Custom script for Coffee Fest. Activates prev/next pagination for each schedule day when more than 6 events exist per day. Visible in action here: https://www.coffeefest.com/venues/details/coffee-fest-nashville-2017#schedule

activate-pagination.js

// Activate pagination when more than 6 events display per day
function pagination() {
	var schedulerEvent = $('#events .event');
	var prevButton = $('#events .prev');
	var nextButton = $('#events .next');
	var currentPage = "page_1"; // begin as statically defined, will always start on page_1

	// If user is on page 1, add inactive class to Prev link
	function disablePrev() {
		if (currentPage === "page_1") {
			prevButton.addClass("inactive");
		}
	}

	// Calculate number of event pages, disable nextButton on last page
	function disableNext() {
		var numberOfPages = Math.ceil(schedulerEvent.length/6);
		var disableNext = "page_" + numberOfPages;
		disableNext.toString();

		if (currentPage === disableNext) {
			nextButton.addClass("inactive");
		}
	}

	// Run both button activity checks on page load, also run on button clicks below
	disablePrev();
	disableNext();

	// Trigger previous page of events when Prev link is clicked
	prevButton.on('click', function(e) {
		e.preventDefault();
		disablePrev();

		if (prevButton.hasClass('inactive')) {
			return false; // do nothing if prev link has inactive class
		} else {
			// If user successfully clicks prev, always enable next link
			nextButton.removeClass("inactive");

			// If user is on page 2 and clicks prev, always add inactive class
			if (currentPage === "page_2") {
				prevButton.addClass("inactive");
			}

			// Turn page value into an object and hide matching elements
			var currentPageObject = "." + currentPage;
			$("" + currentPageObject + "").hide();

			// Do some string manipulation to extract number value from string 
			var pageNumberString = currentPage.split('_')[1]; // get just the  number				
			var pageNumber = parseInt(pageNumberString); // change string to a number

			// Decrement page number by 1 and then turn back into a string for use as class name
			pageNumber--;
			pageNumber.toString();

			// Make events with new matching page number appear
			var prevPage = ".page_" + pageNumber;
			$("" + prevPage + "").show();

			// Override current page setting to reflect new page number, return to beginning of function
			currentPage = "page_" + pageNumber;
			return currentPage;		
		}
	});

	// Trigger next page of events when Next link is clicked
	nextButton.on('click', function(e) {
		e.preventDefault();
		disableNext();

		// When user successfully clicks next, always enable prev link
		prevButton.removeClass("inactive");

		if (nextButton.hasClass('inactive')) {
			return false; // do nothing if next link has inactive class
		} else {
			// Hide events with current matching number
			var currentPageObject = "." + currentPage;
			$("" + currentPageObject + "").hide();

			// Do some string manipulation to pull page number from classname 			
			var pageNumberString = currentPage.split('_')[1]; // get just the  number				
			var pageNumber = parseInt(pageNumberString); // change string to a number

			// Increment page number by 1 and then turn back into a string for use as class name
			pageNumber++;
			pageNumber.toString();

			// Make events with new matching number appear
			var nextPage = ".page_" + pageNumber;
			$("" + nextPage + "").show();

			// Override current page setting to reflect new page number, return to beginning of function
			currentPage = "page_" + pageNumber;
			return currentPage;
		}
	});		
}