .attr('height', d => d)
        .attr('fill', 'purple')
        .attr('stroke', '#fff');
    
    // notice here that only 2 bar charts are shown
  </script>
</body>
​
    