Syntax Error in Jquery

Question

I have .filter to pick data between two given dates,code is working in chrome and firefox but giving error in Internet explorer

 

Below is code 

 

var resultWeekelyData = $scope.data1W.filter(a => {

var date = new Date(a.date);

return (date >= startDate && date <= endDate);

});

 

$scope.data1W is an array 

 

Please let me know how to filter data between two given date using jquery.

 

Stuck on this.