D3-linechart-update-with-tooltip

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<!DOCTYPE html>
<head>
  <title>heatmap</title>
  <meta charset="utf-8">
  <link rel="stylesheet" href="style.css">
</head>
<body>
​
  <div class="click">
      
  </div>
    
  <div class="plot">
      <div class="tooltip">
          <div class="opacity-footer"></div>     
      </div>
      
  </div>
    
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="//d3js.org/d3.v4.min.js"></script>
  <script src="script.js"></script>
​
</body>
    

https://code.jquery.com/jquery-1.12.4.js

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