How to create a slideshow before showing the page? - javascript

I've been trying to find a way in order to create a slideshow and specify the timing between each picture. Then after the sequence, I want to display/reveal the home page.
I don't really have a lot of JavaScript experience so any help would be appreciated.

There are many ways to do it, here is one simple/basic example:
jQuery.fn.reverse = [].reverse; /* Just a helper */
var slideshowContainer = $('.slideshow');
var slideshowItems = slideshowContainer.find('.item').reverse();
var slideshowItemsTotal = slideshowItems.length;
slideshowItems.each(function(i) {
var thisItem = $(this);
setTimeout(function() {
thisItem.fadeOut(1000, function() {
thisItem.remove();
if( i+1==slideshowItemsTotal ) {
slideshowContainer.remove();
};
});
}, i*5000+4000);
});
* {
margin: 0 none;
box-sizing: border-box;
}
.slideshow {
position: fixed;
z-index: 10;
top: 0;
left: 0;
width: 100vw;
height: 100vh;
}
.slideshow .item {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h1>Page header</h1>
<p>Page content.</p>
<div class="slideshow">
<img class="item" src="http://placehold.it/800x600/00ff00/333" />
<img class="item" src="http://placehold.it/800x600/ff0000/111" />
</div>
Also on JSFiddle.

You should use setTimeout function to put timing between every function. Then change the pictures with functions to make it look like it is a slideshow.
Example: calls the function after 3 seconds to make an alert.
function myFunction() {
setTimeout(function(){ alert("Hello"); }, 3000);
}
You can find millions of examples on google for timing with JS.
Good luck

Related

Adding touchEvents for navigation

I'm building a little site with full page horizontal and vertical scrolling. Check out a codepen demo here. There is a bug with the demo, the 'left' and 'up' buttons don't work how they're supposed to. The 'right' and 'down' buttons work fine. I just threw that together to show you what I'm talking about (excuse my inline styling).
First off, I need to incorporate touchEvents to make the full page scrolling work on mobile devices. If the user swipes left, right, down, or up, the page should move accordingly. I'm still learning the fundamentals of JS and I have no idea where to start with that.
Secondly, I have a few doubts about whether or not I'm using best practices in my JS. For one thing, I repeat myself a lot. For another, I'm pretty sure there's a simpler method for what I'm trying to do. I'd appreciate it if you could take a look at my code and give me some suggestions. Thanks!
You need to modify these two in CSS:
#center.cslide-up {
top: 100vh;
}
#center.cslide-left {
left: 100vw;
}
First one: When the up button is clicked, it will move 100vh down from top position.
Second one: When the left button is clicked, it will move 100vw right from left position.
As far as for mobile phones, I'd suggest try using:
Hammer.js : https://hammerjs.github.io/
Or Refer this answer: https://stackoverflow.com/a/23230280/2474466
And you can reduce the lines of code by cooking up a function and calling it like this: (Make sure to declare panel2 variable globally)
btnL.addEventListener('click', function() {
swiper("left");
});
btnLBack.addEventListener('click', function() {
swiper("left");
});
function swiper(dir){
panelC.classList.toggle('cslide-'+dir);
if(dir=="up") panel2=panelU;
else if(dir=="right") panel2=panelR;
else if(dir=="left") panel2=panelL;
else if(dir=="down") panel2=panelD;
panel2.classList.toggle('slide-'+dir);
}
