viewbox test

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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; }
    #cont{
      width:500px;
      text-align: center;
      position: relative;
      width: 30%;
      Font-Family: 'Open Sans',sans-serif;
      height:auto;
    }
    
    svg{
      background:red;
    }
  </style>
</head>
<div id="cont">
    <svg viewBox="0 0 100 10">
    </svg>
  <div>something else</div>
</div>
<div>
  Other content
</div>
<body>
  <script>
​
  </script>
</body>
​
    

https://d3js.org/d3.v4.min.js