Area chart v3

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.x.axis path {
  display: none;
}

.line {
  fill: steelblue;
  stroke: steelblue;
  stroke-width: 1.5px;
}    
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)
      .attr("transform", "translate(50, 10)");
    
   
var data = Array.from({length: 10}, () => Math.floor(Math.random() * 9 + 1));
var width = 500, height = 500;

var x = d3.scale.linear()
    .range([0, width])
    .domain([0, data.length -1]);

var y = d3.scale.linear()
    .range([height, 0])
    .domain([0, 10]);

var line = d3.svg.area()
    .x(function(d, i) { return x(i); })
    .y1(function(d) { return y(d); })
    .y0(height)
    .interpolate('cardinal');

svg.append("path")
      .datum(data)
      .attr("class", "line")
      .attr("d", line);
    
    
  </script>
</body>

https://d3js.org/d3.v3.min.js