first commit

assets/plugin/timeline/js/main.js

@@ -0,0 +1,26 @@
+jQuery(document).ready(function($){
+	var timelineBlocks = $('.cd-timeline-block'),
+		offset = 0.8;
+
+	//hide timeline blocks which are outside the viewport
+	hideBlocks(timelineBlocks, offset);
+
+	//on scolling, show/animate timeline blocks when enter the viewport
+	$(window).on('scroll', function(){
+		(!window.requestAnimationFrame) 
+			? setTimeout(function(){ showBlocks(timelineBlocks, offset); }, 100)
+			: window.requestAnimationFrame(function(){ showBlocks(timelineBlocks, offset); });
+	});
+
+	function hideBlocks(blocks, offset) {
+		blocks.each(function(){
+			( $(this).offset().top > $(window).scrollTop()+$(window).height()*offset ) && $(this).find('.cd-timeline-img, .cd-timeline-content').addClass('is-hidden');
+		});
+	}
+
+	function showBlocks(blocks, offset) {
+		blocks.each(function(){
+			( $(this).offset().top <= $(window).scrollTop()+$(window).height()*offset && $(this).find('.cd-timeline-img').hasClass('is-hidden') ) && $(this).find('.cd-timeline-img, .cd-timeline-content').removeClass('is-hidden').addClass('bounce-in');
+		});
+	}
+});