D3 Examples - Scale-Axes

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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>
​
<body>
  <svg></svg>
  <script>
    const data = [100,120,53,74,95, 42, 87, 35, 150];
    const rectWidth = 40,
          height = 150;
    const svg = d3.select('svg')
        .attr('transform', 'translate(40,20)');
    
//     const extent = d3.extent(data);
    
    const yScale = d3.scaleLinear()
        .domain([height,0])
        .range([0,150]);
    
    const yAxis = d3.axisLeft()
        .scale(yScale);
    
    svg.append('g')
        .attr('transform', `translate(40, 0)`)
        .call(yAxis)
    
//     console.log(extent); 
​
    const xScale = d3.scaleLinear()
        .domain([0, data.length])
        .range([0,rectWidth * data.length]);
    
    const xAxis = d3.axisBottom()
        .scale(xScale);
    
    svg.append('g')
        .attr('transform', 'translate(40, 150)')
        .call(xAxis);
    
    
    const enter = 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', 'white')
        .attr('transform', 'translate(40,1)');
​
    
//     console.log(enter.nodes());
//     console.log(enter.data());
    
    // d3.scaleLinear()
    //   .domain([min, max]) // input
    //   .range([min, max]); // output
    // map (0,100) to (0,1) :: domain to range
  </script>
</body>
​
    