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OnePage Navbar detecting section IDs above target

I am having trouble with my website's navigation bar.
It is supposed to detect and highlight the navigation link when the user has reached the Section ID. However, it seems to be detecting the section well above their target.
How would I get the navigation bar to accurately detect the sections?
Just in case, here's the jQuery smooth-scrolling code:
;(function($, window, document, undefined){
// our plugin constructor
var OnePageNav = function(elem, options){
this.elem = elem;
this.$elem = $(elem);
this.options = options;
this.metadata = this.$elem.data('plugin-options');
this.$win = $(window);
this.sections = {};
this.didScroll = false;
this.$doc = $(document);
this.docHeight = this.$doc.height();
};
// the plugin prototype
OnePageNav.prototype = {
defaults: {
navItems: 'a',
currentClass: 'current',
changeHash: false,
easing: 'swing',
filter: '',
scrollSpeed: 750,
scrollThreshold: 0.5,
begin: false,
end: false,
scrollChange: false
},
init: function() {
// Introduce defaults that can be extended either
// globally or using an object literal.
this.config = $.extend({}, this.defaults, this.options, this.metadata);
this.$nav = this.$elem.find(this.config.navItems);
//Filter any links out of the nav
if(this.config.filter !== '') {
this.$nav = this.$nav.filter(this.config.filter);
}
//Handle clicks on the nav
this.$nav.on('click.onePageNav', $.proxy(this.handleClick, this));
//Get the section positions
this.getPositions();
//Handle scroll changes
this.bindInterval();
//Update the positions on resize too
this.$win.on('resize.onePageNav', $.proxy(this.getPositions, this));
return this;
},
adjustNav: function(self, $parent) {
self.$elem.find('.' + self.config.currentClass).removeClass(self.config.currentClass);
$parent.addClass(self.config.currentClass);
},
bindInterval: function() {
var self = this;
var docHeight;
self.$win.on('scroll.onePageNav', function() {
self.didScroll = true;
});
self.t = setInterval(function() {
docHeight = self.$doc.height();
//If it was scrolled
if(self.didScroll) {
self.didScroll = false;
self.scrollChange();
}
//If the document height changes
if(docHeight !== self.docHeight) {
self.docHeight = docHeight;
self.getPositions();
}
}, 250);
},
getHash: function($link) {
return $link.attr('href').split('#')[1];
},
getPositions: function() {
var self = this;
var linkHref;
var topPos;
var $target;
self.$nav.each(function() {
linkHref = self.getHash($(this));
$target = $('#' + linkHref);
if($target.length) {
topPos = $target.offset().top;
self.sections[linkHref] = Math.round(topPos);
}
});
},
getSection: function(windowPos) {
var returnValue = null;
var windowHeight = Math.round(this.$win.height() * this.config.scrollThreshold);
for(var section in this.sections) {
if((this.sections[section] - windowHeight) < windowPos) {
returnValue = section;
}
}
return returnValue;
},
handleClick: function(e) {
var self = this;
var $link = $(e.currentTarget);
var $parent = $link.parent();
var newLoc = '#' + self.getHash($link);
if(!$parent.hasClass(self.config.currentClass)) {
//Start callback
if(self.config.begin) {
self.config.begin();
}
//Change the highlighted nav item
self.adjustNav(self, $parent);
//Removing the auto-adjust on scroll
self.unbindInterval();
//Scroll to the correct position
self.scrollTo(newLoc, function() {
//Do we need to change the hash?
