Develop Reference

JavaScript Image Gallery 2

I don't know if this question has been asked before or not. But...
I have the following JavaScript code in my HTML file:
<img id="imageDisplay">
<script type="text/javascript">
var displayImage = document.querySelector( '#imageDisplay' );
var imageArray = [ 'http://www.joongcho.com/Images/30th-Bday-Party-01.jpg',
'http://www.joongcho.com/Images/30th-Bday-Party-02.jpg',
'http://www.joongcho.com/Images/30th-Bday-Party-03.jpg',
'http://www.joongcho.com/Images/30th-Bday-Party-04.jpg',
'http://www.joongcho.com/Images/30th-Bday-Party-05.jpg',
'http://www.joongcho.com/Images/30th-Bday-Party-06.jpg' ];
var imageCount = 0;
var imageLength = imageArray.length;
displayImage.setAttribute( 'src', imageArray[ imageCount ] );
function nextImage(imageCount) {
}
function previousImage(imageCount) {
}
</script>
I'm trying to put a next Image and a previous Image function for this HTML.
For the next image, if there are more than 1 images and the image is not the last image, then there should be a link that allows a user to click through the array forwards. Also, if the image is the last image in the array, then the link is hidden.
For the previous image, if the image is not the first image of the array, then there should be a link that allows a user click through the array backwards. if the image is the first image, then the previous link should be hidden.
Any help is appreciated.

You have to attach event listeners to buttons or links (I used buttons):
var displayImage = document.getElementById('imageDisplay');
var buttonPrev = document.getElementById('button-prev');
var buttonNext = document.getElementById('button-next');
var imageArray = [ '../Images/30th-Bday-Party-01.jpg',
'../Images/30th-Bday-Party-02.jpg',
'../Images/30th-Bday-Party-03.jpg',
'../Images/30th-Bday-Party-04.jpg',
'../Images/30th-Bday-Party-05.jpg',
'../Images/30th-Bday-Party-06.jpg' ];
var imageCount = 0;
var imageLength = imageArray.length;
function nextImage () {
imageCount++;
if (imageCount >= imageLength - 1) {
buttonNext.style.display = 'none';
imageCount = imageLength - 1;
}
if (imageCount < imageLength) {
displayImage.setAttribute('src', imageArray[imageCount]);
}
if (imageCount > 0) {
buttonPrev.style.display = 'inline';
}
}
function previousImage () {
imageCount--;
if (imageCount <= 0) {
buttonPrev.style.display = 'none';
imageCount = 0;
}
if (imageCount >= 0) {
displayImage.setAttribute('src', imageArray[imageCount]);
}
if (imageCount < imageLength) {
buttonNext.style.display = 'inline';
}
}
displayImage.setAttribute('src', imageArray[imageCount]);
displayImage.textContent = imageCount;
buttonPrev.style.display = 'none';
buttonNext.addEventListener('click', nextImage);
buttonPrev.addEventListener('click', previousImage);
<img id="imageDisplay" />
<button id="button-prev">Back</button>
<button id="button-next">Forward</button>
Of course, you can't look at the images yet.

CSS JS transition in slider

I've a slider in my code, it's need to be transition, but it doesn't work.
Here is the JS code
It's also not working in CSS...
It needs to be transitioning when the image is changing. I need a slow changing of images in my slider.
actually I tried this in js:
document.getElementById("img").style.transition = "5s ease";
Here is HTML
<div class="photo_div">
<img id="img" src="">
</div>
<button onclick="prev()">PREV</button>
<button onclick="next()">NEXT</button>
</div>
Here is JS
var names = ["img1.jpg", "img2.jpg", "img3.jpg"];
var index = 0;
function init() {
document.getElementById("img").src = "photo/" + names[index];
autoSlide();
}
function next() {
index++;
if (index == names.length) {
index = 0;
}
document.getElementById("img").src = "photo/" + names[index];
}
function prev() {
if (index == 0) {
index = names.length
}
index--;
document.getElementById("img").src = "photo/" + names[index];
}
function autoSlide() {
if (index < names.length) {
setInterval(function() {
next();
}, 3000);
}
}

In the next and prev functions fade out the image - and set queuing to true, then change the image, then fade the img tag back in.
You can try the following for next, and something similar for prev:
function next() {
index++;
if (index == names.length) {
index = 0;
}
$('#img').fadeOut("slow", "linear", function(){
document.getElementById("img").src = "photo/" + names[index];
$('#img').fadeIn("slow", "linear");
});
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
If you can't use jQuery, maybe have a look at this.

