Develop Reference

select unique items and mark them js

I have multiple images and number that match eachother by class name, each number has its corresponding image so I have multiple pairs, when I select an image or number both need to have the same css class
$('p[class^="pieza"], div[class^="pieza"]').on('click', function(e) {
// remove class to all elements
$('p[class^="pieza"], div[class^="pieza"]').removeClass('shadow');
// add class to all elements having current class....
$('.' + e.target.classList.toString().addClass('shadow');
the code works fine if I click on the number, number and image are selected and have the same css class
but when i click on any image, all of them got the class and its number match doesn't

It does not worth too much finding unique elements.
You can directly use current clicked element class:
$('p[class^="pieza"], div[class^="pieza"]').not(':has(img)').on('click', function(e) {
// remove class to all elements
$('p[class^="pieza"], div[class^="pieza"]').not(':has(img)').removeClass('redColor');
// add class to all elements having current class....
$('.' + e.target.classList.toString()).not(':has(img)').addClass('redColor');
})
.redColor {
background-color: red;;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="pieceRow1">
<p class="pieza18" id="pieza18">18</p>
<p class="pieza17" id="pieza17">17</p>
<p class="pieza16" id="pieza16">16</p>
<p class="pieza15" id="pieza15">15</p>
</div>
<div class="fila1 d-flex justify-content-center">
<div class="pieza18 "><img class="img-responsive" src="../../imagenes/caraDentalVacia.png" alt="">
</div>
<div class="pieza17"><img class="img-responsive" src="../../imagenes/caraDentalVacia.png" alt="">
</div>
<div class="pieza16"><img class="img-responsive" src="../../imagenes/caraDentalVacia.png" alt="">
</div>
<div class="pieza17"><img class="img-responsive" src="../../imagenes/caraDentalVacia.png" alt="">
</div>
</div>

Change the image src for multipe images

Here is my HTML:
<img class="image" src="" />
<img class="image" src="" />
<img class="image" src="" />
<button onclick="changeImages()">Change the images</button>
Here is my JavaScript:
function changeImages() {
document.getElementsByClassName("image").setAttribute("src", "images/image.png");
}
How can I make my code so that when I click the button, all those images change?
Thanks

getElementsByClassName() returns a collection of elements which doesn't have methods for applying attributes. You need to iterate through the collection and apply the attributes you want to each of its items. Something like:
document.getElementsByClassName("image").forEach(function(image) {
image.setAttribute("src", "images/image.png");
});

animate src image change with vanilla js

I'm building a simple html/css/vanilla js component to display images. I have the list of images on the top, and when I click on one of them, it must appear in the main container.
To do that I just change the img element src like this:
document.addEventListener('DOMContentLoaded', (event) => {
var mainImg = document.getElementById("mainImg");
var thumbnailContainer = document.getElementById("thumbnailContainer");
thumbnailContainer.addEventListener("click", (event) => {
var linkClicked = event.target.currentSrc;
mainImg.src = linkClicked;
});
});
Now I would like to add some animation, but I have some trouble with css transition, here's my html:
<div class="container">
<img id="mainImg" src="xxxxx" alt="car 2"/>
<div id="thumbnailContainer" class="thumbnailContainer">
<div class="thumbnail">
<img src="xxxxx" alt="car 2"/>
</div>
<div class="thumbnail">
<img src="xxxxxx" alt="car 2"/>
</div>
<div class="thumbnail">
<img src="xxxxxx" alt="car 2"/>
</div>
<div class="thumbnail">
<img src="xxxxxx" alt="car 2"/>
</div>
</div>
</div>
The thing that is bugging me is that the element that I click to trigger the transition doesn't need to change, but I just change the src property on the main image with JS.
How can I solve this?

