Issues gantt

by mikecmpbll

HTML

<html>
<head>
  <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
</head>
<body>
  <div id="chart_div"></div>
</body>
</html>

JavaScript

google.charts.load('current', {'packages':['gantt']});
google.charts.setOnLoadCallback(drawChart);

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

  rows = JSON.parse("[[\"1801\",\"Groups not being cleared from students archived through Wonde (13)\",\"Resource 1\",\"2020-04-03T12:25:01.791+01:00\",\"2020-04-08T12:25:01.791+01:00\",null,50,null],[\"1722\",\"Do something to alerts when incidents/actions are deleted (8)\",\"Resource 2\",\"2020-04-03T12:25:01.796+01:00\",\"2020-04-06T16:25:01.796+01:00\",null,50,null],[\"1175\",\"Alerts + notifications (13)\",\"Resource 3\",\"2020-04-03T12:25:01.798+01:00\",\"2020-04-17T12:25:01.798+01:00\",null,50,null],[\"1554\",\"Current monitored student numbers displaying rather than between dates (3)\",\"Resource 4\",\"2020-04-03T12:25:01.812+01:00\",\"2020-04-03T16:25:01.812+01:00\",null,50,null],[\"993\",\"Share saved reports with other users (3)\",\"Resource 5\",\"2020-04-03T12:25:01.813+01:00\",\"2020-04-03T16:25:01.813+01:00\",null,50,null],[\"359\",\"Add CPOMS Admin user in migration + seed (2)\",\"Resource 4\",\"2020-04-03T16:25:01.812+01:00\",\"2020-04-06T12:25:01.812+01:00\",null,50,null],[\"962\",\"Long category names break free (1)\",\"Resource 5\",\"2020-04-03T16:25:01.813+01:00\",\"2020-04-07T12:25:01.813+01:00\",null,50,null],[\"599\",\"Replace GCM with FCM (2)\",\"Resource 4\",\"2020-04-06T12:25:01.812+01:00\",\"2020-04-08T12:25:01.812+01:00\",null,50,null],[\"1446\",\"Make attendance trend icon more granular (2)\",\"Resource 2\",\"2020-04-06T16:25:01.796+01:00\",\"2020-04-08T16:25:01.796+01:00\",null,50,null],[\"1324\",\"Linked students for deleted linked...