Inconsistent Slide Animation in a JavaScript Switch

Inconsistent Slide Animation in a JavaScript Switch - javascript

I am trying to implement a left/right sliding animation inside of a JavaScript switch statement and the animation (sliding left and right without a bounce effect and no whitespace in between images) is not consistently activating. Also, the slide animation still activates when the previous button is clicked on the first slide and when the next button is clicked on the last slide. This should not be happening. Does anyone have any thoughts? Please see the code example.
$(function() {
// USER EDITABLE CONTROLS
var content = 'img'; // accepts any DOM element - div, img, table, etc...
var showControls = true; // true/false shows/hides the slider's navigational controls
var transition = 'slide'; // supports default, fade, slide
var transitionDuration = .5; // adjust the time of the transition measured in seconds
// VARIABLE DECLARATIONS
var contentType = $(content);
var $el = $('#showcase');
var $leftArrow = '#left_arrow';
var $rightArrow = '#right_arrow';
var $load = $el.find(contentType)[0];
var slideCount = $el.children().length;
var slideNum = 1;
// PRELOADS SLIDE WITH CORRECT SETTINGS
$load.className = 'active';
// ADD SLIDER CONTROLS TO PAGE
if (showControls === true) {
$('<div id="controls">« Previous Next »</div>').insertAfter('#showcase');
$('#controls').find('#left_arrow').addClass('disabled');
}
// LOGIC FOR SLIDE TRANSITIONS
function transitions() {
switch (transition) {
// FADE TRANSITION
case 'fade':
$('.slide').stop().animate({opacity : 0}, transitionDuration*300, function(){
$('.active').stop().animate({opacity : 1}, transitionDuration*1000);
});
break;
// SLIDE TRANSITION
case 'slide':
if (slideNum > 1) {
$('.slide').stop().animate({left : -160}, transitionDuration*800, function(){
$('.active').stop().animate({left : 0}, transitionDuration*1000);
});
}
if (slideNum < slideCount) {
$('.slide').stop().animate({left : 160}, transitionDuration*800, function(){
$('.active').stop().animate({left : 0}, transitionDuration*1000);
});
}
break;
// DEFAULT TRANSITION
case 'default':
break;
}
}
// CHECKS FOR FIRST AND LAST INDEX IN THE SLIDER
function checkSlide() {
if (slideNum == 1) {
$($leftArrow).addClass('disabled');
} else {
$($leftArrow).removeClass('disabled');
}
if (slideNum == slideCount) {
$($rightArrow).addClass('disabled');
} else {
$($rightArrow).removeClass('disabled');
}
}
// NAVIGATIONAL LOGIC FOR PREVIOUS/NEXT BUTTONS
$(document).on('click', $leftArrow, function() {
if (slideNum > 1) {
var counter = $('.active').index();
counter--;
$('.active').addClass('slide');
$('.active').removeClass('active');
transitions();
$el.find(contentType).eq(counter).addClass('active');
slideNum--;
checkSlide();
}
})
$(document).on('click', $rightArrow, function() {
if (slideNum < slideCount) {
var counter = $('.active').index();
counter++;
$('.active').addClass('slide');
$('.active').removeClass('active');
transitions();
$el.find(contentType).eq(counter).addClass('active');
slideNum++;
checkSlide();
}
})
});
#showcase {
width: 160px;
overflow: hidden;
}
img {
width: 160px;
}
a {
color: blue;
}
.disabled {
color: red !important;
}
.slide {
display: none;
opacity: 0;
position: relative;
left: 0px;
right: 0px;
}
.active {
display: block;
opacity: 1;
position: relative;
left: 0px;
right: 0px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="showcase">
<img class="slide" src="https://picsum.photos/458/354" />
<img class="slide" src="https://picsum.photos/458/354/?image=306" />
<img class="slide" src="https://picsum.photos/458/354/?image=626" />
</div>

