Show one .png image over another .jpg image - png

I have the following code:
<img style="background: url(./image/data/logo.png) no-repeat top right" src="./image/data/picture.jpg" />
As it is now, it shows the logo.png under the picture.jpg image. How can I make it to be shown above the .jpg image?
Thanks.

You must use 2 images to do that. The img must be with position absolute (The one that you want to be over the other). Don't forget that the container must have position:relative in order to contain the absoluted png.
Here is the example:
http://jsfiddle.net/jNpaH/
The html tags:
<div class="image">
<img src="http://upload.wikimedia.org/wikipedia/commons/7/7a/Basketball.png"
class="png-over" />
<img src="http://upload.wikimedia.org/wikipedia/commons/4/42/Papua_New_Guinea_map.png"
/> </div>
The styles:
.image{position:relative}
.png-over{position:absolute; top:0; left:0}
The problem with that technique is that your code becomes spammed with the image tags.
One way of solving it with jQuery is to find each div container with the class 'images' and prepend to each one the image tag.
Here is the example:
http://jsfiddle.net/jNpaH/2/

According to your code I assume that you prefer to have a short html code. But it is impossible to have an image_tag with a background covering it.
The cleanest way is to use jQuery:
This is the final code:
http://jsfiddle.net/QyMkh/
First put a div that will contain all your images. The div must have a class, the images don't require it necessarily.
<div class="image">
<img src="http://upload.wikimedia.org/wikipedia/commons/4/42/Papua_New_Guinea_map.png" />
<img src="http://upload.wikimedia.org/wikipedia/commons/4/42/Papua_New_Guinea_map.png" />
<img src="http://upload.wikimedia.org/wikipedia/commons/4/42/Papua_New_Guinea_map.png" />
</div>
Then add this jQuery block in the html before the closing </body>:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
// store in a variable the url of the image that will be used as background
var url = 'http://upload.wikimedia.org/wikipedia/commons/7/7a/Basketball.png';
// select every image_tag that is children of the div with the class 'image'
jQuery('.image img').each(function() {
// every child image will be wrapped inside generated divs with a class 'img-wrap'
$(this).wrap('<div class="img-wrap"></div>');
});
// After the images are wrapped, insert the image tag that will work as background, note that instead of using the source I'm using the variable that stores it.
$('<img src="' + url + '" class="logo" />').prependTo('.img-wrap');
</script>
Finally add those style declarations to get the desired effect.
<style type="text/css">
.img-wrap{position:relative}
.img-wrap img.logo{position:absolute; top:0; left:0}
</style>
This code will keep your html documents with no unnecesary markup when you try to edit next time.
An advantage of using an image_tag as a background, is that with css you can resize its width and height. Try adding this new rule of stylesheet:
.img-wrap img.logo { height: 170px; left: 75px; position: absolute; top: 50px; width: 170px}
To end this, if you want more flexibility, for example you don't want the image_tags be container in a div, do this actions: replace this line of the jQuery block:
jQuery('.image img').each(function() {
with this
jQuery('.image').each(function() {
and add a class="image" to each
<img class="image">

Related

How to add webp images as background image of a div with fallback to Jpeg

I want to add a background image to a div in webp format with fallback to jpg.
If it is img tag, we can call it as:
<picture>
<source srcset="image.webp" type="image/webp">
<source srcset="image.jpg" type="image/jpeg">
<img src="image.jpg">
</picture>
And what can we do in case of <div class="carousel-item active" style="background-image: url('images/image.jpeg')">
Thank you for any help!
Here is a my solution...
You load the image with a hidden picture element and fetch with js the loaded image (with fallback to jpg or png). Finally you set the loaded image with jquery as the background of the parent div.
Maybe there is a better solution in the field.
function makeBgImage( img ){
let srcImage;
if ( typeof img.currentSrc === "undefined" ){
//Old browser
srcImage = img.src;
}else{
//Modern browser
srcImage = img.currentSrc;
}
let ref = $(img).parents('div:first');
ref.css('background', 'url(' + srcImage + ')');
if( ref.hasClass('contain') ){
ref.css('background-size', 'contain');
}else{
ref.css('background-size', 'cover');
}
ref.css('background-position', 'center');
ref.css('background-repeat', 'no-repeat');
}
.hidden{display: none;}
.img-container{
width: 100%;
padding-top: 62.5%; /* 8:5 Aspect Ratio */
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="img-container">
<picture class="hidden">
<source srcset="image.webp" type="image/webp">
<img onload="makeBgImage(this)" alt="Image" src="image.png">
</picture>
</div>

