creator.html

<!DOCTYPE HTML>
<html>
  <head>
    <link rel="stylesheet" href="graph-creator.css" />
  </head>

  <body>

    <div id="toolbox">
      <input type="file" id="hidden-file-upload"><input id="upload-input" type="image" title="upload graph" src="upload-icon.png" alt="upload graph"> <input type="image" id="download-input" title="download graph" src="download-icon.png" alt="download graph"> <input type="image" id="delete-graph" title="delete graph" src="trash-icon.png" alt="delete graph">
    </div>

    <!--<script src="//d3js.org/d3.v3.js" charset="utf-8"></script>-->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.js" charset="utf-8"></script>
    <script src="//cdn.jsdelivr.net/filesaver.js/0.1/FileSaver.min.js"></script>
    <script src="graph-creator.js"></script>
  </body>

</html>