Develop Reference

How to do line preloader with jquery

I tried this code for a line preloader but it didn't work and i don't know where is the problem.
var $preload = $("<div class='preloader'><div class='percent'></div><div class='line-parent'><div class='line'></div></div></div>");
$("body").prepend($preload);
var $imgs = $("img");
var imgsLoaded = 0;
var ratio = 0;
$imgs.each(function(){
$this = $(this);
$this.load(function(){
imgsLoaded++;
ratio = imgsLoaded / $imgs.length;
$(".percent").html(ratio / 0.01 + "%");
$(".line").animate({
width : ratio / 0.01 + "%"
});
}, function(){
if(ratio === 1){
$(".preloader").fadeOut();
}
});
});

I belive you want to show 100% wenn all images are loaded and do some action. First load event will not work if is atteched after image is already loaded.
I sugest to check for each img comlete and naturalWidth property every 100ms (with setInterval).
Loader = (function() {
var list, img_length, loaded, interval;
function _check_one(i) { o = list[i]; if (o.complete == true && o.naturalWidth > 0) { loaded++; delete list[i]; } };
function _procent(l, a) { console.log((100*loaded/img_length) + '%'); }
function _check_list() { for(var i in list) {_check_one(i)};_procent();_kill(); };
function _kill() { if(img_length <= loaded) clearInterval(interval); }
function _start() { loaded = 0; list = $('img'); img_length = list.length;
if(img_length != loaded) interval = setInterval(_check_list, 100); }
return { start: _start }
})();
Now at end of the body or in $(document).ready(..) you need to call Loader.start();
Or put all images source (src) in data-src attribite, attach load events and copy data-scr to src attribite. In body all relevant images looks like this:
<img data-src="some url">...
In Script Tag:
$('img').on('load', function() {
// Your action.
}).each(function() { var img = $(this); img.attr('src', img.attr('data-src')); });

Jquery - add function to jquery

Hey there i got this fiddle :
http://jsfiddle.net/5H5Xq/42/
containing this jquery:
function anim(selector) {
$(".images img", selector).first().appendTo($('.images', selector)).fadeOut(2000);
$(".images img", selector).first().fadeIn(2000);
}
// Untuk delay gambarnya
var i = 0, max = 3;
myFunction = function(event){
$(".subbox1").each(function() {anim(this)});
i += 1;
if(i >= max) { i = 0; }
}
var interval = setInterval(myFunction, 5000);
$(".slider").hover(function() {
clearInterval(interval);
var img = $('<img>');
img.attr('src', $(this).attr('data-url'));
$('#newImage').html(img);
$('.images').hide();
return false;
i += 1;
$(".subbox1").each(function() {anim(this)});
});
$(".slider").mouseout(
function (){
$('.images').show();
// $('#newImage').hide();
interval = setInterval(myFunction, 5000);
}
);
It just means:
Every 5 seconds => automatic image-change.
When i hover throw a link => image-change + automatic image change disabled.
What i wanted to add to the automatic image-change:
Depending on the current picture, the -item gets a new background-color..is this possible?
greetings

Sure you can. Just change the background-color css attribute of the element depending on your criteria.
if (*your criteria here*) {
element.css("background-color", "#ff0000");
}

how to make hide/show text javascript smoother?

I am using this script to hide and show text however, I want to make the transition smoother but I am not sure how to. Here's a demo of it: http://jsfiddle.net/LnE5U/.
Please help me change it to make it smoother.
hide/show text
<div id="showOrHideDiv" style="display: none">hidden text</div>
<script language="javascript">
function showOrHide()
{
var div = document.getElementById("showOrHideDiv");
if (div.style.display == "block")
{
div.style.display = "none";
}
else
{
div.style.display = "block";
}
}
</script>

