gantt chart tutorial - google charts examples

Code

<html>
<head>
  <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
  <script type="text/javascript">
    google.charts.load('current', {'packages':['gantt']});
    google.charts.setOnLoadCallback(drawChart);

function daysToMilliseconds(days) {
      return days * 24 * 60 * 60 * 1000;
    }

function drawChart() {

var data = new google.visualization.DataTable();
      data.addColumn('string', 'Task ID');
      data.addColumn('string', 'Task Name');
      data.addColumn('date', 'Start Date');
      data.addColumn('date', 'End Date');
      data.addColumn('number', 'Duration');
      data.addColumn('number', 'Percent Complete');
      data.addColumn('string', 'Dependencies');

data.addRows([
        ['Research', 'Find sources',
         new Date(2017, 0, 2), new Date(2017, 0, 6), null,  110,  null],
        ['Write', 'Write paper',
         null, new Date(2017, 0, 10), daysToMilliseconds(3), 35, 'Research,Outline'],
        ['Cite', 'Create bibliography',
         null, new Date(2017, 0, 8), daysToMilliseconds(1), 30, 'Research'],
        ['Complete', 'Hand in paper',
         null, new Date(2017, 0, 11), daysToMilliseconds(1), 10, 'Cite,Write'],
        ['Outline', 'Outline paper',
         null, new Date(2017, 0, 7), daysToMilliseconds(1), 110, 'Research']
      ]);

var options = {
        height: 175
      };

var chart = new google.visualization.Gantt(document.getElementById('chart_div'));

chart.draw(data, options);
    }
  </script>
</head>
<body>
  <div id="chart_div"></div>
</body>
</html>

Result