D3 Examples - D3 bar chart without data-binding

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    rect {
      fill: purple;
      stroke: none;
      stroke-width: 1;
    }
  </style>
</head>
​
<body>
  <script>
​
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);
        
​
    
//    console.log("scale", 100, y(100));
    
    var data = [121, 32, 21, 23, 10, 22, 11, 19, 30, 39, 22, 32, 21, 23, 10, 22, 11, 19, 30, 10];
    
   var x = d3.scaleLinear()
        .domain([0, data.length]) // Ceci rend proportionnelle
        .range([0, 10]);
    
   var y = d3.scaleLinear()
        .domain([0, d3.max(data)]) // Ceci rend proportionnelle
        .range([0, 100]);
    
        svg.selectAll("rect").data(data).enter()
    .append("rect")
    .attr("width", 20 )
    .attr("height", function(d) {return y(d);})
    .attr("x", function (d, i) {return i * 960 / data.length;})
    .attr("y", function (d) {return 200-y(d);});
    
    
    //console.log(d3.length);
  </script>
</body>
​
    