Develop Reference

CSS Make parent div not fit children size

I have the following HTML :
<div class="AnimationParent">
<canvas id="canvas" width="534" height="554"></canvas>
</div>
I'm setting the size of the canvas item using javascript in order to avoid scale issues in my animation... :
$(window).resize(function() {
RefreshCanvasSize();
SetLayout();
});
function RefreshCanvasSize() {
var ParentWidth, ParentHeight;
ParentWidth = $(".AnimationParent").width();
ParentHeight = $(".AnimationParent").height();
$("#canvas").prop('width', ParentWidth);
$("#canvas").prop('height', ParentHeight);
}
The following code works when I'm expanding a page but not when it's shrinking. The parent div (AnimationParent) doesn't shrink.
here is the CSS for AnimationParent :
width:100%;
overflow:hidden;
can anyone help please ?
Regards,

Seems to be working fine. Can you provide a fiddle explaining the problem?
Obs.: note that as soon as you run it the first time, the canvas has a fixed size, and only resizes once the browser is resized. To make it always fit the parent, you need to call RefreshCanvasSize() on $(document).ready(...) as well.
(I would add this as a comment, but this way I can provide a snippet with the code example)
$(window).resize(function() {
RefreshCanvasSize();
//SetLayout();
});
function RefreshCanvasSize() {
var ParentWidth, ParentHeight;
ParentWidth = $(".AnimationParent").width();
ParentHeight = $(".AnimationParent").height();
$("#canvas").prop('width', ParentWidth);
$("#canvas").prop('height', ParentHeight);
console.log($("#canvas").prop('width'), $("#canvas").prop('height'))
}
canvas {
background: red;
}
.AnimationParent {
background: blue;
width: 100%;
overflow:hidden;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="AnimationParent">
<canvas id="canvas" width="534" height="554"></canvas>
</div>

Sliding image from left to right

I'm facing an issue with sliding an image from left to right.
What do I want: Image should slide from the left side of the screen to the right side.
My code is:
$('image').show("slide", { direction: "right" }, 1200);
But this solution is not working a per the expectations. Image slides from left to right, but not the whole image is loaded and the full image is visible only at the end of the animation.

here you can check:
$('#hello').show('slide', {direction: 'right'}, 1000);
you can also use: toggle
$(".slide-toggle").click(function(){
$(".box").animate({
width: "toggle"
});
or:
$(".slidingDiv").toggle("slide");

you can use animate instead of show as using show will show complete image after the animation
$('#image').animate({right:'0px'},1200)
img{
width: 100px;
height: 100px;
position: absolute
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<img id="image" src="https://yt3.ggpht.com/-v0soe-ievYE/AAAAAAAAAAI/AAAAAAAAAAA/OixOH_h84Po/s900-c-k-no-mo-rj-c0xffffff/photo.jpg"/>

I think your problem is that the animation started before image object was loaded completely to the browser.
You should check out jquery load event: https://api.jquery.com/load-event/
And search for answers for question "jquery image load callback",
e.g.: jQuery or Javascript check if image loaded
In my opinion the best way is create image object with JS, push it to DOM element and start animation, when image will be loaded completely.
In short:
$("<img/>")
.attr("src", "/images/your-image.jpg")
.on('load', function() { startAnimation() })
.appendTo($('#imageContainer'));
var startAnimation = function(){
$('#hello').show('slide', {direction: 'right'}, 1000);
}

$(document).ready(function() {
$("img").animate({
marginLeft: "0px"
}, 2000);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
<div class="frame" style="width: 300px; height:300px; overflow:hidden;">
<img id="image" src="https://www.filterforge.com/more/help/images/size400.jpg" style='margin-left:-300px; height: 100%; width: 100%; '>
</img>
</div>

Add image over text using jquery

I'm trying to add an image over some text that I have. This is similar to retailmenot.com's reveal coupon code. When a user clicks on the image the image is removed and reveals the text underneath while simultaneously linking the user to an external url.
The base layer can be as follows:
<div class="base">
<h3>Some text</h3>
</div>
I want to load an image with the following over it when the text is clicked:
<div class="overlay">
<img src="http://example.com/image.jpg"/>
</div>
The height of the base layer with class "base" is variable, so the image has to be resized to fit it. I have a working example where I place the image and then resize it, but this creates issues when javascript may not be enabled as the image fails to be resized and looks messy. I want the script to fall back to just showing the underlying text if javascript is disabled.
How can I add and automatically resize such an overlay on page load using jquery or javascript?

You can do it like this:
$(document).ready(function () {
//Set overlay position and dimension to same as base
$base = $(".base");
$overlay = $(".overlay");
$overlay.offset($base.offset());
$overlay.height($base.outerHeight());
$overlay.width($base.outerWidth());
$overlay.show();
//Hide overlay on click (show hidden text)
$(".overlay").click(function () {
$(this).fadeOut();
});
});
and with css:
.overlay{
/* Hide overlay if no js */
position: absolute;
display: none;
}
Check it out here: JSFiddle

If you can have the overlay in the base, as such:
<div class="base">
<h3>Some text</h3>
<div class="overlay">
<img src="http://example.com/image.jpg"/>
</div>
</div>
You can css this, no need for javascript:
.base{
position: relateive;
}
.overlay{
position: absolute; /* or fixed if scrollbars involved */
display: none;
left: 0;
right: 0;
top: 0;
bottom: 0;
/* or replace right and bottom with: */
/* width: 100%;
height: 100%; */
}
You can now use javascript to toggle visibility:
$('.overlay').fadeIn();

Let your html page has this following code
<div class="base">
</div>
Don't place any code about your image in html page. And then in your jQuery code.
var img = '<img src="http://example.com/image.jpg"/>';
var txt = 'Some text';
$(document).ready(function(){
$(this).find('.base').html(txt).show();
$(this).find('.base').click(function(){
if($(this).html() == img)
$(this).html(txt).show();
else
$(this).html(img).show();
});
});
This will solve your issue.