if(self.config.changeHash) {
window.location.hash = newLoc;
}
//Add the auto-adjust on scroll back in
self.bindInterval();
//End callback
if(self.config.end) {
self.config.end();
}
});
}
e.preventDefault();
},
scrollChange: function() {
var windowTop = this.$win.scrollTop();
var position = this.getSection(windowTop);
var $parent;
//If the position is set
if(position !== null) {
$parent = this.$elem.find('a[href$="#' + position + '"]').parent();
//If it's not already the current section
if(!$parent.hasClass(this.config.currentClass)) {
//Change the highlighted nav item
this.adjustNav(this, $parent);
//If there is a scrollChange callback
if(this.config.scrollChange) {
this.config.scrollChange($parent);
}
}
}
},
scrollTo: function(target, callback) {
var offset = $(target).offset().top;
$('html, body').animate({
scrollTop: offset
}, this.config.scrollSpeed, this.config.easing, callback);
},
unbindInterval: function() {
clearInterval(this.t);
this.$win.unbind('scroll.onePageNav');
}
};
OnePageNav.defaults = OnePageNav.prototype.defaults;
$.fn.onePageNav = function(options) {
return this.each(function() {
new OnePageNav(this, options).init();
});
};
})( jQuery, window , document );

jQuery Appear Function

I'm trying to use the jQuery appear plugin. I'm having trouble making it work. I tried to attach it to the (window).scroll event but it makes the page slow. If I don't use the scroll, it only fires once. I need it to work again whenever the element becomes visible. Can you give me some tips on how to make it work.
Here's my code:
jQuery('.home-section-1').appear(function(){
jQuery('.page-scroll-indicator .fa.fa-circle').removeClass('active-ind');
jQuery('.page-scroll-indicator .section-1').addClass('active-ind');
});

As ɴ-ᴀ-ᴛ-ʜ said in his comment, you need to be using .on to listen for the appear event.
jQuery('.home-section-1').on('appear', function(){
jQuery('.page-scroll-indicator .fa.fa-circle').removeClass('active-ind');
jQuery('.page-scroll-indicator .section-1').addClass('active-ind');
});
Here's a code snippit showing it working, you'll notice that your method (Method 1) doesn't fire, while the method above (Method 2) does:
/*
* jQuery appear plugin
*
* Copyright (c) 2012 Andrey Sidorov
* licensed under MIT license.
*
* https://github.com/morr/jquery.appear/
*
* Version: 0.3.4
*/
(function($) {
var selectors = [];
var check_binded = false;
var check_lock = false;
var defaults = {
interval: 250,
force_process: false
}
var $window = $(window);
var $prior_appeared;
function process() {
check_lock = false;
for (var index = 0, selectorsLength = selectors.length; index < selectorsLength; index++) {
var $appeared = $(selectors[index]).filter(function() {
return $(this).is(':appeared');
});
$appeared.trigger('appear', [$appeared]);
if ($prior_appeared) {
var $disappeared = $prior_appeared.not($appeared);
$disappeared.trigger('disappear', [$disappeared]);
}
$prior_appeared = $appeared;
}
}
// "appeared" custom filter
$.expr[':']['appeared'] = function(element) {
var $element = $(element);
if (!$element.is(':visible')) {
return false;
}
var window_left = $window.scrollLeft();
var window_top = $window.scrollTop();
var offset = $element.offset();
var left = offset.left;
var top = offset.top;
if (top + $element.height() >= window_top &&
top - ($element.data('appear-top-offset') || 0) <= window_top + $window.height() &&
left + $element.width() >= window_left &&
left - ($element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
return true;
} else {
return false;
}
}
$.fn.extend({
// watching for element's appearance in browser viewport
appear: function(options) {
var opts = $.extend({}, defaults, options || {});
var selector = this.selector || this;
if (!check_binded) {
var on_check = function() {
if (check_lock) {
return;
}
check_lock = true;
setTimeout(process, opts.interval);
};
$(window).scroll(on_check).resize(on_check);
check_binded = true;
}
if (opts.force_process) {
setTimeout(process, opts.interval);
}
selectors.push(selector);
return $(selector);
}
});
$.extend({
// force elements's appearance check
force_appear: function() {
if (check_binded) {
process();
return true;
};
return false;
}
});
})(jQuery);
// Your method
jQuery('.home-section-1').appear(function(){
alert('Method 1');
});
// Using .on
jQuery('.home-section-1').on('appear', function(){
alert('Method 2');
});
.home-section-1 {
margin-top: 2000px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="home-section-1">Hello World</div>

Responsive Layout Issues - ONLY present on iPad. Unsure how to resolve

I'm having a few problems with my portfolio - if/when viewed on an iPad in vertical orientation, scrolling down seems to pull you back to the top. I'm not entirely sure if this is a css/js issue, or something else entirely. Resizing the browser on my computer to the same dimensions doesn't appear to replicate the problem so.. at a bit of a loss.