Text Popups OnMouseOvers, No WeaselOvers Allowed

Jeopardy: "a gimmick to separate it from other quiz and game shows. Because the prompt is the answer!"
This weaselly question appears to be OK, .. But what a terrible coding (Hole) I've dug for myself in the process.
I have a problem, in that I want to create several sets of:-
-- [ div text popup rollovers ]
-- [ that appear and disappear again ], but only when a mouse goes into, and then out of an <a href link, as in:-
<a href="#"
onmouseover=show('popup1')
onmouseout=hide('popup1')>Help Text One</a>
<br /><br /><br />
<a href="#"
onmouseover=show('popup2')
onmouseout=hide('popup2')>Help Text Two</a>
This weasel is an insidious creature to track down, being as all the other weasels are far too clever by half, and for the life of me I couldn't see what was really happening as the other weasels were running: nor even where the Ron Weaselly code went in my Harried Pottering Code.
This website has helped me so many times in the past, that I wanted to give a [ pop-goes-the-weasel ] back to future generations.
The answer to my rollover weasels is found here, that also has a rider attached:-
"It’s also perfectly fine to ask and answer your own question, as long as you pretend you’re on Jeopardy! — phrase it in the form of a question."
Here's the [ text rollover popup solution ] that I end up with, and this was after a day and a half of mumbling to myself and re-editing on codepen.io, then mumbling some more to get the simple coded weasel to popup on command.
Note: the resulting rollover code doesn't look that impressive, but it works. My issue now is whether it could made to work even better, and be made even simpler without me getting lost in the Triwizard Maze, populated by popping weasels of course.
Not sure if codebase.io examples are allowed here, being as all of the demonstrations I've seen thus far are in (fiddle.)
So I've created a fiddle account for you knowledgeable folks to give it the once over.
** Note: I've also magicked up a rather helpful line of helpful text: that actually gets changed by JS, to then reflect the state of the variables going (on) in the JavaScript section, the (alert) popup kept stopping the code from working.
The weaselly fiddly link is as follows:-
https://jsfiddle.net/terrymcb/4gL0ntvs/
Here's the HTML code, three blind rollover links that correspond to three divs, that are individually nested.
<p>DIV BOX ROLLOVERS</p>
<a href="#"
onmouseover=javascript:show('gcinfo')
onmouseout=javascript:hide('gcinfo')>TEXT-1</a> JS-1
<br /><br /><br />
<a href="#"
onmouseover=javascript:show('ucinfo')
onmouseout=javascript:hide('ucinfo')>TEXT-2</a> JS-2
<br /><br /><br />
<a href="#"
onmouseover=javascript:show('uainfo')
onmouseout=javascript:hide('uainfo')>TEXT-3</a> JS-3
<br /><br />
<p id="tValue"> Show in-out OBJ value. </p>
Here's the DIVS laid out.
<div id="ucinfo"><!-- which is hidden -->
<div class="dialog"><!-- is the common style -->
<p>This is the ucinfo included text.</p>
</div>
</div>
<div id="uainfo"><!-- which is hidden -->
<div class="dialog"><!-- is the common style -->
<p>This is the uainfo included text.</p>
</div>
</div>
<div id="gcinfo"><!-- which is hidden -->
<div class="dialog"><!-- is the common style -->
<p>This is gcinfo included text.</p>
</div>
</div>
The CSS, dialog box followed by three outer classes: (visible & display?) Over kill perhaps.
.dialog {
position: fixed;
top: 50px;
right: 50px;
bottom: 50px;
left: 150px;
z-index: 10;
display: flex;
padding: 1em;
background-color: rgba(0,0,0,.100);
/* opacity: 1; */
pointer-events: pointer;
transition: .25s ease-out;
}
#uainfo {
visibility: hidden;
display: none;
}
#ucinfo {
visibility: hidden;
display: none;
}
#gcinfo {
visibility: hidden;
display: none;
}
The all important JavaScript, note: I've cleaned the variables on every call, it seems to keep the function functioning, but I might well be paranoid at this point where JS is concerned. What I do know for a fact, is that calling the document.getElementById( direct keeps failing with the second call to JS, and I've no idea why! - Which is why the variables disp and vist have been used.
function hide(obj) {
disp0 = '0';
visp0 = '0';
disp0 = document.getElementById(obj);
visp0 = document.getElementById(obj);
disp0.style.display="none";
visp0.style.visibility="hidden";
document.getElementById("tValue").innerText='hide ' + obj;
}
function show(obj) {
disp1 = '0';
visp1 = '0';
disp1 = document.getElementById(obj);
visp1 = document.getElementById(obj);
disp1.style.display="block";
visp1.style.visibility="visible";
document.getElementById("tValue").innerText='show ' + obj;
}
That's all folks ..

