Develop Reference

Targeting with Javascript

I am developing a website using the popular fullPage.js framework .
See my basic site: http://212.111.40.154/fullpage
Problem
The slider by default does not automatically scroll through slides, however the following working code does enable automatic scrolling on the slides BUT it applies scrolling to all sliders on the page.
There are two slides in the demo link above, so I need the top slider to scroll automatically but the second slider to not scroll automatically.
Code
How can this code be modified to only apply to one instance of slider.
// Automatic Slider
setInterval(function () {
$.fn.fullpage.moveSlideRight();
}, 3000);
I'm sure others can benefit from your response, I will get fullpage author to add your answer to his FAQ.

Damn it was an easy one :(
Solution:
// Automatic Slider
setInterval(function () {
$('#section0 .fp-controlArrow.fp-next').click();
}, 3000);

Why is my jQuery transition is glitchy?

I have a jQuery transition with a css overlay that will work fine if the user mouses over for a second or more....however if the user mouses over quickly then the overlay text stays put without the overlay background. Here is my jQuery code:
$(".cascade-t1").hover(function(){
$(".cascade-corner").fadeOut();
$(".overlay-t1").animate({"left": "-300px"}, 300, function(){
$(".cascade-overlay-content").fadeIn(200);
});
}, function(){
$(".cascade-corner").fadeIn();
$(".cascade-overlay-content").fadeOut(200, function(){
$(".overlay-t1").animate({"left": "130px"}, 300);
});
});
Here is the script in action

It looks like the issue is that you don't fadeIn() the .overlay-t1 text until the mouseenter animation is done, and on mouseleave you fadeOut() the text out right away before the animation. When you move your mouse in and out faster than initial the animation the code will fade out the text and then fade it in again (the issue you're seeing).
One possible solution is to slightly alter your bottom (mouseleave) function to resemble your top (mouseenter) function more closely. Something like:
$(".cascade-corner").fadeIn();
$(".overlay-t1").stop(true, true).animate({"left": "130px"}, 300, function () {
$(".cascade-overlay-content").fadeOut(200);
});
The .stop() is there to keep the animation from playing over and over when someone spams the box.
FIDDLE DEMO

Not sure how jquery animate works under the hood but it's possible it's using javascript to animate instead of css transitions. The benefit of css transitions is that it does all of the animation calculations before the animation begins and is hardware accelerated. Javascript is at the mercy of the scheduler at a very high level so it will always be choppy.
Try jquery transit.
http://ricostacruz.com/jquery.transit/

Jquery - Adding classes to multiple elements at once?

I'm having issues with jquery and bxslider on my site, i've been racking my brain over this for a while but can't seem to find any way to make it work how i'd like,
I'm building a slider using bxslider and basically i want the current slide to have a class of 'active' or an opacity of 1, whereas i'd want all other images on the sliders to have an opacity of 0.7.
i have a potential 'infinite' number of slides on my page and this is where i seem to be running into problems. (it's being used in a wordpress loop, and each post is coded to pull the images from the post into the slider)
you can see what i've got so far at: http://jsfiddle.net/bu5cd/
$(document).ready(function(){
$('.bxslider').bxSlider({
onSlideBefore: function (currentSlideNumber, totalSlideQty, currentSlideHtmlObject) {
$('img.attachment-thumbnail-size').removeClass('active');
$('img.attachment-thumbnail-size').eq(currentSlideHtmlObject+1).addClass('active')
var current = $('img.attachment-thumbnail-size').attr('id');
}
});
});
you can see it works for the first slider somewhat, but it doesn't carry through to the second slider.
Cheers guys, been racking my brain over this for hours! I'm open to using another slider if that would help achieve the desired result, there doesn't seem to be an awful lot of documentation around for bxslider.

Your first issue is that you have your parameters all wrong in your callback function. The first parameter is a jquery object pointing to the current slide. Then, you are selecting the "n-th" img on the whole page instead of in relation to your current slideshow. Using this current slide jquery object, you can find only the appropriate images instead of affecting all sliders. Try this:
$(document).ready(function () {
$('.bxslider').bxSlider({
onSlideBefore: function ($el) {
/* remove the class from all images of this slider only */
$el.closest(".bxslider")
.find('img.attachment-thumbnail-size')
.removeClass('active');
/* add the class to the image within the current slide */
$el.find('img.attachment-thumbnail-size')
.addClass('active');
}
});
});
http://jsfiddle.net/bu5cd/3/

how to slow down Flowslider slider?

