index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
</head>
<style>
.viz-area .area{
fill: red;
fill-opacity:0.2;
stroke: none;
}
.viz-line .line{
fill: none;
stroke: red;
stroke-width:3px;
}
</style>
<body>
<svg width="960" height="600">
<g transform="translate(50,50)"></g>
</svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="//vizjs.org/viz.v1.3.0.min.js"></script>
<script>
var area = viz.area()
.data(randomData())
.curve(d3.curveBasis)
var line = viz.line().data(area.data())
.value(function(d){ return d.value;})
.valueScale(area.valueScale())
.curve(area.curve())
d3.select("g").call(area).call(line)
function randomData(){
return d3.range(20).map(function(i){ return {key:i, value: Math.random()}; });
}
</script>