Develop Reference

AJAX loaded content with lightbox2

I'm using the Lightbox2 script and the content of my page is loaded via an AJAX request.
I don't find any function to attach new images or initialize Lightbox2 after an AJAX request, How can I make that in order to use Lightbox2 for images loaded via AJAX ?
Léo

I had to reinitialize lightbox in order to detect new images. I have done that like this:
window.lightbox.init();
I placed this code in my success handler of ajax call after I have added the new content:
contentContainer.empty().html(data);

From the documentation files: http://lokeshdhakar.com/projects/lightbox2/
You do not need to initiate anything, any image link with the data-lightbox attribute like this:
Image #1
will work automagically even if loaded by AJAX as soon as you add it to your DOM.
EDIT: After having taken a look at the lightbox script, you may have to change as well the line #51:
$('body').on('click', 'a[rel^=lightbox], area[rel^=lightbox], a[data-lightbox], area[data-lightbox]', function(event) {
into this:
$('body').live('click', 'a[rel^=lightbox], area[rel^=lightbox], a[data-lightbox], area[data-lightbox]', function(event) {

jQuery Tabs - Don't Load Tab via # (tab content id)

I am running jQuery v2.1.1-beta1 & jquery-ui-1.10.4 with the following JS in my script file:
$(document).ready(function(){
$('.festival-list').tabs({
beforeActivate: function( event, ui ) {
ui.newTab.index();
}
});
};
I would like to solve the 2 issues:
Problem 1:
I have a series of tabs which work fine. I have a tab with an li with an id of Press (#press). If I load the url (http://website-url.com/news/#press). The content (tab block) shows properly.
However when this url is used as an href in a footer a link the page loads but fails to load the tab (#press) correctly. At present I have to click the footer link then the relevant tab to load the block, there is no automation.
Problem 2:
Secondly I would like to hash to the url, hopefully this will help UI during navigation.

The hash in the url only works on the initial load because the $.ready function is only run once (on page load). If you want to make sure the tabs & URL match each other after the page load, you could do something like
$(window).on('hashchange', function processHashChange(e) {
...
});
If you're looking for more of a site-wide solution, especially if you want the UI to do complex behaviors based on the URL hash (e.g. more than hide/show a tab in one part of a page), you might want to look into a proper JavaScript routing library like Crossroads.

JS function to preload images before page load

I need a javascript code which loads an image into browser cache. What is the usage? read this:
When the user logs into my site, she/he gets redirected to a page which is "Redirecting you to control panel" and a progress is displayed there too. Now, this "redirector" page has a background, since user experience this page and sees it only 3 seconds, many times, background image is missed and there remains no chance for it to be loaded, since from the page load till the page redirection there is only 3 seconds gap. Here is en example of my ajax login:
$.ajax({
// do ajax stuff
success : function(msg)
{
if(msg==true)
{
// I NEED A FUNCTION HERE TO LOAD THEM IMAGE INTO CACHE BEFORE THIS PAGE
// TO LOAD THE REDIRECTOR PAGE. USING THIS, I CAN ENSURE THE EXISTENCE OF THE
// BG IMAGE WHEN THE USER SEES NEXT PAGE. THIS BG IMAGE IS INDEED NEXT PAGE'S BG
window.locatio.href = 'process/redirection/to/user-panel';
}
}
});

This function will work:
function preloadImage(url)
{
var img = new Image();
img.src = "/test/example.jpg";
}
Also, here is a question that discusses something similar, pre-loading images on a splash screen, but the implementation is far more complex.
On the subject, if you don't have to use JavaScript, another solution using CSS and XHTML that could probably work on the redirect page can be found here. Otherwise, the code at the top should work. Hope this helps, good luck.

Nivoslider (within dynamic ajax content) doesn't load images on first load

I am developing a website (jQuery + Ajax) and I stumbled on a problem. When a page loads dynamically (for the first time, images aren't cached yet), it doesn't display the images. When I recall the ajax load function, suddenly my pictures are there.
$("#overlayInner").load(source+" #loader",function() {
$('#workImgs').nivoSlider();
});
I call nivoSlider on my dynamic page outside my loader div, so people who arrive directly on this page, can see the images as well.
<script type="text/javascript">
$(function(){
$('#workImgs').nivoSlider();
});
</script>
When you try to load the page without Ajax, the images load like they should.
Any ideas?

It is hard to make experiments in your website :) but you can try to add to each loading page (4d.html, dokerpoot.html and vuylsteke.html) the code for image preloading (in the start of the body tag). I used example images from vuylsteke.html:
<script type="text/javascript">
var images = [
'images/work/kapsalon2.jpg',
'images/work/kapsalon3.jpg',
'images/work/kapsalon4.jpg'
];
$(images).each(function() {
$('<img/>')[0].src = this;
});
</script>
Since the fragment load function after get parses the returned document to find the element with an ID of container, the idea is to let it first to load these images into memory, and then start to parse the document, and finally initialize Nivoslider. Possibly it will help.

I had this issue with content being loaded from a database. It turns out it was being caused by the Images not having a width or height set. This means that the plugin didn't know the size of the images and didn't show them but the browser calc'd these properties after the re-load so it showed the second time around.
Setting a width and height resolved this.

Pull in HTML resource in the background in jQuery

On a page, there is a button. When the button is clicked, a dropdown shows up. The dropdown contains an image. The problem is that the image is not fetched until the user clicks the button.
$("#my_button").click(function(){
$("#my_dropdown").html("<img src=\"http://mysite.com/image.jpg\" />");
});
I'd like to fetch the image when the page loads so it's ready to go when the user clicks the dropdown. How can I do this? I was thinking I could insert the image into the page with display:none set, so it'll get in the cache, or is there a way to load in when the document loads in jQuery?
This is for a Chrome extension, if it makes any difference. I suppose I could put the image in the extension (and that would be faster), but I'm still curious if it's possible to load the image using JS.
Thanks,
Kevin

Yes. Just define it as a new image in the ready() call of the page:
$(document).ready( function() {
var preload = new Image();
preload.src = "http://mysite.com/image.jpg";
});
Then when you use it, it will already be in the browser's cache. You can use the variable or just reference it the same way you already are.

You could preload each image...
$(document).ready(function() {
(new Image()).src = '/path/to/myImage.jpg';
});