As said in the comments you need to fix your conditional statements. Awhile ago you had set two click handlers - one of which is binded (and is triggered regardless of any condition) when the other handler is triggered, this caused the slide animation still activates when the previous button is clicked on the first slide and when the next button is clicked on the last slide issue.
As for the animations, see my code below. I hacked your conditions a litte. When previous is clicked, the slide is to move from left to right. When next is clicked the slide is to move from right to left. I used a flag to determine the movement it will make - see the new paramter for transition function
$(function() {
// USER EDITABLE CONTROLS
var content = 'img'; // accepts any DOM element - div, img, table, etc...
var showControls = true; // true/false shows/hides the slider's navigational controls
var transition = 'slide'; // supports default, fade, slide
var transitionDuration = .5; // adjust the time of the transition measured in seconds
// VARIABLE DECLARATIONS
var contentType = $(content);
var $el = $('#showcase');
var $leftArrow = '#left_arrow';
var $rightArrow = '#right_arrow';
var $load = $el.find(contentType)[0];
var slideCount = $el.children().length;
var slideNum = 1;
// PRELOADS SLIDE WITH CORRECT SETTINGS
$load.className = 'active';
// ADD SLIDER CONTROLS TO PAGE
if (showControls === true) {
$('<div id="controls">« Previous Next »</div>').insertAfter('#showcase');
$('#controls').find('#left_arrow').addClass('disabled');
}
// LOGIC FOR SLIDE TRANSITIONS
function transitions(impl = null) {
switch (transition) {
// FADE TRANSITION
case 'fade':
$('.slide').stop().animate({
opacity: 0
}, transitionDuration * 300, function() {
$('.active').stop().animate({
opacity: 1
}, transitionDuration * 1000);
});
break;
// SLIDE TRANSITION
case 'slide':
if (impl == "next") {
$('.slide').css("left", '160px');
$('.slide').stop().animate({
left: 160
}, transitionDuration * 800, function() {
$('.active').stop().animate({
left: 0
}, transitionDuration * 1000);
});
} else if (impl == "prev") {
$('.slide').css("left", '-160px');
$('.slide').stop().animate({
left: -160
}, transitionDuration * 800, function() {
$('.active').stop().animate({
left: 0
}, transitionDuration * 1000);
});
}
break;
// DEFAULT TRANSITION
case 'default':
break;
}
}
// CHECKS FOR FIRST AND LAST INDEX IN THE SLIDER
function checkSlide() {
if (slideNum == 1) {
$($leftArrow).addClass('disabled');
} else {
$($leftArrow).removeClass('disabled');
}
if (slideNum == slideCount) {
$($rightArrow).addClass('disabled');
} else {
$($rightArrow).removeClass('disabled');
}
}
// NAVIGATIONAL LOGIC FOR PREVIOUS/NEXT BUTTONS
$(document).on('click', $leftArrow, function() {
if (slideNum > 1) {
var counter = $('.active').index();
counter--;
$('.active').addClass('slide');
$('.active').removeClass('active');
transitions('prev');
$el.find(contentType).eq(counter).addClass('active');
slideNum--;
checkSlide();
}
})
$(document).on('click', $rightArrow, function() {
if (slideNum < slideCount) {
var counter = $('.active').index();
counter++;
$('.active').addClass('slide');
$('.active').removeClass('active');
transitions('next');
$el.find(contentType).eq(counter).addClass('active');
slideNum++;
checkSlide();
}
})
});
#showcase {
width: 160px;
overflow: hidden;
}
img {
width: 160px;
}
a {
color: blue;
}
.disabled {
color: red !important;
}
.slide {
display: none;
opacity: 0;
position: relative;
left: 0px;
right: 0px;
}
.active {
display: block;
opacity: 1;
position: relative;
left: 0px;
right: 0px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="showcase">
<img class="slide" src="https://picsum.photos/458/354" />
<img class="slide" style="left: 160px;" src="https://picsum.photos/458/354/?image=306" />
<img class="slide" style="left: 160px;" src="https://picsum.photos/458/354/?image=626" />
</div>

Related

"Working" script returning Uncaught DOMException: Failed to execute 'insertBefore' on 'Node': The new child element contains the parent

I'm building a page that first gets the HTML data from an external page (Not cross domain), then after the first function completes, it runs a function which is a sideshow. It works... More or less...
The problem that I'm having is that after 5 or 6 slides, the whole thing gets messy and then everything disappears. When checking the console, I found the following message:
Uncaught DOMException: Failed to execute 'insertBefore' on 'Node': The new child element contains the parent.
at HTMLDivElement.<anonymous> (xxxxxxxxxxxxxxxxx.com/jquery/jquery-1.12.4.js:6297:21)
at domManip (xxxxxxxxxxxxxxxxx.com/jquery/jquery-1.12.4.js:6066:14)
at jQuery.fn.init.after (xxxxxxxxxxxxxxxxx/jquery/jquery-1.12.4.js:6295:10)
at HTMLDivElement.<anonymous> (xxxxxxxxxxxxxxxxx.com/go/scripts/jqueryautoscroll/autoscroll.js:41:47)
at HTMLDivElement.opt.complete (xxxxxxxxxxxxxxxxx/jquery/jquery-1.12.4.js:7900:12)
at fire (xxxxxxxxxxxxxxxxx.com/jquery/jquery-1.12.4.js:3232:31)
at Object.fireWith [as resolveWith] (xxxxxxxxxxxxxxxxx/jquery/jquery-1.12.4.js:3362:7)
at tick (xxxxxxxxxxxxxxxxx.com/jquery/jquery-1.12.4.js:7755:14)
at jQuery.fx.tick (xxxxxxxxxxxxxxxxx.com/jquery/jquery-1.12.4.js:8069:9)
I presume it has something to do with the container.find(elm + ':first').before(container.find(elm + ':last'));
So I tried commenting all the lines, the error was gone, but then the sliders wouldn't change.
My code is as follows:
jQuery(document).ready(function ($) {
$("#jobshome").load("jobs/newest-jobs .js-toprow", function(){
//rotation speed and timer
var speed = 3000;
var run = setInterval(rotate, speed);
var slides = $('.js-toprow');
var container = $('#jobshome');
var elm = container.find(':first-child').prop("tagName");
var item_height = container.height();
var previous = 'prevabc'; //id of previous button
var next = 'nextabc'; //id of next button
slides.height(item_height); //set the slides to the correct pixel height
container.parent().height(item_height);
container.height(slides.length * item_height); //set the slides container to the correct total height
container.find(elm + ':first').before(container.find(elm + ':last'));
resetSlides();
//if user clicked on prev button
$('#buttonsabc a').click(function (e) {
//slide the item
if (container.is(':animated')) {
return false;
}
if (e.target.id == previous) {
container.stop().animate({
'top': 0
}, 1500, function () {
container.find(elm + ':first').before(container.find(elm + ':last'));
resetSlides();
});
}
if (e.target.id == next) {
container.stop().animate({
'top': item_height * -2
}, 1500, function () {
container.find(elm + ':last').after(container.find(elm + ':first'));
resetSlides();
}
);
}
//cancel the link behavior
return false;
});
//if mouse hover, pause the auto rotation, otherwise rotate it
container.parent().mouseenter(function () {
clearInterval(run);
}).mouseleave(function () {
run = setInterval(rotate, speed);
});
function resetSlides() {
//and adjust the container so current is in the frame
container.css({
'top': -1 * item_height
});
}
});
//a simple function to click next link
//a timer will call this function, and the rotation will begin
function rotate() {
jQuery('#nextabc').click();
}
});
#carouselabc {
position: relative;
width: 60%;
margin: 0 auto;
}
#slidesabc {
overflow: hidden;
position: relative;
width: 100%;
height: 250px;
}
#areadoslideabc {
list-style: none;
width: 100%;
height: 250px;
margin: 0;
padding: 0;
position: relative;
}
#slidesabcdef {
width: 100%;
height: 250px;
float: left;
text-align: center;
position: relative;
font-family: lato, sans-serif;
}
/* Styling for prev and next buttons */
.btn-barabc {
max-width: 346px;
margin: 0 auto;
display: block;
position: relative;
top: 40px;
width: 100%;
}
#buttonsabc {
padding: 0 0 5px 0;
float: right;
}
#buttonsabc a {
text-align: center;
display: block;
font-size: 50px;
float: left;
outline: 0;
margin: 0 60px;
color: #b14943;
text-decoration: none;
display: block;
padding: 9px;
width: 35px;
}
a#prevabc:hover,
a#next:hover {
color: #FFF;
text-shadow: .5px 0px #b14943;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="carouselabc">
<div class="btn-barabc">
<div id="buttonsabc">
<a id="prevabc" href="#">Previous</a>
<a id="nextabc" href="#">Next</a>
</div>
</div>
<div id="slidesabc">
<div id="jobshome"></div>
</div>
</div>
Screenshot 1
Screenshot 2
This is how it starts

