Skip to content
This repository has been archived by the owner on Sep 11, 2022. It is now read-only.

Support for dynamic content #141

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Support for dynamic content #141

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
357 changes: 205 additions & 152 deletions jquery.sticky.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,162 +11,215 @@
// might need to adjust the width in some cases.

(function($) {
var defaults = {
topSpacing: 0,
bottomSpacing: 0,
className: 'is-sticky',
wrapperClassName: 'sticky-wrapper',
center: false,
getWidthFrom: '',
responsiveWidth: false
},
$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; i < sticked.length; i++) {
var s = sticked[i],
elementTop = s.stickyWrapper.offset().top,
etse = elementTop - s.topSpacing - extra;

if (scrollTop <= etse) {
if (s.currentTop !== null) {
s.stickyElement
.css('width', '')
.css('position', '')
.css('top', '');
s.stickyElement.trigger('sticky-end', [s]).parent().removeClass(s.className);
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) {
s.stickyElement
.css('width', s.stickyElement.width())
.css('position', 'fixed')
.css('top', newTop);

if (typeof s.getWidthFrom !== 'undefined') {
s.stickyElement.css('width', $(s.getWidthFrom).width());
var defaults = {
topSpacing: 0,
bottomSpacing: 0,
className: 'is-sticky',
wrapperClassName: 'sticky-wrapper',
center: false,
getWidthFrom: '',
responsiveWidth: false
},
$window = $(window),
$document = $(document),
sticked = [],
windowHeight = $window.height(),
update = function() {
updateSize();
scroller();
},
updateSize = function(sticky) {
var _sticked;
if(sticky) {
if(Object.prototype.toString.call(sticky) == '[object Array]')
{
_sticked = sticky;
} else {
_sticked = [sticky];
}
} else {
_sticked = sticked;
}

s.stickyElement.trigger('sticky-start', [s]).parent().addClass(s.className);
s.currentTop = newTop;
}
}
}
},
resizer = function() {
windowHeight = $window.height();

for (var i = 0; i < sticked.length; i++) {
var s = sticked[i];
if (typeof s.getWidthFrom !== 'undefined' && s.responsiveWidth === true) {
s.stickyElement.css('width', $(s.getWidthFrom).width());
}
}
},
methods = {
init: function(options) {
var o = $.extend({}, defaults, options);
return this.each(function() {
var stickyElement = $(this);

var stickyId = stickyElement.attr('id');
var wrapperId = stickyId ? stickyId + '-' + defaults.wrapperClassName : defaults.wrapperClassName
var wrapper = $('<div></div>')
.attr('id', stickyId + '-sticky-wrapper')
.addClass(o.wrapperClassName);
stickyElement.wrapAll(wrapper);

if (o.center) {
stickyElement.parent().css({width:stickyElement.outerWidth(),marginLeft:"auto",marginRight:"auto"});
}

if (stickyElement.css("float") == "right") {
stickyElement.css({"float":"none"}).parent().css({"float":"right"});
}

var stickyWrapper = stickyElement.parent();
stickyWrapper.css('height', stickyElement.outerHeight());
sticked.push({
topSpacing: o.topSpacing,
bottomSpacing: o.bottomSpacing,
stickyElement: stickyElement,
currentTop: null,
stickyWrapper: stickyWrapper,
className: o.className,
getWidthFrom: o.getWidthFrom,
responsiveWidth: o.responsiveWidth
});
});
},
update: scroller,
unstick: function(options) {
return this.each(function() {
var unstickyElement = $(this);

var removeIdx = -1;
for (var i = 0; i < sticked.length; i++)
{
if (sticked[i].stickyElement.get(0) == unstickyElement.get(0))
{
removeIdx = i;
for (var i = 0; i < _sticked.length; i++) {
var s = _sticked[i];
if(s.isSticky) {
s.stickyWrapper.css('height', s.stickyElement.outerHeight());
} else {
s.stickyWrapper.css('height', '');
}
}
}
if(removeIdx != -1)
{
sticked.splice(removeIdx,1);
unstickyElement.unwrap();
unstickyElement.removeAttr('style');
}
});
}
};
},
scroller = function() {
var scrollTop = $window.scrollTop(),
documentHeight = $document.height(),
dwh = documentHeight - windowHeight,
scrollBottom = dwh-scrollTop,
extra = (scrollTop > dwh) ? dwh - scrollTop : 0;

