D3.js Gantt Chart

var tasks; d3.json('http://localhost:8080/result', function(error, data) { tasks = data data.forEach(function(d) { d.startDate = new Date(d.maxTime['$date']); d.endD

Solution 1:

Try

d.startDate = new Date(d.maxTime.$date);   
d.endDate = new Date(d.minTime.$date);   

or

d.startDate = new Date(d.maxTime["$date"]);   
d.endDate = new Date(d.minTime["$date"]);