Your problem seems to happen because of the nested selectors (.js-toprow) that are later moved.
Try replacing all the .find() (matches children any level deep) with .children() (matches only immediate children).
jQuery(document).ready(function ($) {
$("#jobshome").load("jobs/newest-jobs .js-toprow", function(){
//rotation speed and timer
var speed = 3000;
var run = setInterval(rotate, speed);
var slides = $('.js-toprow');
var container = $('#jobshome');
var elm = container.children(':first-child').prop("tagName");
var item_height = container.height();
var previous = 'prevabc'; //id of previous button
var next = 'nextabc'; //id of next button
slides.height(item_height); //set the slides to the correct pixel height
container.parent().height(item_height);
container.height(slides.length * item_height); //set the slides container to the correct total height
container.children(elm + ':first').before(container.children(elm + ':last'));
resetSlides();
//if user clicked on prev button
$('#buttonsabc a').click(function (e) {
//slide the item
if (container.is(':animated')) {
return false;
}
if (e.target.id == previous) {
container.stop().animate({
'top': 0
}, 1500, function () {
container.children(elm + ':first').before(container.children(elm + ':last'));
resetSlides();
});
}
if (e.target.id == next) {
container.stop().animate({
'top': item_height * -2
}, 1500, function () {
container.children(elm + ':last').after(container.children(elm + ':first'));
resetSlides();
}
);
}
//cancel the link behavior
return false;
});
//if mouse hover, pause the auto rotation, otherwise rotate it
container.parent().mouseenter(function () {
clearInterval(run);
}).mouseleave(function () {
run = setInterval(rotate, speed);
});
function resetSlides() {
//and adjust the container so current is in the frame
container.css({
'top': -1 * item_height
});
}
});
//a simple function to click next link
//a timer will call this function, and the rotation will begin
function rotate() {
jQuery('#nextabc').click();
}
});

Javascript only add a class to an element on an interval after it's come into viewport

I have a series of images I want to transition from 0 opacity to 1 opacity when they come into the view port. I have the viewport check part done and the adding classes, however I would like them to be on an interval, so once the first 3 images come into the view port they appear 1, 2, 3 every .5seconds or so. Instead of all 3 at the same time.
here's a JS fiddle of how it works currently
reveal();
function reveal() {
var reveal = document.querySelectorAll(".reveal");
window.onscroll = function() {
for(var i = 0; i < reveal.length; i++) {
if(checkVisible(reveal[i]) === true) {
reveal[i].classList.add("fade");
}
}
}
};
function checkVisible(elm) {
var rect = elm.getBoundingClientRect();
var viewHeight = Math.max(document.documentElement.clientHeight, window.innerHeight);
return !(rect.bottom < 0 || rect.top - viewHeight >= -200);
}
https://jsfiddle.net/u04sy7jb/