The function swiper takes a single argument dir which determines in which direction it has to be moved. And you can concatenate the dir with cslide- to move the center container. And use if/else conditions to determine which panel to move and use the same idea for it as well.
And to make it more simpler and a bit efficient, if you're not making use of any other eventlisteners for the buttons or panels and the only aim is to toggle the class around, you can just use inline onClick="swiper('direction');" attribute on the panels and buttons to trigger it only when needed instead of defining the eventlisteners in the script.
var panel2;
var panelC = document.getElementById('center');
var panelU = document.getElementById('up');
var panelR = document.getElementById('right');
var panelD = document.getElementById('down');
var panelL = document.getElementById('left');
var btnU = document.getElementById('btn-up');
var btnR = document.getElementById('btn-right');
var btnD = document.getElementById('btn-down');
var btnL = document.getElementById('btn-left');
var btnUBack = document.getElementById('btn-up-back');
var btnRBack = document.getElementById('btn-right-back');
var btnDBack = document.getElementById('btn-down-back');
var btnLBack = document.getElementById('btn-left-back');
btnU.addEventListener('click', function() {
swiper("up");
});
btnUBack.addEventListener('click', function() {
swiper("up");
});
btnR.addEventListener('click', function() {
swiper("right");
});
btnRBack.addEventListener('click', function() {
swiper("right");
});
btnD.addEventListener('click', function() {
swiper("down");
});
btnDBack.addEventListener('click', function() {
swiper("down");
});
btnL.addEventListener('click', function() {
swiper("left");
});
btnLBack.addEventListener('click', function() {
swiper("left");
});
function swiper(dir){
panelC.classList.toggle('cslide-'+dir);
if(dir=="up") panel2=panelU;
else if(dir=="right") panel2=panelR;
else if(dir=="left") panel2=panelL;
else if(dir=="down") panel2=panelD;
panel2.classList.toggle('slide-'+dir);
}
* {
margin: 0;
padding: 0;
transition: 1.5s ease;
-webkit-transition: 1.5s ease;
overflow: hidden;
background: white;
}
.panel {
width: 100vw;
height: 100vh;
display: block;
position: absolute;
border: 1px solid blue;
}
.btn {
position: absolute;
padding: 16px;
cursor: pointer;
}
#center {
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
}
#center.cslide-up {
top: 100vh;
}
#center.cslide-left {
left: 100vw;
}
#center.cslide-right {
left: -100vw;
}
#center.cslide-down {
top: -100vh;
}
#up {
top: -100vh;
}
#up.slide-up {
top: 0;
}
#right {
right: -100vw;
}
#right.slide-right {
right: 0;
}
#down {
bottom: -100vh;
}
#down.slide-down {
bottom: 0;
}
#left {
left: -100vw
}
#left.slide-left {
left: 0;
}
<div class="panel" id="center">
<div class="btn" id="btn-up" style="text-align: center; width: 100%;">
up
</div>
<div class="btn" id="btn-right" style="right: 0; top: 50%;">
right
</div>
<div class="btn" id="btn-down" style="text-align: center; bottom: 0; width: 100%;">
down
</div>
<div class="btn" id="btn-left" style="top: 50%;">
left
</div>
</div>
<div class="panel" id="up">
<div class="btn" id="btn-up-back" style="bottom: 0; width: 100%; text-align: center;">
back
</div>
</div>
<div class="panel" id="right">
<div class="btn" id="btn-right-back" style="left: 0; top: 50%;">
back
</div>
</div>
<div class="panel" id="down">
<div class="btn" id="btn-down-back" style="top: 0; width: 100%; text-align: center;">
back
</div>
</div>
<div class="panel" id="left">
<div class="btn" id="btn-left-back" style="right: 0; top: 50%;">
back
</div>
</div>

