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jquery.smoove.js
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jquery.smoove.js
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/*!
* jQuery Smoove v0.2.11 (http://smoove.js.org/)
* Copyright (c) 2017 Adam Bouqdib
* Licensed under GPL-2.0 (http://abemedia.co.uk/license)
*/
(function($, window, document) {
// function for adding vendor prefixes
function crossBrowser(property, value, prefix) {
function ucase(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
}
var vendor = ['webkit', 'moz', 'ms', 'o'],
properties = {};
for (var i = 0; i < vendor.length; i++) {
if (prefix) {
value = value.replace(prefix, '-' + vendor[i] + '-' + prefix);
}
properties[ucase(vendor[i]) + ucase(property)] = value;
}
properties[property] = value;
return properties;
}
function smooveIt(direction) {
var height = $(window).height(),
width = $(window).width();
for (var i = 0; i < $.fn.smoove.items.length; i++) {
var $item = $.fn.smoove.items[i],
params = $item.params;
// disable smoove on small screens
if (params.min_width > width || params.min_height > height) {
return false;
}
// if direction isn't set, set offset to 0 to avoid hiding objects that are above the fold
var offset = (!direction || direction === 'down' && $item.css('opacity') === '1') ? 0 : params.offset,
itemtop = $(window).scrollTop() + height - $item.data('top');
// offset in %
if (typeof offset === 'string' && offset.indexOf('%')) {
offset = parseInt(offset) / 100 * height;
}
if (itemtop < offset) {
if (params.opacity !== false) {
$item.css({
opacity: params.opacity
});
}
var transforms = [],
properties = ['move', 'move3D', 'moveX', 'moveY', 'moveZ', 'rotate', 'rotate3d', 'rotateX', 'rotateY', 'rotateZ', 'scale', 'scale3d', 'scaleX', 'scaleY', 'skew', 'skewX', 'skewY'];
for (var p = 0; p < properties.length; p++) {
if (typeof params[properties[p]] !== "undefined") {
transforms[properties[p]] = params[properties[p]];
}
}
var transform = '';
for (var t in transforms) {
transform += t.replace('move', 'translate') + '(' + transforms[t] + ') ';
}
if (transform) {
$item.css(crossBrowser('transform', transform));
$item.parent().css(crossBrowser('perspective', params.perspective));
//$item.parent().css(crossBrowser('transformStyle', params.transformstyle));
if (params.transformOrigin) {
$item.css(crossBrowser('transformOrigin', params.transformOrigin));
}
}
} else {
$item.css('opacity', 1).css(crossBrowser('transform', ''));
}
}
}
function throttle(fn, threshhold, scope) {
threshhold = threshhold || 250;
var last, deferTimer;
return function() {
var context = scope || this,
now = +new Date(),
args = arguments;
if (last && now < last + threshhold) {
// hold on to it
clearTimeout(deferTimer);
deferTimer = setTimeout(function() {
last = now;
fn.apply(context, args);
}, threshhold);
} else {
last = now;
fn.apply(context, args);
}
};
}
$.fn.smoove = function(options) {
$.fn.smoove.init(this, $.extend({}, $.fn.smoove.defaults, options));
return this;
};
$.fn.smoove.items = [];
$.fn.smoove.loaded = false;
$.fn.smoove.defaults = {
offset: 150,
opacity: 0,
transition: "all 1s ease, opacity 1.5s ease",
transformStyle: 'preserve-3d',
transformOrigin: false,
perspective: 1000,
min_width: 768,
min_height: false
};
$.fn.smoove.init = function(items, settings) {
items.each(function() {
var $item = $(this),
params = $item.params = $.extend({}, settings, $item.data());
$item.params.opacity = $item.params.opacity / 100;
$item.data('top', $item.offset().top);
params.transition = crossBrowser('transition', params.transition, 'transform');
$item.css(params.transition);
$.fn.smoove.items.push($item);
});
// add event handlers
if (!$.fn.smoove.loaded) {
$.fn.smoove.loaded = true;
var oldScroll = 0,
oldHeight = $(window).height(),
oldWidth = $(window).width(),
oldDocHeight = $(document).height(),
resizing;
// naughty way of avoiding vertical scrollbars when items slide in/out from the side
if ($('body').width() === $(window).width()) {
$('body').css('overflow-x', 'hidden');
}
$(window).on("orientationchange resize", function() {
clearTimeout(resizing);
resizing = setTimeout(function() {
var height = $(window).height(),
width = $(window).width(),
direction = (oldHeight > height) ? direction = 'up' : 'down',
items = $.fn.smoove.items;
oldHeight = height;
// responsive support - reassign position values on resize
if (oldWidth !== width) {
for (var i = 0; i < items.length; i++) {
items[i].css(crossBrowser('transform', '')).css(crossBrowser('transition', ''));
}
// wait for responsive magic to finish
var stillResizing = setInterval(function() {
var docHeight = $(document).height();
if (docHeight === oldDocHeight) {
window.clearInterval(stillResizing);
for (var i = 0; i < items.length; i++) {
items[i].data('top', items[i].offset().top);
items[i].css(items[i].params.transition);
}
smooveIt(direction);
}
oldDocHeight = docHeight;
}, 500);
} else {
smooveIt(direction);
}
oldWidth = width;
}, 500);
});
$(window).on('load', function() {
smooveIt();
// throttle scroll handler
$(window).on('scroll', throttle(function() {
var scrolltop = $(window).scrollTop(),
direction = (scrolltop < oldScroll) ? direction = 'up' : 'down';
oldScroll = scrolltop;
smooveIt(direction);
}, 250));
});
}
};
}(jQuery, window, document));