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making multiple sliders with one set of jQuery code

I've made a slider with jQuery using html tags which have classes instead of IDs so that I will be able to use the same jQuery code for other duplicated sliders.
The problem is, I want the width of my ul to be calculated based on the number of lis, instead of setting it manually in CSS. When there is only one slider I can set my vars outside of the function, but when I have to use it though event attributes on my html parts so that I will be able to use them for multiple sliders, I have to move the vars inside of my function, which sets the wrong width.
This is my code:
function OLAR(direction,span) {
var OurNexNPrv = $(span);
var Parent_OLAR = OurNexNPrv.parents('.OLAR');
var UL_OF_OLAR = Parent_OLAR.find('.OLAR_CONTENT ul');
var LI_OF_OLAR = UL_OF_OLAR.find('li');
var LI_OF_OLAR_LENGTH = LI_OF_OLAR.length;
var Quantity_OF_OLAR_PAGES = LI_OF_OLAR_LENGTH / 3;
var Max_Margin_LEFT = -(Quantity_OF_OLAR_PAGES - 1) * 576;
UL_OF_OLAR.css('width',LI_OF_OLAR_LENGTH*192);
var AffectedLeftMargin;
var CurrentLeftMargin = UL_OF_OLAR.css('margin-left');
CurrentLeftMargin = parseFloat(CurrentLeftMargin);
if (direction == 'right') {
AffectedLeftMargin = CurrentLeftMargin - 576;
}
if (direction == 'left') {
AffectedLeftMargin = CurrentLeftMargin + 576;
}
if (AffectedLeftMargin < Max_Margin_LEFT) {
AffectedLeftMargin = 0;
}
if (AffectedLeftMargin > 0) {
AffectedLeftMargin = Max_Margin_LEFT;
}
UL_OF_OLAR.animate({'marginLeft': AffectedLeftMargin}, 1000);
}
$('.CIRCLE_LOAD_RIGHT').click(function () {
OLAR('right');
});
$('.CIRCLE_LOAD_LEFT').click(function () {
OLAR('left');
});
How can I set the width for each of my uls individually, through css commands outside of that function?

Okay, my ul tag did not have the absolute position; after giving it the right position and left:0 and bottom:0 or right:0 and bottom:0 (based on your language)the given width which comes from JQuery code can rhyme perfectly with everything else. I've tried it with multiple sliders and it works perfectly :)
So, we need an anchor point in order to make this work. And there is nothing wrong with this JQuery code which has been mentioned above!
Have a great day.

Two columned layout with multiple different height widgets, how to make widgets collapsable and keep flow of the page?

I have a main page that I'm working on and that is 2 columns with equal widths, with multiple widgets on the page. The page is responsive and the number of widgets is variable. At the moment I have a solution which works quite well and doesn't use a plugin like masonry or salvattore. The reason I've gone against using these plugins is that I don't want the page to be two rigid columns, I'd like the widgets to be able to flow and fit the available space.
This brings me onto my question - I'd like to be able to collapse any of these widgets and the other widgets should flow around and fit the space left. This is a prototype of what I have so far:
http://codepen.io/charge-valtech/pen/bzJfj
This is the jquery I've written:
function layoutWidgets() {
console.log('layout widgets');
if ($(".left-widget").css("float") == "left") {
$('.left-widget').each(function (index, value) {
var widgetPosition = $(this).position().left;
if (widgetPosition >= 30) {
$(this).removeClass('left-widget').addClass('right-widget');
}
});
$('.right-widget').each(function (index, value) {
var widgetPosition = $(this).position().left;
if (widgetPosition <= 30) {
$(this).removeClass('right-widget').addClass('left-widget');
}
});
}
}
layoutWidgets();
$(window).resize(layoutWidgets);
$('.collapse').click(function () {
$(this).closest('.widget').toggleClass('collapsed');
});
But for some reason if I put the layoutWidgets function inside the click function for collapsing the widgets, it doesn't work.
Any ideas?