I have a flowslider slider, here the page of the project http://www.flowslider.com/
It's a very easy to use slider however I don't know how to reduce the sliding speed, there's no working example in the site
that's my slider initialization code:
<script>
jQuery(document).ready(function($) {
// Select your slider element and call Flow Slider plugin.
var $slider = $("#slider");
$slider.FlowSlider({
controllerOptions: [{
mouseStart:100,
mouseEnd:100,
}],
marginStart:20,
marginEnd:20,
mode:"horizontal"
});
});
</script>
the actual slider is just a
<div id="slider">
a bunch of PHP generated divs here, each one is a slider element
</div>
I tried setting speed and coefficient but without any results

You can't change the sliding speed, it's because the sliding speed depends on user mouse action ( user mouse movement) and the width of content div and the count of images in it. It means when you move your mouse slowly cross the slides the sliding happens slow and when you do it fast slides goe fast. This slide is not that kind of slides that repeats sliding in a period of time.

As written in the documentation of HoverCenter you can use the coefficient or write your own moveFunction. It seems that a list for controllerOptions is missing in the documentation.
To get coefficient to work, use something like:
$('#flowslider').FlowSlider({
mode: 'horizontal',
marginStart: 0,
marginEnd: 0,
controllers: ['HoverCenter'],
controllerOptions: [{
coefficient: 0.1
}]
});

Masonry/Dynamic Slideshow Height Issues

I'm a little confused with the next steps to take on a project I'm working on and hopefully you could give me some ideas/help.
http://goo.gl/4d72h
I'm using Wordpress, and a combination of Portfolio Slideshow Pro (http://madebyraygun.com/wordpress/plugins/portfolio-slideshow-pro/) and Masonry (http://masonry.desandro.com/index.html) to create the landing page of this project.
As you can see by visiting the site, each 'post' is wrapped in a grid_6 float, allowing two floats per row, and then I am using masonry to place everything together as it does. I've wrapped the masonry code in a (window).load function to wait until all the featured images have loaded and then it starts the masonry. Pretty straightforward.
<script>
$(window).load(function(){
var $container = $('.masonry-cont-area');
$container.imagesLoaded( function(){
$container.masonry({
itemSelector : '.single-fg-post'
});
});
});
</script>
However, the masonry is only taking into consideration the first feature image for it's positioning etc. If you click the images, or the dots, it'll advance to the next image which can be longer or shorter in height, which is causing a few problems. Because the masonry has already taken place, it's overlaping with the next post etc. You can see what I mean when you click on the images on the link given above.
So, what I'm after today, is any ideas on how this can be fixed? Can masonry take the height from the tallest image in the slideshow? Can it changes dynamically as the images are clicked? Can I make sure that a margin at the bottom is ALWAYS given on absolute positioned items?
Any ideas would be really appreciated.
Thanks all,
Richard

You slideshow plugin does not seem to expose any event hooks. So you will have to do it the verbose way ..
Change the code where you initialize the masonry plugin to
$(window).load(function(){
var $container = $('.masonry-cont-area');
$container.imagesLoaded( function(){
$container.masonry({
itemSelector : '.single-fg-post',
isAnimated: true // added this line to make the resizing of the masonry animated and not instant..
});
// whenever we click on a bullet element
$('.pager').on('click','.bullet', function(){
// we use timeout to delay the redrawing of masonry
// because the slideshow takes sometime to fade out the current slide
// and slide in the new one..
// We have to wait until the slideshow has completed its transition before
// redrawing masonry, so that the masonry plugin can use the new slide's dimensions..
setTimeout(function(){
// we make masonry recalculate the element based on their current state.
$container.masonry();
}, 250); // 250 is the milliseconds of delay between the click to the bullet and the calling of the masonry redraw..
});
});
});
See it live at http://jsfiddle.net/XjVWN/embedded/result/

One thing you could do is to call .masonry('reload') when an image is changed.