Here is an example using jQuery's fadeToggle (a shortcut for a more complicated animate)
// assuming jQuery
$(function () { // on document ready
var div = $('#showOrHideDiv'); // cache <div>
$('#action').click(function () { // on click on the `<a>`
div.fadeToggle(1000); // toggle div visibility over 1 second
});
});
HTML
<a id="action" href="#">hide/show text</a>
<div id="showOrHideDiv" style="display: none;">hidden text</div>
DEMO
An example of a pure JavaScript fader. It looks complicated because I wrote it to support changing direction and duration mid-fade. I'm sure there are still improvements that could be made to it, though.
function generateFader(elem) {
var t = null, goal, current = 0, inProgress = 0;
if (!elem || elem.nodeType !== 1) throw new TypeError('Expecting input of Element');
function visible(e) {
var s = window.getComputedStyle(e);
return +!(s.display === 'none' || s.opacity === '0');
}
function fader(duration) {
var step, aStep, fn, thisID = ++current, vis = visible(elem);
window.clearTimeout(t);
if (inProgress) goal = 1 - goal; // reverse direction if there is one running
else goal = 1 - vis; // else decide direction
if (goal) { // make sure visibility settings correct if hidden
if (!vis) elem.style.opacity = '0';
elem.style.display = 'block';
}
step = goal - +window.getComputedStyle(elem).opacity;
step = 20 * step / duration; // calculate how much to change by every 20ms
if (step >= 0) { // prevent rounding issues
if (step < 0.0001) step = 0.0001;
} else if (step > -0.0001) step = -0.0001;
aStep = Math.abs(step); // cache
fn = function () {
// console.log(step, goal, thisID, current); // debug here
var o = +window.getComputedStyle(elem).opacity;
if (thisID !== current) return;
if (Math.abs(goal - o) < aStep) { // finished
elem.style.opacity = goal;
if (!goal) elem.style.display = 'none';
inProgress = 0;
return;
}
elem.style.opacity = (o + step).toFixed(5);
t = window.setTimeout(fn, 20);
}
inProgress = 1; // mark started
fn(); // start
}
return fader;
}
And using it
window.addEventListener( // this section matches the code above
'load',
function () {
var fader = generateFader(document.getElementById('showOrHideDiv'));
document.getElementById('action').addEventListener(
'click',
function () {
fader(1000);
}
);
}
);
DEMO of this

This is quite simple. I have just made a demo and i used setInterval
Here's how it works
var fadeout = function( element ) { // 1
element.style.opacity = 1; // 2
window.setInterval(function() { // 3
if(element.style.opacity > 0) { // 4
element.style.opacity = parseFloat(element.style.opacity - 0.01).toFixed(2); // 5
} else {
element.style.display = 'none'; // 6
}
}, 50);
};
JSFiddle Demo Link
Steps
Create a function that accepts a DOM element
Set the opacity of the element to 1
Create a function that loops every 50ms
If the opacity is greater than 0 -> continue
Take away 0.01 from the opacity
if it's less than 0 the animation is complete and hide it completely
Note this is a really simple example and will need a bit of work

You can use somthing like this
$('.showOrHideDiv').toggle(function() {
$('showOrHideDiv').fadeIn('slow', function() {
//fadeIn or fadeOut, slow or fast, all the stuffs you want to trigger, "a function to execute every odd time the element is clicked," says the [jquery doc][1]
});
}, function() {
//here comes "additional handlers to cycle through after clicks," says the [jquery doc][1]
});

I used OPACITY to make it show/hide. See this Example, Full code (without jQuery):
Click here
<div id="MyMesage" style="display:none; background-color:pink; margin:0 0 0 100px;width:200px;">
blablabla
</div>
<script>
function ShowDiv(name){
//duration of transition (1000 miliseconds equals 1 second)
var duration = 1000;
// how many times should it should be changed in delay duration
var AmountOfActions=100;
var diiv= document.getElementById(name);
diiv.style.opacity = '0'; diiv.style.display = 'block'; var counte=0;
setInterval(function(){counte ++;
if ( counte<AmountOfActions) { diiv.style.opacity = counte/AmountOfActions;}
},
duration / AmountOfActions);
}
</script>

I followed iConnor solution and works fine but it had a small issue setInterval will not stop after the element be hidden I added stop interval to make it better performance
var fadeout = function( element ) { // 1
element.style.opacity = 1; // 2
let hidden_process = window.setInterval(function() { // 3
if(element.style.opacity > 0) { // 4
element.style.opacity = parseFloat(element.style.opacity - 0.01).toFixed(2); // 5
} else {
element.style.display = 'none'; // 6
console.log('1');
clearInterval(hidden_process);
}
}, 50);
};