Either put your code in a document.ready function or include it in the footer after everything is loaded. You can't attach a click event to an element that doesn't exist yet.

The way I've solved this is to do a for loop in my click function which should iterate through the widgets and run layoutWidgets:
$('.collapse-expand').click(function () {
$(this).closest('.dashboard-panel').toggleClass('collapsed');
var n = 7;
for (var i = 0; i < n; i++) {
layoutWidgets();
}
});

jQuery event listener for fully loaded DOM with dynamic content

I'm trying to use jQuery script to align height of two divs. Everything works fine until I have some dynamic content in one of divs.
When I hardcode some static content in one of divs like:
<br>asd<br>asd<br> x 20
both divs has the same height property, but when I load some data from DB to one of divs, they are different.
I guess that the problem is in .ready() listener. Documentation says that it fires when DOM is fully loaded but it looks like it's not the truth.
My question is: what kind of listener or other 'trick' should I use? I think that jquery/javascript solution is cleaner than messing with css and I would like to have this kind of solution.
Thanks in advance.
jquery script:
$(document).ready(function(){
var difference = $("#layout-navigation-wrapper").height() - $("#layout-content-wrapper").height();
if(difference<0)
{
var height = $("#layout-content-wrapper").height() -1;
$("#layout-navigation-wrapper").height(height);
}
else if(difference >= 0)
{
var height = $("#layout-navigation-wrapper").height() -2;
$("#layout-content-wrapper").height(height);
}
});

jquery in the base work with event document.ready is means when all DOM is ready until here make the jquery code. is for don't have a option to render jquery code without render jquery library
if you want to add event just when all the dom is loaded include content and images you need to do this
$(document).ready(function(){
$(window).load(function(){
var difference = $("#layout-navigation-wrapper").height() - $("#layout-content-wrapper").height();
if(difference<0)
{
var height = $("#layout-content-wrapper").height() -1;
$("#layout-navigation-wrapper").height(height);
}
else if(difference >= 0)
{
var height = $("#layout-navigation-wrapper").height() -2;
$("#layout-content-wrapper").height(height);
}
});
});

You can use window.onload to execute a script once a web page has completely loaded all content including images, script files, CSS files, etc.
window.onload = function() {
var difference = $("#layout-navigation-wrapper").height() - $("#layout-content-wrapper").height();
if(difference<0)
{
var height = $("#layout-content-wrapper").height() -1;
$("#layout-navigation-wrapper").height(height);
}
else if(difference >= 0)
{
var height = $("#layout-navigation-wrapper").height() -2;
$("#layout-content-wrapper").height(height);
}
};

how to make a <div> appear in slow motion

I want the javascript code to show a div in slow motion.
function showDiv(divID)
{
if(document.getElementById(divID).style.display=='none')
{
document.getElementById(divID).style.display='block';
}
}
Here div appears, but not in slow motion. Can anyone help ??
Thanks in advance
Dev..

