examples/backpack-demo/index.html

<!doctype html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Blockly Demo: Backpack</title>
    <script src="./node_modules/blockly/blockly_compressed.js"></script>
    <script src="./node_modules/blockly/blocks_compressed.js"></script>
    <script src="./node_modules/blockly/msg/en.js"></script>
    <script src="./node_modules/@blockly/workspace-backpack/dist/index.js"></script>
    <script src="./notification_backpack.js"></script>
    <script src="./index.js"></script>
    <style>
      body {
        background-color: #fff;
        font-family: sans-serif;
      }
      h1 {
        font-weight: normal;
        font-size: 140%;
      }
    </style>
  </head>
  <body onload="init()">
    <p>
      This is a demo of two Blockly instances with a custom Backpack "sharing"
      Backpack contents.
    </p>

    <table width="100%">
      <tr>
        <td>
          <div id="primaryDiv" style="height: 480px; width: 600px"></div>
        </td>
        <td>
          <div id="secondaryDiv" style="height: 480px; width: 600px"></div>
        </td>
      </tr>
    </table>
  </body>
</html>