Has anyone encountered this issue?
Problem site in question:
http://alexandermasters.com/portfolio/weddings/20110827
This is an edited version of the theme template (template was designed strictly to scroll horizontally) but on the pages with the template untouched (http://alexandermasters.com/portfolio/travel/20100928) the issue persists.
Suggestions?
Edit: the offending code (within main.js) is below:
;(function ($, window, $window, $document, isUndefined) {
$(function () {
var $html = $('html'),
$main = $('#main'),
$header = $('#header'),
$footer = $('#footer'),
// Components
$sidebar = $('.sidebar'),
$keyRight = $('#key-right'),
$keyLeft = $('#key-left'),
$navTip = $('.nav-tip'),
$scrollContainer = $('.scroll-container'),
mobileNav,
// Functions
getHorizontalPageHeight,
pageResizer,
// Gloal variables
allowUpscale = $html.is('.upscale');
if (iPadWithIOS4()) {
$html.addClass('ipad-ios4');
}
getHorizontalPageHeight = function () {
return $window.height() - $header.outerHeight() - $footer.outerHeight();
};
/**
* Fixes iOS 7.0~7.0.2 Safari bug. Safari reports $window.height() to be 692, which is not correct.
* Also there's a permanent scrollbar which allows users to scroll 20px, to prevent that we just scroll back to the
* top. This is only required in landscape mode.
*/
if (!!navigator.platform.match(/iPad/) && $html.is('.horizontal-page')) {
var _getHorizontalPageHeight = getHorizontalPageHeight,
IOS7PreventVerticalScroll = function () {
if ($(window).scrollTop() > 0) {
$('body').animate({ scrollTop: 0 }, 200);
}
};
getHorizontalPageHeight = function () {
if ($window.height() == 692) {
return window.innerHeight - $header.outerHeight() - $footer.outerHeight();
}
return _getHorizontalPageHeight();
};
$document.on('scroll', _.debounce(IOS7PreventVerticalScroll, 100));
$window.on('orientationchange.ios7-safari-bug.fluxus', function () {
setTimeout(function () {
if ($window.height() == 692) {
IOS7PreventVerticalScroll();
}
}, 200);
});
}
$('.horizontal-page').each(function () {
var resizer = function () {
var windowWidth = $window.width(),
windowHeight = $window.height(),
// The header is position:fixed we have to calculate the offset for main page dynamically.
headerHeight = $header.outerHeight();
footerHeight = $footer.outerHeight();
// If we are on a small screen
if (windowWidth <= 480) {
if ($html.is('.no-scroll')) {
$main.css({
height: windowHeight - headerHeight,
top: 0
});
} else {
$main.css({
height: 'auto',
top: 0
});
}
} else {
$main.css({
height: getHorizontalPageHeight(),
top: headerHeight
});
}
};
$window.on('resize.horizontal-page.fluxus', _.debounce(resizer));
resizer();
$window.on('orientationchange.horizontal-page.fluxus', function () {
setTimeout(resizer, 10);
});
$main.transition({
opacity: 1
}, 100);
});
/**
* General size adjustments on window resize.
*/
pageResizer = function () {
/**
* Update tinyscrollbar values.
*/
$scrollContainer.each(function () {
var $t = $(this),
tsb = $t.data('tsb');
$t.find('.scrollbar, .track').css('height', $t.height());
tsb && tsb.update();
});
if ($window.width() <= 768) {
// Initialize mobile menu only if we have a small sceen size.
if (!mobileNav) {
// Make mobile menu item array.
var $siteNavigation = $('.site-navigation'),
$mobileNavItems = $siteNavigation.find('a').filter(function () {
var $t = $(this),
level = $t.parents('ul').length;
$t.data('level', level);
if (level == 1) {
return true;
} else {
if ($t.closest('.current-menu-item, .current_page_ancestor').length) {
return true;
}
}
return false;
});
/**
* Initialize mobile menu.
*/
mobileNav = new MobileNav($mobileNavItems, {
openButtonTitle: $siteNavigation.data('menu'),
active: $siteNavigation.find('.current-menu-item > a')
});
}
}
/**
* Trigger vertical center plugin.