How to interchange between 2 logos?

I have the following code:
var logo1 = "//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_2x.png";
var logo2 = "//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_hover_2x.png";
var images = new Array (logo1, logo2);
var index = 1;
function rotateImage()
{
$('.logoimage').fadeOut('fast', function()
{
$(this).attr('src', images[index]);
$(this).fadeIn('fast', function()
{
if (index == images.length-1)
{
index = 0;
}
else
{
index++;
}
});
});
}
$(document).ready(function()
{
setInterval (rotateImage, 5000);
});
var images = new Array (logo2);
var index = 1;
function rotateImage()
{
$('.logoimage').fadeOut('fast', function()
{
$(this).attr('src', images[index]);
$(this).fadeIn('fast', function()
{
if (index == images.length-1)
{
index = 0;
}
else
{
index++;
}
});
});
}
$(document).ready(function()
{
setInterval (rotateImage, 5000);
});
Its working well apart from the following bugs:
Image loads even though image already is showing on page.
I have an image onmousehover effect on that image and its causing bad effect.
Is it possible to interchange between the image src and the img onmousehover src?
Thanks
Alex

you can change the src of the img tag using JavaScript as below,
function hover(element) {
element.setAttribute('src', '//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_2x.png');
}
function unhover(element) {
element.setAttribute('src', '//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_hover_2x.png');
}
and the html be
<img id="my-img" src="http://dummyimage.com/100x100/000/fff" onmouseover="hover(this);" onmouseout="unhover(this);" />
After Edit :
If you want to change it on some timeout, You need to put your below code inside window.onload = function() {}
var images = new Array();
images[0] = "logo_1.png";
images[1] = "logo_2.png";
var images = new Array();
for (var i = 0; i < 2; i++) {
images.push("logo_" + i + ".png");
}
var x = 0;
function changeImage() {
document.getElementById('ad').src = images[x];
if (x < 8) {
x += 1;
} else {
x = 0;
}
if (window.addEventListener) {
window.addEventListener('load', changeImg, false);
}
function changeImg() {
var x = 0;
setInterval(function() {
changeImage()
},5000);
}
HTML:
<img id="ad" src="//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_2x.png" />

Use jQuery hover to run code when hovering in or out of an element. Also use setTimeout to run code after a delay.
var logo1 = "//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_2x.png";
var logo2 = "//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_hover_2x.png";
$(function() {
$('.logoimage').hover(function() {
setTimeout(function() {
$('.logoimage').attr('src', logo2);
}, 1000);
}, function() {
setTimeout(function() {
$('.logoimage').attr('src', logo1);
}, 1000);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<img class="logoimage" src="//cdn.shopify.com/s/files/1/0816/3411/t/3/assets/logo_2x.png">

Change the background of a div with jquery easing the process

I was looking for a way to change the background of a div using jQuery and I found this question:
change background image jquery
I made it and it's working. But, there's a way to ease the process? Like an fade-in/out?
Sorry for my english. And thank you for your time.
UPDATE:
.branding{
min-height:530px;
background-image:url(../images/brandings-0.jpg);
background-repeat:no-repeat;
background-position:center;
}
var newBg = [
'site/assets/images/brandings-1.jpg',
'site/assets/images/brandings-2.jpg',
'site/assets/images/brandings-3.jpg'];
var i = 0;
var rotateBg = setInterval(function(){
i++;
if(i > 2)
i=0;
$('.branding').css({backgroundImage : 'url(' + newBg[i] + ')'});
}, 5000);
<div class="branding"></div>