Unable to animate width of absolute positioned image

I'm using jQuery 10.4.2 at the moment. I want to smoothly scale up an absolute positioned image. When I use the following code, I get no errors, but the animation does not occur. Instead, the image simply snaps to the full (100%) size.
HTML
<div class="box">
<img class="scaleMe" src="img.gif" />
</div>
CSS
.box { position:relative; height:0; padding-bottom:61.6667%; background-image:url('background.gif'); }
.scaleMe { display:block; position:absolute; bottom:0; left:0; z-index:1; width:50%; }
JS
$('.scaleMe').animate({width:'100%'}, 2000);
What am I doing wrong?
Update:
Here is a jsFiddle that works: http://jsfiddle.net/s_d_p/27DhK/
But here is a live demo that doesn't work.

You don't have a src on your image tag. Try:
<div class="box">
<img class="scaleMe" src="http://placekitten.com/g/200/300" />
</div>
http://jsfiddle.net/GZ8yX/

This is kind of lame, but if I capture the target width first and animate to that pixel value and then replace it with a percentage it works:
var oli = $('.scaleMe');
var toWidth = $('.box').width();
var scaleUP = function() {
oli.animate({width:toWidth}, 2000, function(){
oli.removeAttr("style");
oli.css("width", "100%");
});
}

Rotate images, if last image then hide

I have 3 images that I want to rotate when a button is clicked.
image1, image2, image3.
If the image is at image1, then when clicked it should show image2 (and so on, in order of image1, .., image3).
When I am at image3, it should then hide the image, i.e. don't display it.
I need some help with the javascript function to do this, I already have the code for the button click event.
I am passing the toggle() function the jquery object $('myImageID');
$(document).ready(
function()
{
$('#button1').click( function() { toggleSector( $('#sector1') ) } ;
}
);
function toggleSector(o)
{
// help!
}
<div id="sector1"></div>
<input type="button" id="button1" value="Sector 1" />
Update
I have to somehow find the name of the current background image set to the
<div> where my image is.
Is there a background property to get the image name currently being displayed?

You can get a background-image by accessing it from the .css(name) method:
$("#sector1").css("background-image");
Without managing your list of images in an array or some other fashion, you're going to have to check each background-image to know when it's time to hide your element. This isn't a great way of working, as it doesn't allow you to easily add a new image in the future if you like.
Perhaps something like the following:
function toggle(el) {
var whenToHide = "background3.jpg";
var currBackground = $(el).css("background-image");
/* ...code... */
if (currBackground == whenToHide) {
$(el).remove();
}
}

Do you have to use the background image?
If not, here's a little code sample for what I would do.
<html>
<head>
<style type="text/css">
#imageRotater { list-style-type:none; }
#imageRotater, .imageRotater li { margin:0px auto; padding: 0px; }
#imageRotater img { display:none; }
</style>
<script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.1.min.js"></script>
<script type="text/javascript">
(function($) {
$.fn.rotate = function() {
return this.each(function() {
var list = $(this).is('ul') ? $(this) : $('ul', this);
list.find('img:eq(0)').show();
$('img', list).click(function() {
$(this).hide().closest('li').next().find('img').show();
});
});
};
})(jQuery);
$(document).ready(function() {
$("#imageRotater").rotate();
});
</script>
</head>
<body>
<div id="sector1">
<ul id="imageRotater">
<li><img src="image1.png" alt="" /></li>
<li><img src="image2.png" alt="" /></li>
<li><img src="image3.png" alt="" /></li>
</ul>
</div>
</body>
</html>

Here's a thing that works.
Each overlay is initially hidden with CSS. Each time your button is clicked, all the overlays are hidden, then one is revealed based on some data stored on the button. If the data reaches the max number overlays + 1, none are shown and the data is reset to 0.
Markup
<div id="container" style="background: yellow">
<div class="overlay" style="background: red"></div>
<div class="overlay" style="background: green"></div>
<div class="overlay" style="background: blue"></div>
</div>
Style
div{
width: 100px;
height: 100px;
}
.overlay{
position: absolute;
top: 0;
left: 0;
display: none;
}
#container{
position: relative;
}
Script
$(function() {
var b = $('#button1');
b.data('next', 0);
b.data('max', $('.overlay').size()+1 );
b.click( function( e ) {
var next = $(this).data('next');
var o = $('.overlay');
o.hide();
o.eq(next).show();
next = (next+1) % $(this).data('max');
$(this).data('next', next);
});
});

In response to Bendeway's answer above, you'll need to insert before
list.find('img:eq(0)').show();
the following line:
list.find('img').hide();
This will hide all the images before it starts rotating through them.