*/
setTimeout(function () {
$('.js-vertical-center').verticalCenter();
}, 100);
};
$window.on('resize.page-resizer.fluxus', _.debounce(pageResizer));
pageResizer();
/**
* Arrows and mousewheel navigation plugin.
*/
globalNav = new Navigation({
onSetItems: function () {
this.$items.length && $navTip.show();
}
});
/**
* Full page slider
*/
$('.slider').each(function () {
var $slider = $(this),
slider;
$slider.fluxusSlider({
onNextSlide: function () {
globalNav.options.onNextItem();
},
onPreviousSlide: function () {
globalNav.options.onPreviousItem();
}
});
slider = $slider.data('slider');
slider.slideCount > 1 && $navTip.show();
globalNav.disableKeyboard();
$keyRight.click(function (e) {
slider.next();
e && e.preventDefault();
});
$keyLeft.click(function (e) {
slider.previous();
e && e.preventDefault();
});
});
/**
* Appreciate plugin
*/
var $appreciate = $('.btn-appreciate');
$appreciate.appreciate();
/**
* Sharrre plugin
*/
$('#sharrre-footer').each(function () {
var $el = $(this),
services = {},
buttonsTitle = $el.data('buttons-title');
if (!$el.data('services')) {
return;
}
// retrieve social networks from DOM element.
$.each($el.data('services').split(','), function () {
services[this] = true;
});
$el.sharrre({
share: services,
buttonsTemplate: buttonsTitle ? '<b>' + buttonsTitle + '</b>' : '',
urlCurl: $el.data('curl'),
template: '<b class="share">{title}</b>' +
'<span class="counts">' +
(services.facebook ? '<b class="count-facebook">{facebook}</b>' : '') +
(services.twitter ?'<b class="count-twitter">{twitter}</b>' : '') +
(services.googlePlus ?'<b class="count-plus">{plus}</b>' : '') +
'</span>',
render: function(self, options) {
var html = this.template.replace('{title}', options.title);
html = html.replace('{facebook}', options.count.facebook);
html = html.replace('{twitter}', options.count.twitter);
html = html.replace('{plus}', options.count.googlePlus);
$(self.element).html(html);
$el.show();
}
});
});
$('#sharrre-project').each(function () {
var $el = $(this),
services = {},
buttonsTitle = $el.data('buttons-title');
if (!$el.data('services')) {
return;
}
// retrieve social networks from DOM element.
$.each($el.data('services').split(','), function () {
services[this] = true;
});
$el.sharrre({
share: services,
buttonsTemplate: buttonsTitle ? '<div class="arrow"></div><b>' + buttonsTitle + '</b>' : '',
urlCurl: $el.data('curl'),
template: '<span class="icon"></span><div class="box">' +
'<a class="share" href="#">{title}</a>' +
'<b class="count-total">{total}</b>' +
'</div>',
render: function(self, options) {
var total = options.shorterTotal ? self.shorterTotal(options.total) : options.total,
html = this.template.replace('{title}', options.title).replace('{total}', total);
$(self.element).html(html);
$el.css('display', 'inline-block');
},
afterLoadButtons: function () {
var index = 0,
$buttons = this.$el.find('.button'),
count = $buttons.each( function () {
index++;
$(this).addClass('button-' + index);
}).length;
this.$el.addClass('social-services-' + count);
}
});
});
/**
* Fixes menu issue, when popup is outside the screen.
*/
$('.site-navigation .has-children').hover(function () {
var $submenu = $(this).children('.sub-menu');
if ($submenu.length) {
// if popup is outside the screen, then align it by the right side of the screen.
if ($submenu.offset().left + $submenu.outerWidth() - $(document).scrollLeft() > $window.width()) {
$submenu.addClass('sub-menu-right');
}
}
}, function () {
$(this).children('.sub-menu').removeClass('sub-menu-right');
});
/**
* If our page has a horizontal layout.
*/
if ($html.is('.horizontal-page')) {
/**
* Enable tinyscrollbar plugin.
*/
$scrollContainer.tinyscrollbar({
axis: 'y'
});
/**
* Enable keyboard navigation.