There is no need of jQuery in this atall , its just a basic I am using your function to explain how thats done.
function showDiv(divID)
{
if(document.getElementById(divID).style.display=='none')
{
document.getElementById(divID).style.display='block';
}
}
What your function is doing is basically removing the whole Element from BOX Model ( the toggle of block and none removes the element totally from the BOX Model so it doesnt occupies any space or anything , this but may / may not cause some layout issues );
Now to animate it in slow motion you need a timing function.
a timing function is a simple mathematical function which gives the value of the property ( opacity in your case ) for a given time or depending on other parameters .
Other then that you also need to use properties like opacity in order to fade it (Opacity is a CSS property that defines the transparency of an element and its childrens )
So let us begin with a very basic show / hide using setTimeout Function in JS.
function getValue(t,dir){
if( dir > 0){
return 0.5*t; /* Y = mx + c */
}else{
return 1-(0.5*t);
}
/*
Here the slope of line m = 0.5.
t is the time interval.
*/
}
function animator(divID){
if(!(this instanceof animator)) return new animator(divID); /* Ignore this */
var Node = document.getElementById(divID),
start = new Date.getTime(), // The initiation.
now = 0,
dir = 1,
visible = true;
function step( ){
now = new Date.getTime();
var val = getValue( now - start,dir)
Node.style.opacity = val;
if( dir > 0 && val > 1 || dir < 0 && val < 0 ){
visible = !(visible*1);
// Optionally here u can call the block & none
if( dir < 0 ) { /* Hiding and hidden*/
Node.style.display = 'none'; // So if were repositioning using position:relative; it will support after hide
}
/* Our animation is finished lets end the continous calls */
return;
}
setTimeout(step,100); // Each step is executated in 100seconds
}
this.animate = function(){
Node.style.display = 'block';
dir *= -1;
start = new Date.getTime();
setTimeout(step,100);
}
}
now you can simply call the function
var magician = new animator('divName');
then toggle its animation by
magician.animate();
Now playing with the timing function you can create whatever possibilities you want as in
return t^2 / ( 2 *3.23423 );
or even higher polynomial equations like
return t^3+6t^2-38t+12;
As you can see our function is very very basic but it explains the point of how to make animations using pure js . you can later on use CSS3 module for animation and trigger those classes with javascript :-)
Or perhaps write a cross browser polyfill using CSS3 where available ( it is faster ) , and JS if not :-) hope that helps

Crossbrowser solution (without jQuery) :
HTML :
<div id="toChange" ></div>
CSS :
#toChange
{
background-color:red;
width:200px;
height:200px;
opacity:0;//IE9, Firefox, Chrome, Opera, and Safari
filter:alpha(opacity=0);//IE8 and earlier
}
Javascript :
var elem=document.getElementById("toChange");
var x=0;
function moreVisible()
{
if(x==1)clearInterval(t);
x+=0.05;
elem.style.opacity=x;
elem.style.filter="alpha(opacity="+(x*100)+")";
}
var t=setInterval(moreVisible,25);
Fiddle demonstration : http://jsfiddle.net/JgxW6/1/

So you have a few jQuery answers but I wouldn't recommend jQuery if fading the div is all you want.
Certainly jQuery makes things easier but it is a lot of overhead for a single simple functionality.
Here is someone that did it with pure JS:
Fade in and fade out in pure javascript
And a CSS3 example:
How to trigger CSS3 fade-in effect using Javascript?

You can use jquery $.show('slow') for the same, if you want to do the same without using jquery then you might be required to code something to show the effect yourself, you may have a look at source of jquery's show function http://james.padolsey.com/jquery/#v=1.6.2&fn=show . alternatively , you can also use fadein() for fade in effect in jquery

Yes you can do it using Jquery. Here is my sample example
$('#divID').click(function() {
$('#book').show('slow', function() {
// Animation complete.
});
});
For details clik here
Thanks.

How to improve image cross-fade performance?

I want to be able to do a cross fade transition on large images whose width is set to 100% of the screen. I have a working example of what I want to accomplish. However, when I test it out on various browsers and various computers I don't get a buttery-smooth transition everywhere.
See demo on jsFiddle: http://jsfiddle.net/vrD2C/
See on Amazon S3: http://imagefader.s3.amazonaws.com/index.htm
I want to know how to improve the performance. Here's the function that actually does the image swap:
function swapImage(oldImg, newImg) {
newImg.css({
"display": "block",
"z-index": 2,
"opacity": 0
})
.removeClass("shadow")
.animate({ "opacity": 1 }, 500, function () {
if (oldImg) {
oldImg.hide();
}
newImg.addClass("shadow").css("z-index", 1);
});
}
Is using jQuery animate() to change the opacity a bad way to go?

