Examples

Next few dummy paragraphs should display and fade in as we scroll down the web page.


Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptas amet a accusamus eos numquam sint rerum, ipsum aperiam tempore, dolor, sed ex? Corrupti obcaecati, atque ab ullam cum et nam!

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.


Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.


WhenInViewport comes with jQuery adapter included - for this small slick animation all we had to write was following code.


            $('.fadeInParagraph').whenInViewport(function($paragraph) {
                $paragraph.addClass('inViewport');
            });
        

Same result in plain javascript (without jQuery) is achieved like so:



            var elements = Array.prototype.slice.call(
                document.getElementsByClassName('fadeInParagraph')
            );

            elements.forEach(function(element) {
                new WhenInViewport(element, function(elementInViewport) {
                    elementInViewport.classList.add('inViewport');
                });
            });

        

Styling was done as simple css transition that was trigged when new class was applied to element.