angularjs1.X获取前一天日期

 $scope.getDate = new Date();

             //可以当前日期
             $scope.nowDate = $filter("date")($scope.getDate, "yyyy-MM-dd");
             //获取前一天日期
             $scope.oldDate = $filter("date")($scope.getDate - 86400000, "yyyy-MM-dd");
             console.log($scope.nowDate,$scope.oldDate);

　　注意：记得依赖注入$filter

　　输出：2017-10-20 2017-10-19