Pictures in a Jquery slideshow are stuttering and showing incorrectly

I have a slideshow of 5 images, every couple seconds. It's supposed to go to the next image, and loop.
What is currently occurring is the first image shows up, then transitions to the next. When the next appears, it flashes back to the first image. Then it goes to the third image as it should in the series, but flashes back to the first image again. This continues all the way through to the fifth image.
But once it cycles through to the first image again (after going through all five) everything works fine from there on. Each image sits for 3 seconds and then moves on, no jumping back to image one or anything.
Here's the code I'm using.
Html:
<div id="slideshow">
<div>
<img src="Images/1.gif">
</div>
<div>
<img src="Images/2.gif">
</div>
<div>
<img src="Images/3.gif">
</div>
<div>
<img src="Images/4.gif">
</div>
<div>
<img src="Images/5.gif">
</div>
</div>
CSS:
#slideshow {
clear: both;
margin: 50px auto;
position: relative;
max-width: 960px;
height: 643px;
padding: 10px;
box-shadow: 0 0 20px rgba(0,0,0,0.4);
}
#slideshow > div {
position: absolute;
top: 10px;
left: 10px;
right: 10px;
bottom: 10px;
}
#slideshow img {
max-width: 100%;
}
JS:
$("#slideshow > div:gt(0)").hide();
setInterval(function() {
$('#slideshow > div:first')
.fadeOut(800)
.next()
.fadeIn(800)
.end()
.appendTo('#slideshow');
}, 3000);
The actual site I'm putting together is here so you can see it in action:
schmelzerwedding.com
Any help to make it not jump back like that would be greatly appreciated. Thank you!
Like I mentioned in my comment I think the use of appendTo() may be the culprit. I also believe it's not the best thing to do performance wise.
Here's a version that simply keeps track of which slide we're on and increases the number.
(function () {
var slideshow = document.getElementById('slideshow');
var slides = slideshow.getElementsByTagName('img');
var currSlide = 0;
var numSlides = slides.length;
// Set first slide to active
slides[currSlide].classList.add('active');
setInterval(function () {
slides[currSlide].classList.remove('active');
currSlide = (currSlide + 1) >= numSlides ? 0 : currSlide + 1;
slides[currSlide].classList.add('active');
}, 2000);
})();
#slideshow {
position: relative;
width: 200px;
height: 200px;
}
#slideshow img {
opacity: 0;
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
transition: opacity .2s ease-out;
}
#slideshow img.active {
opacity: 1;
}
<div id="slideshow">
<img src="http://placehold.it/199x199">
<img src="http://placehold.it/200x200">
<img src="http://placehold.it/201x201">
<img src="http://placehold.it/202x202">
</div>
Edit: If you (for some reason) don't want to use pure JS, here's the same code in jQuery:
(function () {
var slideshow = $('#slideshow');
var slides = slideshow.find('> *');
var currSlide = 0;
var numSlides = slides.length;
slides.eq(currSlide).addClass('active');
setInterval(function () {
slides.eq(currSlide).removeClass('active');
currSlide = (currSlide + 1) >= numSlides ? 0 : currSlide + 1;
slides.eq(currSlide).addClass('active');
}, 200);
})();
Using jQuery:
//Just for demo - takes a few secs to load the images
setTimeout(function(){
$('#ld').hide();
},500);
var cnt = 0;
$("#slideshow > div:gt(0)").hide();
setTimeout(showSlide, 2000);
function showSlide() {
cnt++;
cnt = (cnt>3)?0:cnt;
$("#slideshow > div").fadeOut();
$("#slideshow > div:eq("+cnt+")").fadeIn();
setTimeout(showSlide, 2000);
}
#slideshow {clear:both;margin:50px auto;position:relative;max-width:960px;height:643px;padding:10px;box-shadow:0 0 20px rgba(0, 0, 0, 0.4);}
#slideshow > div {position:absolute;top:10px;left:10px;right:10px;bottom:10px;}
#slideshow img {max-width:100%;}
/* For Demo Only */
#ld{position:absolute;top:10%;left:20%;font-size:5rem;text-shadow:5px;z-index:2;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="slideshow">
<div><img src="http://placekitten.com/550/200"></div>
<div><img src="http://placekitten.com/548/200"></div>
<div><img src="http://placekitten.com/550/202"></div>
<div><img src="http://placekitten.com/548/202"></div>
</div>
<div id="ld">Loading . . . </div>
Boostrap cannot pickup jQuery right away, try changing the order that they are called in the head.

How can I fade in images on page load one after the other?