*/
globalNav.options.onNextItem = function () {
$keyRight.addClass('flash');
setTimeout(function () {
$keyRight.removeClass('flash');
}, 200);
};
globalNav.options.onPreviousItem = function () {
$keyLeft.addClass('flash');
setTimeout(function () {
$keyLeft.removeClass('flash');
}, 200);
};
$keyRight.click(function (e) {
globalNav.nextItem();
e && e.preventDefault();
});
$keyLeft.click(function (e) {
globalNav.previousItem();
e && e.preventDefault();
});
}

According to Intheme, the author of the Fluxus Template, the following fix has been released that should solve the issue.
By modifying the following line of code in js/main.js
if (!!navigator.platform.match(/iPad/)) {
to this
if (!!navigator.platform.match(/iPad/) && $html.is('.horizontal-page')) {

Javascript Viewport Fade In Fade Out

I'm trying to accomplish something so simple it's painful, but I've yet to have luck after hours of work.
I have 4 divs, each with the class '.slide'. All I want to do is have them invisible, but fade in when they are in the viewport. If they leave the viewport, they should return to invisible. Any ideas?
$('.slide').waypoint(
function() {
if( $(this).is(":in-viewport") ) {
$(this).animate({
opacity: 1
}, 100);
}
$('.slide').not(this).animate({
opacity: 0
}, 100);
},
{
offset: function() {
return $.waypoints('viewportHeight') - document.getElementById('navigation').clientHeight;
}
}
);
http://jsfiddle.net/Agdax/3/

So i played a little and got this:
/*jslint browser: true */
/*global $ */
(function () {
'use strict';
var invisibleClassName = 'invisible',
scrollWait = 500;
function isInvisible(el) {
var wh = $(window).height(),
wt = $(window).scrollTop(),
eh = $(el).height(),
et = $(el).offset().top;
return ((wh + wt) <= et || wt >= (et + eh));
}
function checkVisibleAll(elements) {
elements.each(function () {
$(this)[(isInvisible(this) ? 'add' : 'remove') + 'Class'](invisibleClassName);
});
}
$.fn.visible = function () {
var elements = this,
scrollTimer = null;
// Don't check too often
function scrolled() {
clearTimeout(scrollTimer);
scrollTimer = setTimeout(function () {
checkVisibleAll(elements);
}, scrollWait);
}
// Onload
checkVisibleAll(elements);
$(window).bind("scroll resize", scrolled);
return this;
};
}());
Animation is visible in modern browsers.

Javascript causing memory leak [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 5 years ago.
Improve this question
I can't for the life of me figure out why loading this page...
http://polyphonic.hannahkingdev.com/work/cowboys-angels or any other video page sometimes causes the browser to hang and then prompts me to stop the script that is causing the browser to slowdown.
If the video is left to run, by the time you go to close the page, the browser is pretty unresponsive. This is the same in FFox, Safari & Chrome.
Any help finding the memory leak would be most appreciated. I am completely stumped on this one.
Many thanks
var $ = jQuery.noConflict();
$(document).ready(initPage);
// -- Init -- //
function initPage() {
resizeWork();
//hoverWorkImg();
};
// -- Pageload -- //
$(document).ready(function() {
$(".animsition").animsition({
inClass: 'overlay-slide-in-left',
outClass: 'overlay-slide-out-left',
inDuration: 1500,
outDuration: 800,
linkElement: 'a:not([target="_blank"]):not([href^=#]):not([href^=mailto]:not([href^=tel])',
loading: true,
loadingParentElement: 'body', //animsition wrapper element
loadingClass: 'animsition-loading',
loadingInner: '', // e.g '<img src="loading.svg" />'
timeout: false,
timeoutCountdown: 5000,
onLoadEvent: true,
browser: [ 'animation-duration', '-webkit-animation-duration'],
overlay : true,
overlayClass : 'animsition-overlay-slide',
overlayParentElement : 'body',
transition: function(url){ window.location.href = url; }
});
});
// -- Navigation -- //
if (document.getElementById('menu-button') !=null) {
var button = document.getElementById('menu-button');
var menu = document.getElementById('menu-main-navigation');
