289 lines
9.8 KiB
JavaScript
289 lines
9.8 KiB
JavaScript
|
// Sticky Plugin v1.0.4 for jQuery
|
||
|
|
// =============
|
||
|
|
// Author: Anthony Garand
|
||
|
|
// Improvements by German M. Bravo (Kronuz) and Ruud Kamphuis (ruudk)
|
||
|
|
// Improvements by Leonardo C. Daronco (daronco)
|
||
|
|
// Created: 02/14/2011
|
||
|
|
// Date: 07/20/2015
|
||
|
|
// Website: http://stickyjs.com/
|
||
|
|
// Description: Makes an element on the page stick on the screen as you scroll
|
||
|
|
// It will only set the 'top' and 'position' of your element, you
|
||
|
|
// might need to adjust the width in some cases.
|
||
|
|
|
||
|
|
(function (factory) {
|
||
|
|
if (typeof define === 'function' && define.amd) {
|
||
|
|
// AMD. Register as an anonymous module.
|
||
|
|
define(['jquery'], factory);
|
||
|
|
} else if (typeof module === 'object' && module.exports) {
|
||
|
|
// Node/CommonJS
|
||
|
|
module.exports = factory(require('jquery'));
|
||
|
|
} else {
|
||
|
|
// Browser globals
|
||
|
|
factory(jQuery);
|
||
|
|
}
|
||
|
|
}(function ($) {
|
||
|
|
var slice = Array.prototype.slice; // save ref to original slice()
|
||
|
|
var splice = Array.prototype.splice; // save ref to original slice()
|
||
|
|
|
||
|
|
var defaults = {
|
||
|
|
topSpacing: 0,
|
||
|
|
bottomSpacing: 0,
|
||
|
|
className: 'is-sticky',
|
||
|
|
wrapperClassName: 'sticky-wrapper',
|
||
|
|
center: false,
|
||
|
|
getWidthFrom: '',
|
||
|
|
widthFromWrapper: true, // works only when .getWidthFrom is empty
|
||
|
|
responsiveWidth: false,
|
||
|
|
zIndex: 'inherit'
|
||
|
|
},
|
||
|
|
$window = $(window),
|
||
|
|
$document = $(document),
|
||
|
|
sticked = [],
|
||
|
|
windowHeight = $window.height(),
|
||
|
|
scroller = function() {
|
||
|
|
var scrollTop = $window.scrollTop(),
|
||
|
|
documentHeight = $document.height(),
|
||
|
|
dwh = documentHeight - windowHeight,
|
||
|
|
extra = (scrollTop > dwh) ? dwh - scrollTop : 0;
|
||
|
|
|
||
|
|
for (var i = 0, l = sticked.length; i < l; i++) {
|
||
|
|
var s = sticked[i],
|
||
|
|
elementTop = s.stickyWrapper.offset().top,
|
||
|
|
etse = elementTop - s.topSpacing - extra;
|
||
|
|
|
||
|
|
//update height in case of dynamic content
|
||
|
|
s.stickyWrapper.css('height', s.stickyElement.outerHeight());
|
||
|
|
|
||
|
|
if (scrollTop <= etse) {
|
||
|
|
if (s.currentTop !== null) {
|
||
|
|
s.stickyElement
|
||
|
|
.css({
|
||
|
|
'width': '',
|
||
|
|
'position': '',
|
||
|
|
'top': '',
|
||
|
|
'z-index': ''
|
||
|
|
});
|
||
|
|
s.stickyElement.parent().removeClass(s.className);
|
||
|
|
s.stickyElement.trigger('sticky-end', [s]);
|
||
|
|
s.currentTop = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
var newTop = documentHeight - s.stickyElement.outerHeight()
|
||
|
|
- s.topSpacing - s.bottomSpacing - scrollTop - extra;
|
||
|
|
if (newTop < 0) {
|
||
|
|
newTop = newTop + s.topSpacing;
|
||
|
|
} else {
|
||
|
|
newTop = s.topSpacing;
|
||
|
|
}
|
||
|
|
if (s.currentTop !== newTop) {
|
||
|
|
var newWidth;
|
||
|
|
if (s.getWidthFrom) {
|
||
|
|
padding = s.stickyElement.innerWidth() - s.stickyElement.width();
|
||
|
|
newWidth = $(s.getWidthFrom).width() - padding || null;
|
||
|
|
} else if (s.widthFromWrapper) {
|
||
|
|
newWidth = s.stickyWrapper.width();
|
||
|
|
}
|
||
|
|
if (newWidth == null) {
|
||
|
|
newWidth = s.stickyElement.width();
|
||
|
|
}
|
||
|
|
s.stickyElement
|
||
|
|
.css('width', newWidth)
|
||
|
|
.css('position', 'fixed')
|
||
|
|
.css('top', newTop)
|
||
|
|
