Template:Greece/AOS js

/* This is actually AniView*/ (function($) {

   //custom scroll replacement to allow for interval-based 'polling'
   //rather than checking on every pixel.
   var uniqueCntr = 0;
   $.fn.scrolled = function(waitTime, fn) {
       if (typeof waitTime === 'function') {
           fn = waitTime;
           waitTime = 200;
       }
       var tag = 'scrollTimer' + uniqueCntr++;
       this.scroll(function() {
           var self = $(this);
           clearTimeout(self.data(tag));
           self.data(tag, setTimeout(function() {
               self.removeData(tag);
               fn.call(self[0]);
           }, waitTime));
       });
   };

   $.fn.AniView = function(options) {

       //some default settings. animateThreshold controls the trigger point
       //for animation and is subtracted from the bottom of the viewport.
       var settings = $.extend({
           animateThreshold: 0,
           scrollPollInterval: 20
       }, options);

       //keep the matched elements in a variable for easy reference
       var collection = this;

       //cycle through each matched element and wrap it in a block/div
       //and then proceed to fade out the inner contents of each matched element
       $(collection).each(function(index, element) {

$(element).wrap('

');

           $(element).css('opacity', 0);
       });

       /**
        * returns boolean representing whether element's top is coming into bottom of viewport
        *
        * @param HTMLDOMElement element the current element to check
        */
       function EnteringViewport(element) {
           var elementTop = $(element).offset().top;
           var viewportBottom = $(window).scrollTop() + $(window).height();
           return (elementTop < (viewportBottom - settings.animateThreshold)) ? true : false;
       }

       /**
        * cycle through each element in the collection to make sure that any
        * elements which should be animated into view, are...
        *
        * @param collection of elements to check
        */
       function RenderElementsCurrentlyInViewport(collection) {
           $(collection).each(function(index, element) {
               var elementParentContainer = $(element).parent('.av-container');
               if ($(element).is('[data-av-animation]')){

if(!$(elementParentContainer).hasClass('av-visible')){ if(EnteringViewport(elementParentContainer)) { $(element).css('opacity', 1); $(elementParentContainer).addClass('av-visible'); $(element).addClass('animated ' + $(element).attr('data-av-animation')); } } }

           });
       }

       //on page load, render any elements that are currently/already in view
       RenderElementsCurrentlyInViewport(collection);

       //enable the scrolled event timer to watch for elements coming into the viewport
       //from the bottom. default polling time is 20 ms. This can be changed using
       //'scrollPollInterval' from the user visible options
       $(window).scrolled(settings.scrollPollInterval, function() {
           RenderElementsCurrentlyInViewport(collection);
       });
   };

})(jQuery);