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showing results for - "javascript check if element is visible on scroll"
Noel
30 Nov 2017
1function isOnScreen(elem) {
2	// if the element doesn't exist, abort
3	if( elem.length == 0 ) {
4		return;
5	}
6	var $window = jQuery(window)
7	var viewport_top = $window.scrollTop()
8	var viewport_height = $window.height()
9	var viewport_bottom = viewport_top + viewport_height
10	var $elem = jQuery(elem)
11	var top = $elem.offset().top
12	var height = $elem.height()
13	var bottom = top + height
14
15	return (top >= viewport_top && top < viewport_bottom) ||
16	(bottom > viewport_top && bottom <= viewport_bottom) ||
17	(height > viewport_height && top <= viewport_top && bottom >= viewport_bottom)
18}
19
20jQuery( document ).ready( function() {
21	window.addEventListener('scroll', function(e) {
22		if( isOnScreen( jQuery( '.shipping-logos' ) ) ) { /* Pass element id/class you want to check */
23			alert( 'The specified container is in view.' );
24 		}	
25	});
26});
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