// 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, Array.prototype.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, Array.prototype.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');
for (var i = 0; i < sticked.length; i++) {
var s = sticked[i],
elementTop = s.stickyWrapper.offset().top,
etse = elementTop - s.topSpacing - extra;

if (scrollTop <= etse) {
if (s.currentTop !== null) {
s.isSticky = s.isStickyTop = s.isStickyBottom = false;
s.stickyElement
.css('position', '')
.css('top', '');

s.stickyWrapper.css('height','');

updateSize(s);

s.currentTop = null;
}
}
else {
var newTop,
newBottom = s.bottomSpacing - scrollBottom,
tempTop = documentHeight - s.stickyElement.outerHeight()
- s.topSpacing - s.bottomSpacing - scrollTop - extra;

if (tempTop < 0) {
newTop = tempTop + s.topSpacing;
} else {
newTop = s.topSpacing;
}

if (s.currentTop != newTop) {
if(tempTop < 0) {
s.isSticky = s.isStickyBottom = true;
s.isStickyTop = false;
s.stickyElement
.css('position', 'fixed')
.css('top', '')
.css('bottom', newBottom);
} else {
s.isSticky = s.isStickyTop = true;
s.isStickyBottom = false;
s.stickyElement
.css('position', 'fixed')
.css('bottom', '')
.css('top', newTop);
}

updateSize(s);

if (typeof s.getWidthFrom !== 'undefined') {
s.stickyElement.css('width', $(s.getWidthFrom).width());
}

s.stickyElement.trigger('sticky-start', [s]).parent().addClass(s.className);
s.currentTop = newTop;
s.currentBottom = newBottom;
}
}
}
},
resizer = function() {
windowHeight = $window.height();

for (var i = 0; i < sticked.length; i++) {
var s = sticked[i];
if (typeof s.getWidthFrom !== 'undefined' && s.responsiveWidth === true) {
s.stickyElement.css('width', $(s.getWidthFrom).width());
}
}
},
methods = {
init: function(options) {
var o = $.extend({}, defaults, options);
return this.each(function() {
var stickyElement = $(this);

var stickyId = stickyElement.attr('id');
var wrapperId = stickyId ? stickyId + '-' + defaults.wrapperClassName : defaults.wrapperClassName
var wrapper = $('<div></div>')
.attr('id', stickyId + '-sticky-wrapper')
.addClass(o.wrapperClassName);
stickyElement.wrapAll(wrapper);

if (o.center) {
stickyElement.parent().css({width:stickyElement.outerWidth(),marginLeft:"auto",marginRight:"auto"});
}

if (stickyElement.css("float") == "right") {
stickyElement.css({"float":"none"}).parent().css({"float":"right"});
}

var stickyWrapper = stickyElement.parent();
stickyWrapper.css('height', stickyElement.outerHeight());
sticked.push({
topSpacing: o.topSpacing,
bottomSpacing: o.bottomSpacing,
stickyElement: stickyElement,
currentTop: null,
currentBottom: null,
stickyWrapper: stickyWrapper,
className: o.className,
getWidthFrom: o.getWidthFrom,
responsiveWidth: o.responsiveWidth,
isSticky: false,
isStickyTop: false,
isStickyBottom: false
});
});
},
update: update,
unstick: function(options) {
return this.each(function() {
var unstickyElement = $(this);

var removeIdx = -1;
for (var i = 0; i < sticked.length; i++)
{
if (sticked[i].stickyElement.get(0) == unstickyElement.get(0))
{
removeIdx = i;
}
}
if(removeIdx != -1)
{
sticked.splice(removeIdx,1);
unstickyElement.unwrap();
unstickyElement.removeAttr('style');
}
});
}
};

// 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);
}

};
$(function() {
setTimeout(scroller, 0);
});
$.fn.sticky = function(method) {
if (methods[method]) {
return methods[method].apply(this, Array.prototype.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, Array.prototype.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);
});
})(jQuery);