ng-infinite scroll angular setting offset - angularjs

Question

Need to keep track of my offset so that I can get the next set each time either scroll or click 'Load more'. It improves performance. I am trying out here by setting offset and limit and passing as request params to my node server,but how to update or increment after that limit using offset:
my url as: /foo?limit=7&&offset=0;
My angular controller function as:
$scope.findDetails = function(){
var limit = 10;
var offset = 0;
//DataService.getUsers(limit,offset).then(function(customerdetails){
DataService.getUsers({limit,offset},function(customerdetails){
$scope.customers = customerdetails;
}, function(error){
$scope.status = 'Unable to load customer data: ' + error.message;
});
};

Answer 1

You must keep the offset in the scope of the controller and update the offset every time the infinite directive request more records to display:
$scope.limit = 10;
$scope.offset = 0;
//bind this function to the ng-infinite directive
$scope.infiniteScrollFunction = function() {
$scope.offset += $scope.limit;
$scope.findDetails();
};
$scope.findDetails = function() {
DataService.getUsers({limit: $scope.limit,offset: $scope.offset},
function(customerdetails){
...
}

Answer 2

var $scope.height = $('#div-height').height()
var flag = false;
var $scope.customers = []
$(window).scroll(function() {
if ($(this).scrollTop() > $scope.height-2000) {
if (!flag) {
flag = true;
refreshCustomers();
}
}
});
function refreshCustomers() {
DataService.getCustomers().then(function (data) {
$scope.customers = $scope.customers.concat(data);
setTimeout(function () {
$scope.height = $('#div-height').height();
flag = false
}, 0.1);
});
}
In DataService
factory.getCustomers = function(){
return $http.get(...api......&&limit=7).then(function (results) {
var customers = results.data.customers;
return customers;
});
};
Now after the window is scrolled up to certain height(windowHeight-2000px), the api is called again to get data. The previous data is being concatenated with present data.