Try the following fiddle I created for you.
http://jsfiddle.net/ujyjcfea/1/
var i = 0;
var newBg = [
'http://lorempixel.com/output/animals-q-c-640-480-2.jpg',
'http://lorempixel.com/output/animals-q-c-640-480-1.jpg',
'http://lorempixel.com/output/animals-q-c-640-480-4.jpg'];
var image = $('.branding');
image.css('background-image', 'url(http://lorempixel.com/output/animals-q-c-640-480-2.jpg)');
setInterval(function () {
image.fadeOut(1000, function () {
image.css('background-image', 'url(' + newBg[i++] + ')');
image.fadeIn(1000);
});
if (i == newBg.length)
i = 0;
}, 5000);
http://www.programming-free.com/2013/12/change-background-image-jquery.html

demo - http://jsfiddle.net/victor_007/RyGKV/643/
var i = 0;
var images = ['http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-5.jpg', 'http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-2.jpg', 'http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-1.jpg'];
var image = $('#slideit');
image.css('background-image', 'url(http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-5.jpg)'); //Initial Background image setup
setInterval(function () {
image.fadeOut(1000, function () {
image.css('background-image', 'url(' + images[i++] + ')');
image.fadeIn(1000);
});
if (i == images.length) i = 0;
}, 5000);

8 image change on mouse hover and return to default when left

i have an 8 img elements in my page -
<img onmouseover="mousehover(this)" onmouseout="defaultImg(this)" src = "images/1_1.jpg" height="96" width="156" style="margin-right:12px;"/>
<img onmouseover="mousehover(this)" onmouseout="defaultImg(this)" src = "images/2_1.jpg" height="96" width="156" style="margin-right:12px;"/>
On hover it should change from 1_1 to 1_2 till 1_8 and then 1_1 again. On mouse out it should show the default pic i.e 1_1. Like this i have 2_1, 3_1 till 8_1.
The javascript function for mousehover is -
function mousehover(x){
for(var i=2; i<9; i++){
x.src = x.src.replace('images/rotator/1_' + i + '.jpg');
}
}
function defaultImg(x){
x.src = x.src.replace("images/rotator/1_1.jpg");
}
Somehow this mouse hover func does not work. And how do i get the defaultImg for all the images on mouse out. I am stuck here. Any ideas?

Try the following.Should work:
var timer;
var i=2;
function mousehover(x){
x.src = 'images/rotator/1_' + i + '.jpg';
i++;
timer = setTimeout(function(){mousehover(x)},2000);
}
function defaultImg(x){
i=2;
clearTimeout(timer);
x.src = "images/rotator/1_1.jpg";
}

You can pass the first number as parameter in the function calls.
<img onmouseover="mousehover(this, 1)" onmouseout="defaultImg(this, 1)" src = "images/1_1.jpg" height="96" width="156" style="margin-right:12px;"/>
<img onmouseover="mousehover(this, 2)" onmouseout="defaultImg(this, 2)" src = "images/2_1.jpg" height="96" width="156" style="margin-right:12px;"/>
And the JavaScript would be:
var interval;
function mousehover(x, y) {
var i = 1;
interval = setInterval(function() {
i++;
if (i > 8) {
clearInterval(interval);
i = 1;
}
x.src = 'images/rotator/' + y + '_' + i + '.jpg';
}, 500);
}
function defaultImg(x, y) {
clearInterval(interval);
x.src = 'images/rotator/' + y + '_1.jpg';
}
For more performance, I would combine all images into one big sprite, and play with the background-position instead of loading a new image each time.

Something in these lines should work:
var element = document.querySelector("#switch");
element.addEventListener('mouseover', function() {
this.src = "http://placehold.it/400x300";
});
element.addEventListener('mouseout', function() {
this.src = "http://placehold.it/200x300";
});
Fiddle

You need something like this:
//TIP: Insert listeners with javascript, NOT html
x.addEventListener('mouseover', function () {
var count = 1,
that = this,
timer;
timer = setInterval(function () {
if (count < 8) {
count++;
} else {
count = 1;
}
that.src = 'images/rotator/1_' + count + '.jpg';
}, 500);
function onMouseOut() {
that.src = 'images/rotator/1_1.jpg';
that.removeEventListener('mouseout', onMouseOut)
}
this.addEventListener('mouseout', onMouseOut);
});