Replace an image with another when a different image is hovered on

I am a total noob, so please go easy.
I am trying to replace one image with a second image while hovering on a different element. My problem is that only the first image is being replaced by the link images. I've give each image an ID, I just am not sure how to apply it.
Thank you in advance for any help you can provide!
Here is what I have so far:
Script:
<script>
function changeimage(towhat,url){
if (document.images){
document.images.targetimage.src=towhat.src
gotolink=url
}
}
function warp(){
window.location=gotolink
}
</script>
<script language="JavaScript1.1">
var myimages=new Array()
var gotolink="#"
function preloadimages(){
for (i=0;i<preloadimages.arguments.length;i++){
myimages[i]=new Image()
myimages[i].src=preloadimages.arguments[i]
}
}
preloadimages("http://www.dxmgp.com/group/images/color_si.jpg", "http://www.dxmgp.com/group/images/bw_si.jpg","http://www.dxmgp.com/group/images/color_dxm.jpg", "http://www.dxmgp.com/group/images/bw_dxm.jpg","http://www.dxmgp.com/group/images/color_tsg.jpg", "http://www.dxmgp.com/group/images/bw_tsg.jpg","http://www.dxmgp.com/group/images/color_image.jpg", "http://www.dxmgp.com/group/images/bw_image.jpg")
</script>
HTML:
<div id="wrap">
<div id="upper">
<div class="u-top">
<img src="http://www.dxmgp.com/group/images/bw_si.jpg" name="targetimage" id="si" border="0" />
<img class="picright" src="http://www.dxmgp.com/group/images/bw_dxm.jpg" name="targetimage" id="dxm" border="0" />
</div>
<div class="u-mid">
<img src="http://www.dxmgp.com/group/images/bw_owners.png" />
</div>
<div class="u-low">
<img class="picleft" src="http://www.dxmgp.com/group/images/bw_tsg.jpg" id="tsg" />
<img class="dxmlogo" src="http://www.dxmgp.com/group/images/logo_dxm.png" />
<img class="picright" src="http://www.dxmgp.com/group/images/bw_image.jpg" id="img" />
</div>
</div>
<div id="lower">
<div class="dots"><img src="http://www.dxmgp.com/group/images/topdots.png"></div>
<div class="logos">
<a href="http://www.thescoutguide.com">
<img class="picll" src="http://www.dxmgp.com/group/images/logo_tsg.png"></a>
<img class="picmid" src="http://www.dxmgp.com/group/images/logo_si.png">
<a href="http://www.imagebydxm.com">
<img class="piclr" src="http://www.dxmgp.com/group/images/logo_image.png"></a>
</div>
<div class="dots"><img src="http://www.dxmgp.com/group/images/lowdots.png"></div>
</div>
</div>

How about something like this? Consider you have a div containing image1.png. When you mouse over a hyperlink, you want to replace image1.png with image2.png. Then, when you move your mouse away from the hyperlink, image2.png will once again be replaced with image1.png:
This is your div containing the image:
<div id="image">
<img src="image1.png" />
</div>
This is the hyperlink:
Mouse over to change image
Here are the JavaScript functions that will replace the inner HTML of the div with different images:
<script type="text/javascript">
function mouseOver() {
document.getElementById("image").innerHTML = '<img src="image2.png" />';
}
function mouseOut() {
document.getElementById("image").innerHTML = '<img src="image1.png" />';
}
</script>
Let me know if this is what you are looking for.

Javascript mouseover/mouseout animation working for first iteration only

I created a javascript animation to move a picture to the right when on mouseover and to go back to its resting position when the mouse exits the image. It works flawlessly for the first image but when I try the other iterations the first image moves instead of the one I hover on.
Here is the HTML code:
<div class="sectionJoueur">
<div class="scroller">
<figure id="infos" class="nomPositionCourt A">
<img src="images/infoMathieuD.png">
</figure>
<figure class="img">
<img src="images/md.jpg">
</figure>
</div>
</div>
<div class="sectionJoueur">
<div class="scroller">
<figure id="infos" class="nomPositionCourt B">
<img src="images/infoMathieuD.png">
</figure>
<figure class="img">
<img src="images/md.jpg">
</figure>
</div>
</div>
<div class="sectionJoueur">
<div class="scroller">
<figure id="infos" class="nomPositionCourt C">
<img src="images/infoMathieuD.png">
</figure>
<figure class="img">
<img src="images/md.jpg">
</figure>
</div>
</div>
I'm trying to use the classes names "class="nomPositionCourt A">" the target the specific image being hovered on but it doesn't seem to be working.
Here is the JS code:
function over(){
if ( $("#infos").hasClass("A") ){
$("#infos").stop().animate({"margin-left": +0});
$(".img").mouseleave(out);
}
else if ( $("#infos").hasClass("B") ){
$("#infos").stop().animate({"margin-left": +0});
$(".img").mouseleave(out);
}
}
function out(){
$("#infos").stop().animate({"margin-left": -287});
}

At first glance, it looks like the reason is that both of your images are using the same ID tag (which is bad practice).
This is the code I'm looking at:
figure id="infos"
You are using that same ID tag twice. When your code runs, it's picking up the first "infos" tag it comes to, which is your first image.
Make sure to use unique ID tags and this should help resolve your problem.

You have assigned the id attribute to more than one element which suppose to be unique id="infos" class can be assigned to multiple elements but id should be unique
Try this one by changing the id to class
$(".nomPositionCourt").hover(function(){
if ( $(this).hasClass("A") ){
$(this).stop().animate({"margin-left": +0});
$(".img").mouseleave(out);
}
else if ( $(this).hasClass("B") ){
$(this).stop().animate({"margin-left": +0});
$(".img").mouseleave(out);
}
},function(){
$(this).stop().animate({"margin-left": -287});
})
In $(this) you have the object of current hovered image
Here is the Reference