var menuPos = window.innerHeight;
var menuFixed = false;
button.addEventListener('click', function(ev){
ev.preventDefault();
menu.classList.toggle('navigation--isOpen');
button.classList.toggle('navigation-button--isOpen');
})
updateMenuPosition();
window.addEventListener('resize', updateMenuPosition);
// -- Highlight nav -- /
var $navigationLinks = $('#menu-main-navigation > li > a');
var $sections = $($("section").get().reverse());
var sectionIdTonavigationLink = {};
$sections.each(function() {
var id = $(this).attr('id');
sectionIdTonavigationLink[id] = $('#menu-main-navigation > li > a[href="#' + id + '"]');
});
function throttle(fn, interval) {
var lastCall, timeoutId;
return function () {
var now = new Date().getTime();
if (lastCall && now < (lastCall + interval) ) {
clearTimeout(timeoutId);
timeoutId = setTimeout(function () {
lastCall = now;
fn.call();
}, interval - (now - lastCall) );
} else {
lastCall = now;
fn.call();
}
};
}
function highlightNavigation() {
var scrollPosition = $(window).scrollTop();
$sections.each(function() {
var currentSection = $(this);
var sectionTop = currentSection.offset().top;
if (scrollPosition >= sectionTop) {
var id = currentSection.attr('id');
var $navigationLink = sectionIdTonavigationLink[id];
if (!$navigationLink.hasClass('active')) {
$navigationLinks.removeClass('active');
$navigationLink.addClass('active');
}
return false;
}
});
}
$(window).scroll( throttle(highlightNavigation,100) );
}
function updateMenuPosition(){
if(menuFixed){
menu.classList.remove('navigation--white');
menuPos = menu.offsetTop;
menu.classList.add('navigation--white');
} else {
menuPos = menu.offsetTop;
}
updateMenuAttachment();
}
updateMenuAttachment();
window.addEventListener('scroll', updateMenuAttachment);
function updateMenuAttachment(){
var scrollPos = document.documentElement.scrollTop || document.body.scrollTop;
if(!menuFixed && scrollPos >= window.innerHeight - 200){
menu.classList.add('navigation--white');
menuFixed = true;
} else if(menuFixed && scrollPos < window.innerHeight - 200){
menu.classList.remove('navigation--white');
menuFixed = false;
}
}
// -- Smooth scroll to anchor -- /
$('a[href*="#"]')
.not('[href="#"]')
.not('[href="#0"]')
.click(function(event) {
if (
location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '')
&&
location.hostname == this.hostname
) {
var target = $(this.hash);
target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
if (this.hash=="#work") {;
var offsetT = (target.offset().top)-90;
} else {
var offsetT = (target.offset().top);
}
if (target.length) {
event.preventDefault();
$('html, body').animate({
scrollTop: offsetT
}, 1000, function() {
});
}
}
});
// -- Back to top -- /
jQuery(document).ready(function($){
var offset = 300,
offset_opacity = 1200,
scroll_top_duration = 700,
$back_to_top = $('.cd-top');
$(window).scroll(function(){
( $(this).scrollTop() > offset ) ? $back_to_top.addClass('cd-is-visible') : $back_to_top.removeClass('cd-is-visible cd-fade-out');
if( $(this).scrollTop() > offset_opacity ) {
$back_to_top.addClass('cd-fade-out');
}
});
$back_to_top.on('click', function(event){
event.preventDefault();
$('body,html').animate({
scrollTop: 0 ,
}, scroll_top_duration
);
});
});
// -- Animate -- /
new WOW().init();
// -- Inline all SVGs -- /
jQuery('img.svg').each(function(){
var $img = jQuery(this);
var imgID = $img.attr('id');
var imgClass = $img.attr('class');
var imgURL = $img.attr('src');
jQuery.get(imgURL, function(data) {
// Get the SVG tag, ignore the rest
var $svg = jQuery(data).find('svg');
// Add replaced image's ID to the new SVG
if(typeof imgID !== 'undefined') {
$svg = $svg.attr('id', imgID);
}
// Add replaced image's classes to the new SVG
if(typeof imgClass !== 'undefined') {
$svg = $svg.attr('class', imgClass+' replaced-svg');
}
// Remove any invalid XML tags as per http://validator.w3.org
$svg = $svg.removeAttr('xmlns:a');
// Check if the viewport is set, if the viewport is not set the SVG wont't scale.