Jquery = setInterval code works in Firefox but not in Chrome

The code (from an old plugin that I am trying to make responsive) slides a set of images across every n seconds. It uses setInterval code as below, and works well on Firefox. On Chrome it runs once only, and debugging indicates that the second setInteral function is just not called. Please help as its diving me mad. Running example at http://lelal.com/test/site10/index.html (sorry about the load time)
play = setInterval(function() {
if (!busy) {
busy = true;
updateCurrent(settings.direction);
slide();
}
}, settings.speed);
The complete plugin code is below (sorry its long)
/*
* jQuery Queue Slider v1.0
* http://danielkorte.com
*
* Free to use and abuse under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*/
(function($){
var QueueSlider = function(element, options) {
var play = false,
busy = false,
current = 2,
previous = 2,
widths = [],
slider = $(element),
queue = $('ul.queue', slider),
numImages = $('img', queue).size(),
viewportWidth = slider.width(),
settings = $.extend({}, $.fn.queueSlider.defaults, options);
$(window).resize(function(){
if(busy !== false)
clearTimeout(busy);
busy = setTimeout(resizewindow, 200); //200 is time in miliseconds
});
function resizewindow() {
viewportWidth = slider.width();
if (settings.scale > 0) {
slider.css('height',viewportWidth * settings.scale);
computeQueueWidth();
}
queue.css('left', -getQueuePosition());
busy = false;
}
function requeue() {
$('li', queue).each(function(key, value) {
$(this).attr('class', 'slide-' + (key+1));
});
}
function updateCurrent(dir) {
current += dir;
if (current < 1) {
current = numImages;
} else if (current > numImages) {
current = 1;
}
}
function getQueuePosition() {
var i = 0, index = current-1,
queuePosition = (viewportWidth - widths[index]) / -2;
for (i = 0; i < index; i++) { queuePosition += widths[i]; }
return queuePosition;
}
function computeQueueWidth() {
var queueWidth = 0;
// factor = slider.height() / settings.imageheight;
// settings.imageheight = settings.imageheight * factor;
// Get the image widths and set the queue width to their combined value.
$('li', queue).each(function(key, value) {
var slideimg = $("img", this),
slide = $(this),
// width = slide.width() * factor,
width = slideimg.width();
slide.css('width', width+'px');
queueWidth += widths[key] = width;
});
queue.css('width', queueWidth + 500);
}
function slide() {
var animationSettings = {
duration: settings.transitionSpeed,
queue: false
};
// Emulate an infinte loop:
// Bring the first image to the end.
if (current === numImages) {
var firstImage = $('li.slide-1', queue);
widths.push(widths.shift());
queue.css('left', queue.position().left + firstImage.width()).append(firstImage);
requeue();
current--; previous--;
}
// Bring the last image to the beginning.
else if (current === 1) {
var lastImage = $('li:last-child', queue);
widths.unshift(widths.pop());
queue.css('left', queue.position().left + -lastImage.width()).prepend(lastImage);
requeue();
current = 2; previous = 3;
}
// Fade in the current and out the previous images.
if (settings.fade !== -1) {
$('li.slide-'+current, queue).animate({opacity: 1}, animationSettings);
$('li.slide-'+previous, queue).animate({opacity: settings.fade}, animationSettings);
}
// Animate the queue.
animationSettings.complete = function() { busy = false; };
queue.animate({ left: -getQueuePosition() }, animationSettings);
previous = current;
}
//
// Setup the QueueSlider!
//
if (numImages > 2) {
// Move the last slide to the beginning of the queue so there is an image
// on both sides of the current image.
if (settings.scale > 0) {
slider.css('height',viewportWidth * settings.scale);
}
computeQueueWidth();
widths.unshift(widths.pop());
queue.css('left', -getQueuePosition()).prepend($('li:last-child', queue));
requeue();
// Fade out the images we aren't viewing.
if (settings.fade !== -1) { $('li', queue).not('.slide-2').css('opacity', settings.fade); }
// Include the buttons if enabled and assign a click event to them.
if (settings.buttons) {
slider.append('<button class="previous" rel="-1">' + settings.previous + '</button><button class="next" rel="1">' + settings.next + '</button>');
$('button', slider).click(function() {
if (!busy) {
busy = true;
updateCurrent(parseInt($(this).attr('rel'), 10));
clearInterval(play);
slide();
}
return false;
});
}
// Start the slideshow if it is enabled.
if (settings.speed !== 0) {
play = setInterval(function() {
if (!busy) {
busy = true;
updateCurrent(settings.direction);
slide();
}
}, settings.speed);
}
}
else {
// There isn't enough images for the QueueSlider!
// Let's disable the required CSS and show all one or two images ;)
slider.removeClass('queueslider');
}
};
$.fn.queueSlider = function(options) {
return this.each(function(key, value) {
var element = $(this);
// Return early if this element already has a plugin instance.
if (element.data('queueslider')) { return element.data('queueslider'); }
// Pass options to plugin constructor.
var queueslider = new QueueSlider(this, options);
// Store plugin object in this element's data.
element.data('queueslider', queueslider);
});
};
$.fn.queueSlider.defaults = {
scale: 0,
imageheight: 500,
fade: 0.3, // Opacity of images not being viewed, use -1 to disable
transitionSpeed: 700, // in milliseconds, speed for fade and slide motion
speed: 7000, // in milliseconds, use 0 to disable slideshow
direction: 1, // 1 for images to slide to the left, -1 to silde to the right during slideshow
buttons: true, // Display Previous/Next buttons
previous: 'Previous', // Previous button text
next: 'Next' // Next button text
};
}(jQuery));

Have a look here:
http://www.w3schools.com/jsref/met_win_setinterval.asp
The setInterval() method will continue calling the function until clearInterval() is called, or the window is closed.
Looks like you're calling clearInterval after the first usage of play, which makes it stop working.

