facetwp worked part

facetwp-loadmore.js

(function($) {
		window.fwp_is_paging = false;

		$(document).on('facetwp-refresh', function() {
			if (! window.fwp_is_paging) {
				window.fwp_page = 1;
				FWP.extras.per_page = 'default';
				if (FWP.loaded) {
					$('#pagination .container').prepend('<div class="decom-loading">Loading...</div>');
				}
			}
			window.fwp_is_paging = false;


		});

		$(document).on('facetwp-loaded', function() {

			window.fwp_total_rows = FWP.settings.pager.total_rows;
			if (! FWP.loaded) {

				window.fwp_default_per_page = FWP.settings.pager.per_page;

				window.addEventListener('scroll', function() {
					var element = document.querySelector('#colophon');
					var position = element.getBoundingClientRect();


					// checking for partial visibility
					if(position.top < window.innerHeight && position.bottom >= 0) {
						console.log('Element is partially visible in screen');

						var rows_loaded = (window.fwp_page * window.fwp_default_per_page);
						if (rows_loaded < window.fwp_total_rows) {

							console.log(rows_loaded + ' of ' + window.fwp_total_rows + ' rows');
							
							window.fwp_page++;
							window.fwp_is_paging = true;
							FWP.extras.per_page = (window.fwp_page * window.fwp_default_per_page);
							FWP.soft_refresh = true;
							FWP.refresh();
						}

					}
				});

			}

			$('.decom-loading').remove();

		});
	})(jQuery);