html2Canvas - Returned canvas is empty

I am trying to implement html2Canvas v 1.0.0-rc.1 in my Angular 7/Ionic 4 project.
The issue I have is when I try to get the canvas of a simple div, the return canvas is emptied and nothing is appended to my destination div using *.appendChild as per the documentation.
For debugging I console log the return canvas where it looks like this:
<canvas width="0" height="0" style="width: 0px; height: 0px;"></canvas>
Below is my code and console logs. I've tested in Safari 12 and Chrome 74. What am I doing wrong? Thanks in advance
HTML
<ion-content>
<div id="destination">
Destination - Html Canvas to Append to This
</div>
<div id="cover">
Source - Hello World
</div>
</ion-content>
Javascript/Component
printTest(): void {
let element = document.getElementById("cover");
console.log('Source Element', element);
html2canvas(element).then((canvas) =>{
console.log('Console Canvas', canvas)
var destination = document.getElementById('destination');
destination.appendChild(canvas);
});
}
Console Logs

Change border color of required Chosen jQuery select boxes

Simply put, how can you change the border color of a Chosen jQuery select box? I am assuming you can do it with CSS but I can't quite figure out how.
$(".pnChosen").chosen({
search_contains: true
});
<select required class="pnChosen"></select>
I can use this to change the border color of all of them, but I only want to change ones that I mark as required.
.chosen-container{
border: 1px solid red;
}
And I also want to change the background color when they are disabled if that is possible.
You can use chosen's option inherit_select_classes.
Give required class on select element, and set css for this selector .required>chosen-single
$(".pnChosen").chosen({
search_contains: true,
inherit_select_classes: true
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.4.2/chosen.jquery.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.4.2/chosen.css" rel="stylesheet" />
<style>
.required>.chosen-single {
border: 1px solid #EE0000;
}
</style>
<select required class="pnChosen required">
<option>Option 1</option>
<option>Option 2</option>
</select>
Another option is to use the adjacent sibling combinator (+) selector in CSS to achieve the desired styling.
For example:
HTML
<select id="myselect" required="required">
...
</select>
<div id="myselect_chosen" class="chosen-container chosen-container-single">
<a class="chosen-single">
...
</a>
</div>
CSS
select:required + div.chosen-container a { ... }
This would apply the desired style(s) to your div.chosen-container a DOM element immediately following select:required. Just be aware that you may still have to establish CSS priority if you're attempting to override an existing Chosen style so your definitions can supersede any existing chosen styles.
Reference: Adjacent Sibling Combinator