if(!$svg.attr('viewBox') && $svg.attr('height') && $svg.attr('width')) {
$svg.attr('viewBox', '0 0 ' + $svg.attr('height') + ' ' + $svg.attr('width'))
}
// Replace image with new SVG
$img.replaceWith($svg);
}, 'xml');
});
// -- work grid -- /
function resizeWork() {
var div = $('.work article');
div.css('height', div.width() / 1.9);
}
function hoverWorkImg() {
$('article a').on('mouseenter', function () {
$(this).find('.imagehover:hidden').fadeIn(700);
$(this).find('.second:hidden').fadeIn(700);
$(this).find('.first:visible').fadeOut(700);
})
$('article a').on('mouseleave', function () {
$(this).find('.imagehover:visible').fadeOut(700);
$(this).find('.second:visible').fadeOut(700);
$(this).find('.first:hidden').fadeIn(700);
})
}
// -- Video Page -- /
function playVideoInPage() {
showModal(false);
initPlayer();
startPlay();
}
var $video,
$playPauseButton,
$muteButton,
$seekBar,
isMouseMove=false,
$timing;
function showModal(html) {
if (html !== false) {
$('.work-video').html(html).fadeIn();
}
else {
$('.work-video').fadeIn();
}
hidePlayerControls();
}
function initPlayer() {
$('#video').css('height', $(window).height());
$video = $('.video-container'),
$playPauseButton = $('#play-pause'),
$muteButton = $('#mute'),
$seekBar = $('#seek-bar'),
$timing = $('.timing');
/*setTimeout('showPlayerControls()', 1500);*/
$playPauseButton.on('click', function () {
if ($video.get()[0].paused == true) {
$video.get()[0].play();
$playPauseButton.removeClass('paused');
}
else {
$video.get()[0].pause();
$playPauseButton.addClass('paused');
$timing.stop(true, true);
}
})
$muteButton.on('click', function () {
if ($video.get()[0].muted == false) {
$video.get()[0].muted = true;
$muteButton.addClass('muted');
}
else {
$video.get()[0].muted = false;
$muteButton.removeClass('muted');
}
})
$seekBar.on("click", function (e) {
var x = e.pageX - $(this).offset().left,
widthForOnePercent = $seekBar.width() / 100,
progress = x / widthForOnePercent,
goToTime = progress * ($video.get()[0].duration / 100);
goToPercent(progress)
$video.get()[0].currentTime = goToTime;
});
$video.get()[0].addEventListener("timeupdate", function () {
var value = (100 / $video.get()[0].duration) * $video.get()[0].currentTime;
goToPercent(value)
});
}
function startPlay() {
$playPauseButton.click();
}
function goToPercent(value) {
$timing.css('width', value + '%');
}
function showPlayerControls() {
$('.controls').fadeIn();
isMouseMove=true;
}
function hidePlayerControls() {
$('.controls').fadeOut();
}
function hidePlayerControls() {
setInterval(function() {
if (!isMouseMove) {
hidePlayerControls();
}
isMouseMove=false;
}, 4000);
$(document).mousemove(function (event) {
isMouseMove=true;
showPlayerControls();
});
}

The most likely cause is this code here:
function hidePlayerControls() {
setInterval(function() {
if (!isMouseMove) {
hidePlayerControls();
}
isMouseMove=false;
}, 4000);
so every 4 seconds you start a new interval (interval = repeat until cancelled).
In the first case, you might like to change this to setTimeout
function hidePlayerControls() {
setTimeout(function() {
if (!isMouseMove) {
hidePlayerControls();
}
isMouseMove=false;
}, 4000);
In the second, you could change this to cancel the previous timeout when the mouse moves - this is termed debouncing - though usually with a shorter interval, the principle is the same.
As a general debugging tip, liberally add console.log statements and watch your browser console (there are other ways, this is a basic debugging first-step), eg:
function hidePlayerControls() {
console.log("hidePlayerControls() called");
setInterval(function() {
console.log("hidePlayerControls - interval triggered", isMouseMove);
if (!isMouseMove) {
hidePlayerControls();
}
isMouseMove=false;
}, 4000);
to see just how many times this gets called