I've modified your code to add a transition-delay of an additional .5 seconds for each element after the first one, in each "group" that is revealed as you scroll. I left comments in the JavaScript so you can understand the changes.
Let me know if you have any questions!
Live demo:
reveal();
function reveal() {
var reveal = document.querySelectorAll(".reveal");
window.onscroll = function() {
// start a new count each time user scrolls
count = 0;
for (var i = 0; i < reveal.length; i++) {
// also check here if the element has already been faded in
if (checkVisible(reveal[i]) && !reveal[i].classList.contains("fade")) {
// add .5 seconds to the transition for each
// additional element currently being revealed
reveal[i].style.transitionDelay = count * 500 + "ms";
reveal[i].classList.add("fade");
// increment count
count++;
}
}
}
};
function checkVisible(elm) {
var rect = elm.getBoundingClientRect();
var viewHeight = Math.max(document.documentElement.clientHeight, window.innerHeight);
return !(rect.bottom < 0 || rect.top - viewHeight >= -200);
}
.container {
width: 100%;
height: 1200px;
background-color: orange;
}
.reveal {
display: inline-block;
width: 32%;
margin: 0 auto;
height: 400px;
background-color: pink;
border: 1px solid black;
opacity: 0;
}
.fade {
opacity: 1;
transition: 1s;
}
<div class="container">
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
<div class="reveal"></div>
</div>

You could be able to stick your reveal[i].classList.add("fade"); inside of a setTimeout that executes as a function of your ith element so they show up how you're describing. Here is an example of adding short function to add the class and using it in a setTimeout to make this happen, although you could change it up to meet any additional needs.
function reveal() {
var reveal = document.querySelectorAll(".reveal");
window.onscroll = function() {
for(var i = 0; i < reveal.length; i++) {
if(checkVisible(reveal[i]) === true) {
addMyFadeClass(reveal[i], i)
}
}
}
};
function addMyFadeClass(element, i) {
setTimeout(function() {
element.classList.add("fade");
}, i * 500)
}

You can also use :nth-child CSS selectors without the need to change the JS:
.reveal:nth-child(3n+1).fade {
opacity: 1;
transition: 1s;
}
.reveal:nth-child(3n+2).fade {
opacity: 1;
transition: 1.5s;
}
.reveal:nth-child(3n).fade {
opacity: 1;
transition: 2s;
}
JSFiddle: https://jsfiddle.net/u04sy7jb/8/