I have created the following code that on page load adds opacity: 1 to all divs on the page. In doing so all the images are seen on pageload, but I want each to fade in slowly and after one has completely loaded/is visible I want the 2nd image to load exactly the same then followed by the third.
How can I accomplish this via the code below; what needs to be changed/added? Please note it must use pure Javascript; no CSS3 or jQuery as the proprietary framework I'm working in requires pure JS.
var imageOne = document.getElementById('imageOne');
var imageTwo = document.getElementById('imageTwo');
var imageThr = document.getElementById('imageThr');
function fadeIn() {
imageOne.style.opacity = '1';
imageTwo.style.opacity = '1';
imageThr.style.opacity = '1';
}
#imageOne {
background: url('https://thingiverse-production-new.s3.amazonaws.com/renders/16/04/2d/b5/ed/smiley_face_thumb_small.jpg');
background-repeat: no-repeat;
width: 50px;
height: 50px;
margin-right: 20px;
float: left;
opacity: 0;
}
#imageTwo {
background: url('http://www.mpaart.org/wp-content/uploads/2015/07/twitter-logo-round-50x50.png');
background-repeat: no-repeat;
width: 50px;
height: 50px;
margin-right: 20px;
float: left;
opacity: 0;
}
#imageThr {
background: url('http://orig08.deviantart.net/24c1/f/2009/238/d/8/small_50x50__png_clock_pic_by_counter_countdown_ip.png');
background-repeat: no-repeat;
width: 50px;
height: 50px;
float: left;
opacity: 0;
}
<body onload="fadeIn()">
<div id="wrapper">
<div id="imageOne"></div>
<div id="imageTwo"></div>
<div id="imageThr"></div>
</div>
</body>
You can use CSS transitions, which is faster and won't require jQuery.
.fadeIn {
transition: opacity 1.25s;
}
Add the class fadeIn to your image elements, and now it'll fade.
To make it fade one after the other, use JavaScript timers to space out setting opacity to 1. Example:
var elements = [ /* Image elements to fade */ ];
for (var i = 0; i < elements.length; i++) {
setTimeout(function() {
elements[i].style.opacity = 1;
}, 1250 * i);
}
You can use callback function of fadeIn to load other image
function fadeIn() {
$("#imageOne").fadeIn("fast",function(){
$("#imageTwo").fadeIn("fast", function(){
$("#imageThr").fadeIn("fast");
});
});
}
This is what I came up with so far. Unfortunately, I haven't figure how to have them fade in, as the below just makes them appear one after the other. Though it's pure Javascript.
Any suggestions?
var imageOne = document.getElementById('imageOne');
var imageTwo = document.getElementById('imageTwo');
var imageThr = document.getElementById('imageThr');
function fadeIn(element) {
element.style.opacity += 0.9;
if (element.style.opacity < 1) {
setTimeout(function() {
fadeIn(element);
}, 100);
}
}
setTimeout(function() {
fadeIn(document.getElementById("imageOne"));
}, 1000);
setTimeout(function() {
fadeIn(document.getElementById("imageTwo"));
}, 5000);
setTimeout(function() {
fadeIn(document.getElementById("imageThr"));
}, 10000);

Integrate fadeIn/fadeOut to a content switching script

I am creating an image collage/patchwork. I'm using masonry.js to lay out the content how I need, and a script I found on this very site to change the div contents randomly (between two images).
However, I would like a simple way to animate this image switch, but my javascript/jquery knowledge is very limited.
Below is the complete code for my site:
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="jquery.masonry.min.js"></script>
<style>
#container {
width: 350px;
height: 420px;
border: solid 1px #000;
}
.item {
width: 105px;
height: 105px;
margin: 0;
float: left;
}
.item_2 {
width: 245px;
height: 105px;
margin: 0;
float: left;
}
.item_3 {
width: 245px;
height: 210px;
margin: 0;
float: left;
}
</style>
<script type="text/javascript">
var logSwitch =[
"<img src='apps/TRA-100.gif' />",
"<img src='apps/logistics.gif' />",
];
setInterval(function() {
var i = Math.round((Math.random()) * logSwitch.length);
if (i == logSwitch.length) --i;
$("#logistics").html(logSwitch[i]);
}, 5 * 1000);
</script>
</head>
<body>
<div id="container">
<div class="item_3"><img src="apps/auto.gif" /></div>
<div class="item"><div id="logistics"><img src="apps/TRA-100.gif" /></div></div>
<div class="item"><img src="apps/marine.gif" /></div>
<div class="item"><img src="apps/its.gif" /></div>
<div class="item_2"><img src="apps/Entertain.gif" /></div>
<div class="item_2"><img src="apps/meteor.gif" /></div>
<div class="item"><img src="apps/aviation.gif" /></div>
</div>
<script type="text/javascript">
var $container = $('#container');
$container.imagesLoaded(function(){
$container.masonry({
columnWidth : 300
);
});
</script>
</body>
</html>
Can anyone advise we what direction to head in? This fiddle: (http://jsfiddle.net/jWcLz/1/) looks quite simple, but I have no idea how to implement it.
Thanks in advance.
Right now you replace the HTML within #logistics, but nothing is done to make it fade. The way the demo jsfiddle you linked to works is by calling fadeOut() on the parent element and when that's done calling a fadeIn() function on that same element, while also giving it new content.
Here's how you can do the same thing in your code:
Replace...
$("#logistics").html(logSwitch[i]);
...with...
$('#logistics').fadeOut(500, function() {
$(this).html(logSwitch[i]).fadeIn(500);
});
Edit: if you don't want the content to be switched randomly, don't make it random! Instead, set i outside of setInterval() and then just change i within it.
var i = 0;
setInterval(function() {
i++;
if (i == logSwitch.length) {
i = 0;
}
$('#logistics').fadeOut(500, function() {
$(this).html(logSwitch[i]).fadeIn(500);
});
}, 5000);

