Sankey Diagram

A basic Sankey diagram which I want to be clickable. Slightly modified version of the example found here - https://developers.google.com/chart/interactive/docs/gallery/sankey.

by Lakshay Akula

HTML

<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<div id="sankey_basic" style="width: 900px; height: 300px;"></div>

JavaScript

google.load('visualization', '1.1', {packages: ['sankey']});      
google.setOnLoadCallback(drawChart);

function drawChart() {
    var data = new google.visualization.DataTable();
    data.addColumn('string', 'From');
    data.addColumn('string', 'To');
    data.addColumn('number', 'Weight');
    data.addRows([
        [ 'A', 'X', 5 ],
        [ 'A', 'Y', 7 ],
        [ 'A', 'Z', 6 ],
        [ 'B', 'X', 2 ],
        [ 'B', 'Y', 9 ],
        [ 'B', 'Z', 4 ]
    ]);
          
    // Sets chart options.
    var options = {
        width: 600,
    };

    // Instantiates and draws our chart, passing in some options.
    var chart = new        
    google.visualization.Sankey(document.getElementById('sankey_basic'));
          
    google.visualization.events.addListener(chart, 'select', selectHandler);
      
    chart.draw(data, options);
}

function selectHandler(e) {
    alert('The user selected' + orgChart.getSelection().length + ' items.');
}