Can i create a javascript carousel which contains a flash file as well as static images?

I was wondering if it's possible to include an swf within a javascript carousel that currently just contains stagic images. What I'm looking to do is include a flash animation within the carousel.
I guess I've got two main questions:
Is it possible to cycle through flash files in the same way as an image?
How would I get the javascript and flash to interact so the flash file would know when it had been selected?
If it helps, here's the js we're using:
$(document).ready(function(){
var $looper = true;
var timer;
var currentSlide = 0;
var cell = 0;
var row = 1;
var hCycles = 0;
var aCycles = 0;
//no. of full cycles
var homecycles = 2;
var aboutcycles = 2;
//aboutSlide speed
var fast = 1200;
var slow = 4000;
//hide homepage slides
$('#slide2').fadeOut(0);
$('#slide3').fadeOut(0);
$('#slide4').fadeOut(0);
$('#slide5').fadeOut(0);
$('#slide6').fadeOut(0);
//hide about slides
$('.a-slide1').fadeOut(0);
$('.a-slide2').fadeOut(0);
$('.a-slide3').fadeOut(0);
$('.a-slide4').fadeOut(0);
$('#slide-c1 .a-slide1').fadeIn(1200);
runSlide(fast);
function runSlide(x) {
if ($('body').is('.about')) {
setTimeout(function() {
aboutSlides();
}, x);
} else {
if ($looper) {
setTimeout(function() {
slideShow();
}, 4000);
}
}
}
function slideShow() {
if ($looper) {
if (currentSlide++ < 6 && hCycles < homecycles) {
$('#slide'+ currentSlide).fadeOut(1200);
if (currentSlide == 6) {
$('#slide1').fadeIn(1200);
$('#slide-wrapper li').removeClass('active');
$('#btn1').addClass('active');
currentSlide = 0;
hCycles = hCycles+1;
} else {
$('#slide'+ (currentSlide+1)).fadeIn(1200);
$('#slide-wrapper li').removeClass('active');
$('#btn'+ (currentSlide+1)).addClass('active');
}
runSlide();
} else {
$looper = false;
}
}
};
$('#slide-wrapper li').each(function(index) {
$('#btn'+(index+1)).click(function(){
$looper = false;
$('.slide').fadeOut(1200);
$('#slide'+ (index+1)).fadeIn(1200);
$('#slide-wrapper li').removeClass('active');
$(this).addClass('active');
});
});
function aboutSlides() {
if (cell++ < 3 && aCycles < aboutcycles) {
if (cell == 3) {
if (row < 3) {
row = row+1;
} else {
row = 1;
aCycles = aCycles+1;
}
var hide = (row-1);
if ((row-1) == 0) {hide = 3}
$('#slide-c1 .a-slide'+ hide).fadeOut(1200);
$('#slide-c1 .a-slide'+row).fadeIn(1200);
cell = 0;
runSlide(fast);
} else {
$('#slide-c'+(cell+1)+' .a-slide'+ (row-1)).fadeOut(1200);
$('#slide-c'+(cell+1)+' .a-slide'+(row)).fadeIn(1200);
if (cell == 2) {
runSlide(slow);
} else {
runSlide(fast);
}
}
} else {
// create the final strip
$('#slide-c3 .a-slide3').fadeOut(1200);
$('#slide-c3 .a-slide4').fadeIn(1200);
}
}
});
Thanks!

There isn't any problem as to whatever content you want to put in your slides. As long as it is valid html, it's valid in a slide. Countless jquery/motools/etc plugins let you specify whatever you want for content.
flash is valid.
But you might want to revert to another revealing method. setting the opacity on a swf from javascript is complex and yields to different results, according to browser and flash version. If your flash file is custom made, then you can create a function that fades it to white for example, and call it from javascript. But from experience, changing the opacity of a swf is calling for trouble.
I don't know if this is relevant enough to be an answer, I wanted to post it as a comment, but there isn't any comment button. Oh well.