How to scrollLock body when a modal/lightbox is open

I am using the lightbox jquery plugin to open a lightbox when a user clicks on a product. Often the lightbox content stretches below the fold, and at the moment the right scrollbar moves the entire page when you scroll down.
I'd like it to work like the pinterest lightbox, whereby the right scrollbar only scrolls the lightbox, and the rest of the page stays fixed. I've seen a few posts on this, but nothing seems to work for me.
Problem is I want the lightbox to scroll if the content is bigger than the viewport of the browser but not the background.
CSS:
#lightbox{ position: absolute; left: 0; width: 100%; z-index: 100; text-align: center; line-height: 0;}
#lightbox img{ width: auto; height: auto;}
#lightbox a img{ border: none; }
#outerImageContainer{ position: relative; background-color: #fff; width: 250px; height: 250px; margin: 0 auto; }
#imageContainer{ padding: 10px; }
#loading{ position: absolute; top: 40%; left: 0%; height: 25%; width: 100%; text-align: center; line-height: 0; }
#hoverNav{ position: absolute; top: 0; left: 0; height: 100%; width: 100%; z-index: 10; }
#imageContainer>#hoverNav{ left: 0;}
#hoverNav a{ outline: none;}
#prevLink, #nextLink{ width: 49%; height: 100%; background-image: url(data:image2/gif;base64,AAAA); /* Trick IE into showing hover */ display: block; }
#prevLink { left: 0; float: left;}
#nextLink { right: 0; float: right;}
#prevLink:hover, #prevLink:visited:hover { background: url(../images2/prevlabel.gif) left 15% no-repeat; }
#nextLink:hover, #nextLink:visited:hover { background: url(../images2/nextlabel.gif) right 15% no-repeat; }
#imageDataContainer{ font: 10px Verdana, Helvetica, sans-serif; background-color: #fff; margin: 0 auto; line-height: 1.4em; overflow: auto; width: 100% ; }
#imageData{ padding:0 10px; color: #666; }
#imageData #imageDetails{ width: 70%; float: left; text-align: left; }
#imageData #caption{ font-weight: bold; }
#imageData #numberDisplay{ display: block; clear: left; padding-bottom: 1.0em; }
#imageData #bottomNavClose{ width: 66px; float: right; padding-bottom: 0.7em; outline: none;}
#overlay{ position: absolute; top: 0; left: 0; z-index: 90; width: 100%; height: 500px; background-color: #000; }
JS:
// -----------------------------------------------------------------------------------
//
// Lightbox v2.04
// by Lokesh Dhakar - http://www.lokeshdhakar.com
// Last Modification: 2/9/08
//
// For more information, visit:
// http://lokeshdhakar.com/projects/lightbox2/
//
// Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
// - Free for use in both personal and commercial projects
// - Attribution requires leaving author name, author link, and the license info intact.
//
// Thanks: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
// Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of proto-aculous.
//
// -----------------------------------------------------------------------------------
/*
Table of Contents
-----------------
Configuration
Lightbox Class Declaration
- initialize()
- updateImageList()
- start()
- changeImage()
- resizeImageContainer()
- showImage()
- updateDetails()
- updateNav()
- enableKeyboardNav()
- disableKeyboardNav()
- keyboardAction()
- preloadNeighborImages()
- end()
Function Calls
- document.observe()
*/
// -----------------------------------------------------------------------------------
//
// Configurationl
//
LightboxOptions = Object.extend({
fileLoadingImage: 'images2/loading.gif',
fileBottomNavCloseImage: 'images2/closelabel.gif',
overlayOpacity: 0.8, // controls transparency of shadow overlay
animate: true, // toggles resizing animations
resizeSpeed: 7, // controls the speed of the image resizing animations (1=slowest and 10=fastest)
borderSize: 10, //if you adjust the padding in the CSS, you will need to update this variable
// When grouping images this is used to write: Image # of #.
// Change it for non-english localization
labelImage: "Image",
labelOf: "of"
}, window.LightboxOptions || {});
// -----------------------------------------------------------------------------------
var Lightbox = Class.create();
Lightbox.prototype = {
imageArray: [],
activeImage: undefined,
// initialize()
// Constructor runs on completion of the DOM loading. Calls updateImageList and then
// the function inserts html at the bottom of the page which is used to display the shadow
// overlay and the image container.
//
initialize: function() {
this.updateImageList();
this.keyboardAction = this.keyboardAction.bindAsEventListener(this);
if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10;
if (LightboxOptions.resizeSpeed < 1) LightboxOptions.resizeSpeed = 1;
this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0;
this.overlayDuration = LightboxOptions.animate ? 0.2 : 0; // shadow fade in/out duration
// When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
// If animations are turned off, it will be hidden as to prevent a flicker of a
// white 250 by 250 box.
var size = (LightboxOptions.animate ? 250 : 1) + 'px';
// Code inserts html at the bottom of the page that looks similar to this:
//
// <div id="overlay"></div>
// <div id="lightbox">
// <div id="outerImageContainer">
// <div id="imageContainer">
// <img id="lightboxImage">
// <div style="" id="hoverNav">
//
//
// </div>
// <div id="loading">
// <a href="#" id="loadingLink">
// <img src="images/loading.gif">
// </a>
// </div>
// </div>
// </div>
// <div id="imageDataContainer">
// <div id="imageData">
// <div id="imageDetails">
// <span id="caption"></span>
// <span id="numberDisplay"></span>
// </div>
// <div id="bottomNav">
// <a href="#" id="bottomNavClose">
// <img src="images/close.gif">
// </a>
// </div>
// </div>
// </div>
// </div>
var objBody = $$('body')[0];
objBody.appendChild(Builder.node('div',{id:'overlay'}));
objBody.appendChild(Builder.node('div',{id:'lightbox'}, [
Builder.node('div',{id:'outerImageContainer'},
Builder.node('div',{id:'imageContainer'}, [
Builder.node('img',{id:'lightboxImage'}),
Builder.node('div',{id:'hoverNav'}, [
Builder.node('a',{id:'prevLink', href: '#' }),
Builder.node('a',{id:'nextLink', href: '#' })
]),
Builder.node('div',{id:'loading'},
Builder.node('a',{id:'loadingLink', href: '#' },
Builder.node('img', {src: LightboxOptions.fileLoadingImage})
)
)
])
),
Builder.node('div', {id:'imageDataContainer'},
Builder.node('div',{id:'imageData'}, [
Builder.node('div',{id:'imageDetails'}, [
Builder.node('span',{id:'caption'}),
Builder.node('span',{id:'numberDisplay'})
]),
Builder.node('div',{id:'bottomNav'},
Builder.node('a',{id:'bottomNavClose', href: '#' },
Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
)
)
])
)
]));
$('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
$('lightbox').hide().observe('click', (function(event) { if (event.element().id == 'lightbox') this.end(); }).bind(this));
$('outerImageContainer').setStyle({ width: size, height: size });
$('prevLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this));
$('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this));
$('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
$('bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
var th = this;
(function(){
var ids =
'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' +
'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';
$w(ids).each(function(id){ th[id] = $(id); });
}).defer();
},
//
// updateImageList()
// Loops through anchor tags looking for 'lightbox' references and applies onclick
// events to appropriate links. You can rerun after dynamically adding images w/ajax.
//
updateImageList: function() {
this.updateImageList = Prototype.emptyFunction;