.css('z-index', s.zIndex);
|
||
|
|
|
||
|
|
s.stickyElement.parent().addClass(s.className);
|
||
|
|
|
||
|
|
if (s.currentTop === null) {
|
||
|
|
s.stickyElement.trigger('sticky-start', [s]);
|
||
|
|
} else {
|
||
|
|
// sticky is started but it have to be repositioned
|
||
|
|
s.stickyElement.trigger('sticky-update', [s]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s.currentTop === s.topSpacing && s.currentTop > newTop || s.currentTop === null && newTop < s.topSpacing) {
|
||
|
|
// just reached bottom || just started to stick but bottom is already reached
|
||
|
|
s.stickyElement.trigger('sticky-bottom-reached', [s]);
|
||
|
|
} else if(s.currentTop !== null && newTop === s.topSpacing && s.currentTop < newTop) {
|
||
|
|
// sticky is started && sticked at topSpacing && overflowing from top just finished
|
||
|
|
s.stickyElement.trigger('sticky-bottom-unreached', [s]);
|
||
|
|
}
|
||
|
|
|
||
|
|
s.currentTop = newTop;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check if sticky has reached end of container and stop sticking
|
||
|
|
var stickyWrapperContainer = s.stickyWrapper.parent();
|
||
|
|
var unstick = (s.stickyElement.offset().top + s.stickyElement.outerHeight() >= stickyWrapperContainer.offset().top + stickyWrapperContainer.outerHeight()) && (s.stickyElement.offset().top <= s.topSpacing);
|
||
|
|
|
||
|
|
if( unstick ) {
|
||
|
|
s.stickyElement
|
||
|
|
.css('position', 'absolute')
|
||
|
|
.css('top', '')
|
||
|
|
.css('bottom', 0)
|
||
|
|
.css('z-index', '');
|
||
|
|
} else {
|
||
|
|
s.stickyElement
|
||
|
|
.css('position', 'fixed')
|
||
|
|
.css('top', newTop)
|
||
|
|
.css('bottom', '')
|
||
|
|
.css('z-index', s.zIndex);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
resizer = function() {
|
||
|
|
windowHeight = $window.height();
|
||
|
|
|
||
|
|
for (var i = 0, l = sticked.length; i < l; i++) {
|
||
|
|
var s = sticked[i];
|
||
|
|
var newWidth = null;
|
||
|
|
if (s.getWidthFrom) {
|
||
|
|
if (s.responsiveWidth) {
|
||
|
|
newWidth = $(s.getWidthFrom).width();
|
||
|
|
}
|
||
|
|
} else if(s.widthFromWrapper) {
|
||
|
|
newWidth = s.stickyWrapper.width();
|
||
|
|
}
|
||
|
|
if (newWidth != null) {
|
||
|
|
s.stickyElement.css('width', newWidth);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
methods = {
|
||
|
|
init: function(options) {
|
||
|
|
return this.each(function() {
|
||
|
|
var o = $.extend({}, defaults, options);
|
||
|
|
var stickyElement = $(this);
|
||
|
|
|
||
|
|
var stickyId = stickyElement.attr('id');
|
||
|
|
var wrapperId = stickyId ? stickyId + '-' + defaults.wrapperClassName : defaults.wrapperClassName;
|
||
|
|
var wrapper = $('<div></div>')
|
||
|
|
.attr('id', wrapperId)
|
||
|
|
.addClass(o.wrapperClassName);
|
||
|
|
|
||
|
|
stickyElement.wrapAll(function() {
|
||
|
|
if ($(this).parent("#" + wrapperId).length == 0) {
|
||
|
|
return wrapper;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var stickyWrapper = stickyElement.parent();
|
||
|
|
|
||
|
|
if (o.center) {
|
||
|
|
stickyWrapper.css({width:stickyElement.outerWidth(),marginLeft:"auto",marginRight:"auto"});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (stickyElement.css("float") === "right") {
|
||
|
|
stickyElement.css({"float":"none"}).parent().css({"float":"right"});
|
||
|
|
}
|
||
|
|
|
||
|
|
o.stickyElement = stickyElement;
|
||
|
|
o.stickyWrapper = stickyWrapper;
|
||
|
|
o.currentTop = null;
|
||
|
|
|
||
|
|
sticked.push(o);
|
||
|
|
|
||
|
|
methods.setWrapperHeight(this);