You might want to look into CSS3 Transitions, as the browser might be able to optimize that better than Javascript directly setting the attributes in a loop. This seems to be a pretty good start for it:
http://robertnyman.com/2010/04/27/using-css3-transitions-to-create-rich-effects/

I'm not sure if this will help optimize your performance as I am currently using IE9 on an amped up machine and even if I put the browser into IE7 or 8 document mode, the JavaScript doesn't falter with your current code. However, you might consider making the following optimizations to the code.
Unclutter the contents of the main photo stage by placing all your photos in a hidden container you could give an id of "queue" or something similar, making the DOM do the work of storing and ordering the images you are not currently displaying for you. This will also leave the browser only working with two visible images at any given time, giving it less to consider as far as stacking context, positioning, and so on.
Rewrite the code to use an event trigger and bind the fade-in handling to the event, calling the first image in the queue's event once the current transition is complete. I find this method is more well-behaved for cycling animation than some timeout-managed scripts. An example of how to do this follows:
// Bind a custom event to each image called "transition"
$("#queue img").bind("transition", function() {
$(this)
// Hide the image
.hide()
// Move it to the visible stage
.appendTo("#photos")
// Delay the upcoming animation by the desired value
.delay(2500)
// Slowly fade the image in
.fadeIn("slow", function() {
// Animation callback
$(this)
// Add a shadow class to this image
.addClass("shadow")
// Select the replaced image
.siblings("img")
// Remove its shadow class
.removeClass("shadow")
// Move it to the back of the image queue container
.appendTo("#queue");
// Trigger the transition event on the next image in the queue
$("#queue img:first").trigger("transition");
});
}).first().addClass("shadow").trigger("transition"); // Fire the initial event
Try this working demo in your problem browsers and let me know if the performance is still poor.

I had the same problem too. I just preloaded my images and the transitions became smooth again.

The point is that IE is not W3C compliant, but +1 with ctcherry as using css is the most efficient way for smooth transitions.
Then there are the javascript coded solutions, either using js straight (but need some efforts are needed to comply with W3C Vs browsers), or using libs like JQuery or Mootools.
Here is a good javascript coded example (See demo online) compliant to your needs :
var Fondu = function(classe_img){
this.classe_img = classe_img;
this.courant = 0;
this.coeff = 100;
this.collection = this.getImages();
this.collection[0].style.zIndex = 100;
this.total = this.collection.length - 1;
this.encours = false;
}
Fondu.prototype.getImages = function(){
var tmp = [];
if(document.getElementsByClassName){
tmp = document.getElementsByClassName(this.classe_img);
}
else{
var i=0;
while(document.getElementsByTagName('*')[i]){
if(document.getElementsByTagName('*')[i].className.indexOf(this.classe_img) > -1){
tmp.push(document.getElementsByTagName('*')[i]);
}
i++;
}
}
var j=tmp.length;
while(j--){
if(tmp[j].filters){
tmp[j].style.width = tmp[j].style.width || tmp[j].offsetWidth+'px';
tmp[j].style.filter = 'alpha(opacity=100)';
tmp[j].opaque = tmp[j].filters[0];
this.coeff = 1;
}
else{
tmp[j].opaque = tmp[j].style;
}
}
return tmp;
}
Fondu.prototype.change = function(sens){
if(this.encours){
return false;
}
var prevObj = this.collection[this.courant];
this.encours = true;
if(sens){
this.courant++;
if(this.courant>this.total){
this.courant = 0;
}
}
else{
this.courant--;
if(this.courant<0){
this.courant = this.total;
}
}
var nextObj = this.collection[this.courant];
nextObj.style.zIndex = 50;
var tmpOp = 100;
var that = this;
var timer = setInterval(function(){
if(tmpOp<0){
clearInterval(timer);
timer = null;
prevObj.opaque.opacity = 0;
nextObj.style.zIndex = 100;
prevObj.style.zIndex = 0;
prevObj.opaque.opacity = 100 / that.coeff;
that.encours = false;
}
else{
prevObj.opaque.opacity = tmpOp / that.coeff;
tmpOp -= 5;
}
}, 25);
}