How to toggle (hide / show) sidebar div using jQuery

I have 2 <div>s with ids A and B. div A has a fixed width, which is taken as a sidebar.
The layout looks like diagram below:
The styling is like below:
html, body {
margin: 0;
padding: 0;
border: 0;
}
#A, #B {
position: absolute;
}
#A {
top: 0px;
width: 200px;
bottom: 0px;
}
#B {
top: 0px;
left: 200px;
right: 0;
bottom: 0px;
}
I have <a id="toggle">toggle</a> which acts as a toggle button. On the toggle button click, the sidebar may hide to the left and div B should stretch to fill the empty space. On second click, the sidebar may reappear to the previous position and div B should shrink back to the previous width.
How can I get this done using jQuery?
$('button').toggle(
function() {
$('#B').css('left', '0')
}, function() {
$('#B').css('left', '200px')
})
Check working example at http://jsfiddle.net/hThGb/1/
You can also see any animated version at http://jsfiddle.net/hThGb/2/
See this fiddle for a preview and check the documentation for jquerys toggle and animate methods.
$('#toggle').toggle(function(){
$('#A').animate({width:0});
$('#B').animate({left:0});
},function(){
$('#A').animate({width:200});
$('#B').animate({left:200});
});
Basically you animate on the properties that sets the layout.
A more advanced version:
$('#toggle').toggle(function(){
$('#A').stop(true).animate({width:0});
$('#B').stop(true).animate({left:0});
},function(){
$('#A').stop(true).animate({width:200});
$('#B').stop(true).animate({left:200});
})
This stops the previous animation, clears animation queue and begins the new animation.
You can visit w3school for the solution on this the link is here and there is another example also available that might surely help,
Take a look
The following will work with new versions of jQuery.
$(window).on('load', function(){
var toggle = false;
$('button').click(function() {
toggle = !toggle;
if(toggle){
$('#B').animate({left: 0});
}
else{
$('#B').animate({left: 200});
}
});
});
Using Javascript
var side = document.querySelector("#side");
var main = document.querySelector("#main");
var togg = document.querySelector("#toogle");
var width = window.innerWidth;
window.document.addEventListener("click", function() {
if (side.clientWidth == 0) {
// alert(side.clientWidth);
side.style.width = "200px";
main.style.marginLeft = "200px";
main.style.width = (width - 200) + "px";
togg.innerHTML = "Min";
} else {
// alert(side.clientWidth);
side.style.width = "0";
main.style.marginLeft = "0";
main.style.width = width + "px";
togg.innerHTML = "Max";
}
}, false);
button {
width: 100px;
position: relative;
display: block;
}
div {
position: absolute;
left: 0;
border: 3px solid #73AD21;
display: inline-block;
transition: 0.5s;
}
#side {
left: 0;
width: 0px;
background-color: red;
}
#main {
width: 100%;
background-color: white;
}
<button id="toogle">Max</button>
<div id="side">Sidebar</div>
<div id="main">Main</div>
$('#toggle').click(function() {
$('#B').toggleClass('extended-panel');
$('#A').toggle(/** specify a time here for an animation */);
});
and in the CSS:
.extended-panel {
left: 0px !important;
}
$(document).ready(function () {
$(".trigger").click(function () {
$("#sidebar").toggle("fast");
$("#sidebar").toggleClass("active");
return false;
});
});
<div>
<a class="trigger" href="#">
<img id="icon-menu" alt='menu' height='50' src="Images/Push Pin.png" width='50' />
</a>
</div>
<div id="sidebar">
</div>
Instead #sidebar give the id of ur div.
This help to hide and show the sidebar, and the content take place of the empty space left by the sidebar.
<div id="A">Sidebar</div>
<div id="B"><button>toggle</button>
Content here: Bla, bla, bla
</div>
//Toggle Hide/Show sidebar slowy
$(document).ready(function(){
$('#B').click(function(e) {
e.preventDefault();
$('#A').toggle('slow');
$('#B').toggleClass('extended-panel');
});
});
html, body {
margin: 0;
padding: 0;
border: 0;
}
#A, #B {
position: absolute;
}
#A {
top: 0px;
width: 200px;
bottom: 0px;
background:orange;
}
#B {
top: 0px;
left: 200px;
right: 0;
bottom: 0px;
background:green;
}
/* makes the content take place of the SIDEBAR
which is empty when is hided */
.extended-panel {
left: 0px !important;
}

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