document.observe('click', (function(event){
var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
if (target) {
event.stop();
this.start(target);
}
}).bind(this));
},
//
// start()
// Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
//
start: function(imageLink) {
$$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });
// stretch overlay to fill page and fade in
var arrayPageSize = this.getPageSize();
$('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' });
new Effect.Appear(this.overlay, { duration: this.overlayDuration, from: 0.0, to: LightboxOptions.overlayOpacity });
this.imageArray = [];
var imageNum = 0;
if ((imageLink.rel == 'lightbox')){
// if image is NOT part of a set, add single image to imageArray
this.imageArray.push([imageLink.href, imageLink.title]);
} else {
// if image is part of a set..
this.imageArray =
$$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').
collect(function(anchor){ return [anchor.href, anchor.title]; }).
uniq();
while (this.imageArray[imageNum][0] != imageLink.href) { imageNum++; }
}
// calculate top and left offset for the lightbox
var arrayPageScroll = document.viewport.getScrollOffsets();
var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
var lightboxLeft = arrayPageScroll[0];
this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();
this.changeImage(imageNum);
},
//
// changeImage()
// Hide most elements and preload image in preparation for resizing image container.
//
changeImage: function(imageNum) {
this.activeImage = imageNum; // update global var
// hide elements during transition
if (LightboxOptions.animate) this.loading.show();
this.lightboxImage.hide();
this.hoverNav.hide();
this.prevLink.hide();
this.nextLink.hide();
// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
this.imageDataContainer.setStyle({opacity: .0001});
this.numberDisplay.hide();
var imgPreloader = new Image();
// once image is preloaded, resize image container
imgPreloader.onload = (function(){
this.lightboxImage.src = this.imageArray[this.activeImage][0];
this.resizeImageContainer(imgPreloader.width, imgPreloader.height);
}).bind(this);
imgPreloader.src = this.imageArray[this.activeImage][0];
},
//
// resizeImageContainer()
//
resizeImageContainer: function(imgWidth, imgHeight) {
// get current width and height
var widthCurrent = this.outerImageContainer.getWidth();
var heightCurrent = this.outerImageContainer.getHeight();
// get new width and height
var widthNew = (imgWidth + LightboxOptions.borderSize * 2);
var heightNew = (imgHeight + LightboxOptions.borderSize * 2);
// scalars based on change from old to new
var xScale = (widthNew / widthCurrent) * 100;
var yScale = (heightNew / heightCurrent) * 100;
// calculate size difference between new and old image, and resize if necessary
var wDiff = widthCurrent - widthNew;
var hDiff = heightCurrent - heightNew;
if (hDiff != 0) new Effect.Scale(this.outerImageContainer, yScale, {scaleX: false, duration: this.resizeDuration, queue: 'front'});
if (wDiff != 0) new Effect.Scale(this.outerImageContainer, xScale, {scaleY: false, duration: this.resizeDuration, delay: this.resizeDuration});
// if new and old image are same size and no scaling transition is necessary,
// do a quick pause to prevent image flicker.
var timeout = 0;
if ((hDiff == 0) && (wDiff == 0)){
timeout = 100;
if (Prototype.Browser.IE) timeout = 250;
}
(function(){
this.prevLink.setStyle({ height: imgHeight + 'px' });
this.nextLink.setStyle({ height: imgHeight + 'px' });
this.imageDataContainer.setStyle({ width: widthNew + 'px' });
this.showImage();
}).bind(this).delay(timeout / 1000);
},
//
// showImage()
// Display image and begin preloading neighbors.
//
showImage: function(){
this.loading.hide();
new Effect.Appear(this.lightboxImage, {
duration: this.resizeDuration,
queue: 'end',
afterFinish: (function(){ this.updateDetails(); }).bind(this)
});
this.preloadNeighborImages();
},
//
// updateDetails()
// Display caption, image number, and bottom nav.
//
updateDetails: function() {
// if caption is not null
if (this.imageArray[this.activeImage][1] != ""){
this.caption.update(this.imageArray[this.activeImage][1]).show();
}
// if image is part of set display 'Image x of x'
if (this.imageArray.length > 1){
this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + ' ' + this.imageArray.length).show();
}
new Effect.Parallel(
[
new Effect.SlideDown(this.imageDataContainer, { sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0 }),
new Effect.Appear(this.imageDataContainer, { sync: true, duration: this.resizeDuration })
],
{
duration: this.resizeDuration,
afterFinish: (function() {
// update overlay size and update nav
var arrayPageSize = this.getPageSize();
this.overlay.setStyle({ height: arrayPageSize[1] + 'px' });
this.updateNav();
}).bind(this)
}
);
},
//
// updateNav()
// Display appropriate previous and next hover navigation.
//
updateNav: function() {
this.hoverNav.show();
// if not first image in set, display prev image button
if (this.activeImage > 0) this.prevLink.show();
// if not last image in set, display next image button
if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();
this.enableKeyboardNav();
},
//
// enableKeyboardNav()
//
enableKeyboardNav: function() {
document.observe('keydown', this.keyboardAction);
},
//
// disableKeyboardNav()
//
disableKeyboardNav: function() {
document.stopObserving('keydown', this.keyboardAction);
},
//
// keyboardAction()
//
keyboardAction: function(event) {
var keycode = event.keyCode;
var escapeKey;
if (event.DOM_VK_ESCAPE) { // mozilla
escapeKey = event.DOM_VK_ESCAPE;
} else { // ie
escapeKey = 27;
}
var key = String.fromCharCode(keycode).toLowerCase();
if (key.match(/x|o|c/) || (keycode == escapeKey)){ // close lightbox
this.end();
} else if ((key == 'p') || (keycode == 37)){ // display previous image
if (this.activeImage != 0){
this.disableKeyboardNav();
this.changeImage(this.activeImage - 1);
}
} else if ((key == 'n') || (keycode == 39)){ // display next image
if (this.activeImage != (this.imageArray.length - 1)){
this.disableKeyboardNav();
this.changeImage(this.activeImage + 1);
}
}
},
//
// preloadNeighborImages()
// Preload previous and next images.
//
preloadNeighborImages: function(){
var preloadNextImage, preloadPrevImage;
if (this.imageArray.length > this.activeImage + 1){
preloadNextImage = new Image();
preloadNextImage.src = this.imageArray[this.activeImage + 1][0];
}
if (this.activeImage > 0){
preloadPrevImage = new Image();
preloadPrevImage.src = this.imageArray[this.activeImage - 1][0];
}
},
//
// end()
//
end: function() {
this.disableKeyboardNav();
this.lightbox.hide();
new Effect.Fade(this.overlay, { duration: this.overlayDuration });
$$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
},
//
// getPageSize()
//
getPageSize: function() {
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {
xScroll = window.innerWidth + window.scrollMaxX;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if (self.innerHeight) { // all except Explorer
if(document.documentElement.clientWidth){
windowWidth = document.documentElement.clientWidth;
} else {
windowWidth = self.innerWidth;
}
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) { // other Explorers
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
// for small pages with total height less then height of the viewport
if(yScroll < windowHeight){
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
// for small pages with total width less then width of the viewport
if(xScroll < windowWidth){
pageWidth = xScroll;
} else {
pageWidth = windowWidth;
}
return [pageWidth,pageHeight];
}
}
document.observe('dom:loaded', function () { new Lightbox(); });

