Exploring Methods for Retrieving offsetHeight and scrollHeight in AngularJS

I am currently developing a directive that requires three specific values:

  1. scrollTop
  2. offsetHeight

  3. scrollHeight

    projectModule.directive('scroller', function ($window) {
return {
restrict: 'A',
link: function (scope, elem, attrs) {
    var rawElement = angular.element($window);
    angular.element($window).bind('scroll', function () {
        var scrollTop = rawElement.scrollTop();
        var offsetHeight = rawElement.offsetHeight;
        var scrollHeight = rawElement.scrollHeight;
        console.log(scrollTop + " ," + offsetHeight + " ," + scrollHeight);
        scope.$apply();
        });
    };
});

While I can easily retrieve the scrollTop value using rawElement.scrollTop() function, I'm unsure how to obtain the offsetHeight and scrollHeight of that particular element.

I aim to implement this logic-

if ((rawElement.scrollTop + rawElement.offsetHeight + 5) >= rawElement.scrollHeight) {
    scope.$apply();    //For infinite scrolling
}

Thank you in advance.

javascriptangularjs

Answer №1

To achieve your goal, I recommend utilizing the $document service instead. This will give you access to both document.body.scrollHeight and document.body.offsetHeight. Here is a sample code snippet:

var offsetHeight = $document[0].body.offsetHeight;
var scrollHeight = $document[0].body.scrollHeight;

Answer №2

If $el represents the actual DOM element, can you utilize getBoundingClientRect?

var top = $el.getBoundingClientRect().top;

Example Link

An alternative approach could be

$el.prop('offsetTop')

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