<!doctype html>
<html>
    <head>
        <script src="../dist/core/js/jsplumb.core.umd.js"></script>
        <script src="../dist/browser-ui/js/jsplumb.browser-ui.umd.js"></script>
    </head>
    <body>

        <div style="width:500px;height:1500px;outline:1px solid blue;position:relative;" id="canvas">
            <div id="d1" style="width:50px;height:50px;top:50px;left:50px;position:absolute;outline:1px solid"></div>
            <div id="d2" style="width:50px;height:50px;top:150px;left:50px;position:ab