Here's a class that'll allow you to do just that:
class ScrollLock {
constructor () {
this.pageBody = document.querySelector('body');
this.scrollY = 0;
}
saveScrollY = (num) => {
this.scrollY = num;
}
setScrollY = (num) => {
window.scroll(0, num);
}
setScrollOffset = (vOffset) => {
this.pageBody.style.top = `-${vOffset}px`;
}
freezeBodyScroll = () => {
this.saveScrollY(window.scrollY);
this.setScrollOffset(this.scrollY);
this.pageBody.classList.add('is-fixed');
}
unfreezeBodyScroll = () => {
this.pageBody.classList.remove('is-fixed');
// Don't reset scroll position if lock hasn't occurred
if (this.scrollY === 0) return;
this.setScrollOffset(0);
this.setScrollY(this.scrollY);
this.saveScrollY(0);
}
}
Include the following style declaration:
// In your CSS
body.is-fixed {
position: fixed;
max-width: 100%;
}
Use:
const { freezeBodyScroll, unfreezeBodyScroll } = new ScrollLock();
// Call when you open your modal
freezeBodyScroll();
// Call when you close your modal
unfreezeBodyScroll();

Match parent to absolute children? (responsive Carousel)

Have worked out a solution, see the bottom!
I'm experimenting with a responsive carousel (fluid). I have elements stacked on top of each other so that the width can be fluid depending on the width of the parent. The issue is I need the parent to have overflow hidden which is not possible with children that are absolute positioned.
Tip on cleaning up the JS are appreciated too!
Does anyone have any ideas how to improve this or alternatives? Heres the fiddle: http://jsfiddle.net/j35fy/5/
.carousel-wrap {
position: relative;
}
.carousel-item {
position: absolute;
top: 0;
}
$.fn.mwCarousel = function(options) {
//Default settings.
var settings = $.extend({
changeWait: 3000,
changeSpeed: 800,
reveal: false,
slide: true,
autoRotate: true
}, options );
var CHANGE_WAIT = settings.changeWait;
var CHANGE_SPEED = settings.changeSpeed;
var REVEAL = settings.reveal;
var SLIDE = settings.slide;
var AUTO_ROTATE = settings.autoRotate;
var $carouselWrap = $(this);
var SLIDE_COUNT = $carouselWrap.find('.carousel-item').length;
var rotateTimeout;
if (AUTO_ROTATE) {
rotateTimeout = setTimeout(function(){
rotateCarousel(SLIDE_COUNT-1);
}, CHANGE_WAIT);
}
function rotateCarousel(slide) {
if (slide === 0) {
slide = SLIDE_COUNT-1;
rotateTimeout = setTimeout(function(){
$('.carousel-item').css('margin', 0);
$('.carousel-item').show();
}, CHANGE_WAIT);
if (REVEAL) {
$($carouselWrap.find('.carousel-item')[slide]).slideToggle(CHANGE_SPEED);
} else if (SLIDE) {
var carouselItem = $($carouselWrap.find('.carousel-item')[slide]);
carouselItem.show();
var itemWidth = carouselItem.width();
carouselItem.animate({margin: 0}, CHANGE_SPEED);
} else {
$($carouselWrap.find('.carousel-item')[slide]).fadeIn(CHANGE_SPEED);
}
slide = slide+1;
} else {
if (REVEAL) {
$($carouselWrap.find('.carousel-item')[slide]).slideToggle(CHANGE_SPEED);
} else if (SLIDE) {
var carouselItem = $($carouselWrap.find('.carousel-item')[slide]);
var itemWidth = carouselItem.width();
carouselItem.animate({marginLeft: -itemWidth, marginRight: itemWidth}, CHANGE_SPEED);
} else {
$($carouselWrap.find('.carousel-item')[slide]).fadeOut(CHANGE_SPEED);
}
}
rotateTimeout = setTimeout(function(){
rotateCarousel(slide-1);
}, CHANGE_WAIT);
}
}
$('.carousel-wrap').mwCarousel();
Solution
The first slide actually never moves (last one visible) so that one is set to position: static and all works nicely.