jqZoom change image source

I have a gallery of 5 thumbnails and one larger image. I have jqZoom tied to the large image so when you mouse over it, you can see a zoomed in version.
I'm having trouble when a user clicks an alternate thumbnail. I can get the larger image to change, but the zoomed in image remains the original image. I can't make jqZoom change the zoomed in image to match the thumbnail.
Here is an example of what I'm trying to do. You click on the text and the thumbnail changes, but the larger jqZoom image remains the same. How do I change this so that jqZoom loads the new image in the zoom area?
<script type="text/javascript">
$(function() {
var options = {
zoomWidth: 250,
zoomHeight: 250,
showEffect: 'fadein',
hideEffect: 'fadeout',
fadeinSpeed: 'fast',
fadeoutSpeed: 'fast',
showPreload: true,
title: false,
xOffset: 100
};
$(".jqzoom").jqzoom(options);
});
function changeImgSrc() {
document.getElementById('bigImage').src = '4.jpg';
document.getElementById('smallImage').src = '3.jpg';
var options = {
zoomWidth: 400,
zoomHeight: 400,
showEffect: 'fadein',
hideEffect: 'fadeout',
fadeinSpeed: 'fast',
fadeoutSpeed: 'fast',
showPreload: true,
title: false,
xOffset: 100,
containerImgSmall: '3.jpg',
containerImgLarge: '4.jpg'
};
$(".jqzoom").jqzoom(options);
}
</script>
</head>
<body>
<div id="content" style="margin-top:100px;margin-left:100px;">
<a id="bigImage" href="2.jpg" class="jqzoom" style="" title="Product Zoom">
<img id="smallImage" src="1.jpg" title="Product Zoom" style="border: 0px none;">
</a></select>
<br>
<div id="img" onClick="document.getElementById('bigImage').src = '4.jpg';changeImgSrc();">click here to change source</div>
</div>
Thanks for your help!!
A simple way is to unbind the jqZoom whenever the image changes and then re-bind it once you've changed the source of your main pic
var jqzoomOptions = {
zoomWidth: 438,
zoomHeight: 390,
title: false
}
$("#mainPic").jqzoom(jqzoomOptions);
/* image thumbs */
$("#productPicThumbs a").click(function(){
// change pic source here
$("#mainPic").unbind();
$("#mainPic").jqzoom(jqzoomOptions);
return false;
});
I had similar problem with your...
I've got important tips from that site, please check it...
http://paul.leafish.co.uk/articles/drupal/quick_and_dirty_jqzoom_with_drupal_ecommerce_and_imagecache
Old but good js plugin.
I have solved this problem with jQuery, changing the jqimg attribute on the picture source:
$("#foto_produto").attr("jqimg", "domain-url.com/sample3.jpg");
On the following :
<img src="domain-url.com/sample1.jpg" class="jqzoom" jqimg="domain-url.com/sample2.jpg" alt="domain-url.com/sample1.jpg">
Finally obtaining:
<img src="domain-url.com/sample1.jpg" class="jqzoom" jqimg="domain-url.com/sample3.jpg" alt="domain-url.com/sample1.jpg">
You can also applies the jQuery "attr" function to change the "src" and "alt" of that div.
This is how you can clean the data from jqzoom:
$('.jqclass').removeData('jqzoom');
Because jqzoom keeps the data in this object:
$(el).data("jqzoom", obj);
Removing the main image and re-appending it should make it work, here is an example
$('a.main_thumb').jqzoom({ title: false });
$("a.thumb").click(function (e) {
e.preventDefault();
var thumbUrl = $(this).attr("href");
var thumbImg = $(this).find("img").attr("data-img");
$(".main_thumb").remove();
$(".current_thumbnail").append("<a href='" + thumbUrl + "' class='main_thumb'><img src='" + thumbImg + "' /></a>");
$('a.main_thumb').jqzoom({ title: false });
});
With the last version of jQZoom you can create galleries (jQZoom can manage it for you).
1.Attach the gallery ID to your main anchor "rel" attribute.
<a href="images/big-1.jpg" class="zoom" rel="gallery-1">
<img src="images/small-1.jpg" />
</a>
2.Manage your thumbnails "class" and "rel" attributes.
The class zoomThumbActive is attached to your thumbnails by jQZoom. By default specify this class to the selected thumbnail (it should be the same image in your main anchor element)
<ul>
<li>
<a class="zoomThumbActive" href="javascript:void(0);" rel="{
gallery: 'gallery-1',
smallimage: 'images/small-1.jpg',
largeimage: 'images/big-1.jpg'
}">
<img src="images/thumbnail-1.jpg">
</a>
</li>
<li>
<a href="javascript:void(0);" rel="{
gallery: 'gallery-1',
smallimage: 'images/small-2.jpg',
largeimage: 'images/big-2.jpg'
}">
<img src="images/thumbnail-2.jpg">
</a>
</li>
<li>
<!-- ... -->
</li>
</ul>
The structure of the thumbnail rel attribute is very important.
The base elements are :
gallery: the ID of the gallery to which it belongs,
smallimage: the path to the small image (loaded when you click on the
thumbnail),
largeimage: the path to the big image.