Is it feasible in JavaScript to initiate a function when an element, like a div, becomes visible on the screen?
I am working on an infinite grid that expands in both directions, and I want to fetch elements dynamically through AJAX as the user scrolls.
Appreciate any help!
To determine if the scrollbar is close to the end, you can use a snippet like this (if jQuery is being used):
$('#my-container').scroll(function(e) {
var tolerance = 0;
var $el = $(this);
if ($el[0].scrollTop + $el.height() >= $el[0].scrollHeight - tolerance) {
// Perform your ajax action here
}
});
UPDATE: To verify if an element is within the viewport, consider using the viewport plugin (or alternatively, apply the same concept to any container aside from the window)
If you want to find out the scroll position, you can utilize document.body.scrollTop and document.body.scrollLeft.
By the way, gpilotino beat me to it and shared some helpful code earlier!
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