I think by just changing your CSS you're actually there:
.carousel-wrap {
position: relative;
overflow:hidden;
height:80%;
width:90%;
}
Demo: http://jsfiddle.net/robschmuecker/j35fy/2/

Discovered the solution is in fact simple, as the first slide in the DOM (the last you see) never actually moves itself I can set that one slide to be position: static and thus the carousel wrap will set it's height accordingly.
http://jsfiddle.net/j35fy/7/
.container {
background: aliceblue;
padding: 3em;
}
.carousel-wrap {
position: relative;
overflow:hidden;
}
.carousel-item:first-child {
position:static;
}
.carousel-item {
position: absolute;
top: 0;
width: 100%;
}
img {
width: 100%;
}

Losing hover when animating with jQuery (without moving mouse)

I have this row of thumbnails that I am animating with jQuery.
Each of these thumbnails has a hover and active class.
They work fine but when I animate the list, the new thumbnail under the mousecursor does not apply the hover? I have to move the mouse a little bit after each click?
It's kinda difficult to exaplain.. I have made a fiddle here: http://jsfiddle.net/nZGYA/
When you start clicking after thumb 3 without moving the mouse you see what I mean...
It works fine in FireFox, NOT Safari, Chrome, IE etc.
Is there something I can do about this?
For reference here is my code:
<style type="text/css">
.container { position: relative; overflow: hidden; width: 140px; height: 460px; float: left; margin-right: 100px; background: silver; }
ul { position: absolute; top: 10; list-style: none; margin: 10px; padding: 0; }
li { margin-bottom: 10px; width: 120px; height: 80px; background: gray; }
#list-2 li a { display: block; width: 120px; height: 80px; outline: none; }
#list-2 li a:hover { background: teal; }
#list-2 li a.active { background: navy; }
</style>
$(document).ready(function() {
var idx_2 = 0;
$('#list-2 li a')
.click(function() {
$('#list-2 > li a').removeClass('active');
$(this).addClass('active');
var id = $('#list-2 li a.active').data('index') - 2;
idy = Math.max(0, id * 90);
$(this).parent().parent().animate({ 'top' : -idy + 'px' });
return false;
})
.each(function() {
$(this).data('index', idx_2);
++idx_2;
});
});
<div class="container">
<ul id="list-2">
<li><a class="active" href="#"></a></li>
<li></li><li></li><li></li><li></li>
<li></li><li></li><li></li><li></li>
<li></li><li></li><li></li><li></li>
<li></li><li></li><li></li><li></li>
<li></li><li></li><li></li><li></li>
<li></li><li></li><li></li><li></li>
</ul>
</div>

I only worked on the top list but I think I got it all working. let me know if it is what you are looking for.
Here is the fiddler
var idx = 0;
$('#list-1 li').hover(function() {
$(this).addClass('hover');
}, function() {
$(this).removeClass('hover');
}).click
(function() {
var currentindex = $('.active').index();
var selectedindex = $(this).index();
var nexthoverindex = selectedindex + (selectedindex - currentindex);
//counter for starting on index 1
if(currentindex === 1 && selectedindex > 2){
nexthoverindex = nexthoverindex - 1;
}
//counter for starting on index 0
if(currentindex === 0 && selectedindex > 2){
nexthoverindex = nexthoverindex - 2;
}
//make sure the selection never goes below 0
if(nexthoverindex < 0){
nexthoverindex = 0;
}
$('#list-1 > li').removeClass('active');
$(this).addClass('active');
var id = $('#list-1 li.active').data('index') - 2; // take scroll param and subtract 2 to keep selected image in the middle
idy = Math.max(0, id * 90);
$(this).parent().animate({
'top': -idy + 'px'
},200, function(){
$('.hover').removeClass('hover');
if(currentindex > 2 || selectedindex > 2){
$('#list-1 > li').eq(nexthoverindex).addClass('hover');
}
});
return false;
}).css('cursor', 'pointer').each(function() {
$(this).data('index', idx);
++idx;
});

I've got a solution that works in Chrome and IE (haven't tested in Safari). Basically I trigger the mouseover() event of the element under the mouse in the animate() callback event if the thumbnails have moved. The solution is only implemented for list-1.
// list 1
var idx = 0;
$('#list-1 li').hover(function() {
$(this).addClass('hover');
}, function() {
$(this).removeClass('hover');
}).click(function() {
$('#list-1 > li').removeClass('active');
var $active = $(this);
$active.addClass('active');
var id = $('#list-1 li.active').data('index') - 2; // take scroll param and subtract 2 to keep selected image in the middle
var moveAmount = 90;
idy = Math.max(0, id * moveAmount);
var oldPos = $active.parent().position().top;
$active.parent().animate({
'top': -idy + 'px'
}, function(){
var newPos = $(this).position().top;
// Check if we moved
if(oldPos - newPos != 0)
{
var movement = (oldPos - newPos) / moveAmount;
$($(this).children()[$active.index() + movement])
.trigger("mouseover");
}
});
return false;
}).css('cursor', 'pointer').each(function() {
$(this).data('index', idx);
++idx;
});
And here's the link to my fork in jsfiddle if you wan't to test it out over there - http://jsfiddle.net/jimmysv/3tzAt/15/

Develop Reference

JavaScript is the programming language of the Web.

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Match parent to absolute children? (responsive Carousel)

Losing hover when animating with jQuery (without moving mouse)

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