|
||
|
|
methods.setupChangeListeners(this);
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
setWrapperHeight: function(stickyElement) {
|
||
|
|
var element = $(stickyElement);
|
||
|
|
var stickyWrapper = element.parent();
|
||
|
|
if (stickyWrapper) {
|
||
|
|
stickyWrapper.css('height', element.outerHeight());
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
setupChangeListeners: function(stickyElement) {
|
||
|
|
if (window.MutationObserver) {
|
||
|
|
var mutationObserver = new window.MutationObserver(function(mutations) {
|
||
|
|
if (mutations[0].addedNodes.length || mutations[0].removedNodes.length) {
|
||
|
|
methods.setWrapperHeight(stickyElement);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
mutationObserver.observe(stickyElement, {subtree: true, childList: true});
|
||
|
|
} else {
|
||
|
|
if (window.addEventListener) {
|
||
|
|
stickyElement.addEventListener('DOMNodeInserted', function() {
|
||
|
|
methods.setWrapperHeight(stickyElement);
|
||
|
|
}, false);
|
||
|
|
stickyElement.addEventListener('DOMNodeRemoved', function() {
|
||
|
|
methods.setWrapperHeight(stickyElement);
|
||
|
|
}, false);
|
||
|
|
} else if (window.attachEvent) {
|
||
|
|
stickyElement.attachEvent('onDOMNodeInserted', function() {
|
||
|
|
methods.setWrapperHeight(stickyElement);
|
||
|
|
});
|
||
|
|
stickyElement.attachEvent('onDOMNodeRemoved', function() {
|
||
|
|
methods.setWrapperHeight(stickyElement);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
update: scroller,
|
||
|
|
unstick: function(options) {
|
||
|
|
return this.each(function() {
|
||
|
|
var that = this;
|
||
|
|
var unstickyElement = $(that);
|
||
|
|
|
||
|
|
var removeIdx = -1;
|
||
|
|
var i = sticked.length;
|
||
|
|
while (i-- > 0) {
|
||
|
|
if (sticked[i].stickyElement.get(0) === that) {
|
||
|
|
splice.call(sticked,i,1);
|
||
|
|
removeIdx = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if(removeIdx !== -1) {
|
||
|
|
unstickyElement.unwrap();
|
||
|
|
unstickyElement
|
||
|
|
.css({
|
||
|
|
'width': '',
|
||
|
|
'position': '',
|
||
|
|
'top': '',
|
||
|
|
'float': '',
|
||
|
|
'z-index': ''
|
||
|
|
})
|
||
|
|
;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// should be more efficient than using $window.scroll(scroller) and $window.resize(resizer):
|
||
|
|
if (window.addEventListener) {
|
||
|
|
window.addEventListener('scroll', scroller, false);
|
||
|
|
window.addEventListener('resize', resizer, false);
|
||
|
|
} else if (window.attachEvent) {
|
||
|
|
window.attachEvent('onscroll', scroller);
|
||
|
|
window.attachEvent('onresize', resizer);
|
||
|
|
}
|
||
|
|
|
||
|
|
$.fn.sticky = function(method) {
|
||
|
|
if (methods[method]) {
|
||
|
|
return methods[method].apply(this, slice.call(arguments, 1));
|
||
|
|
} else if (typeof method === 'object' || !method ) {
|
||
|
|
return methods.init.apply( this, arguments );
|
||
|
|
} else {
|
||
|
|
$.error('Method ' + method + ' does not exist on jQuery.sticky');
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
$.fn.unstick = function(method) {
|
||
|
|
if (methods[method]) {
|
||
|
|
return methods[method].apply(this, slice.call(arguments, 1));
|
||
|
|
} else if (typeof method === 'object' || !method ) {
|
||
|
|
return methods.unstick.apply( this, arguments );
|
||
|
|
} else {
|
||
|
|
$.error('Method ' + method + ' does not exist on jQuery.sticky');
|
||
|
|
}
|
||
|
|
};
|
||
|
|
$(function() {
|
||
|
|
setTimeout(scroller, 0);
|
||
|
|
});
|
||
|
|
}));
|