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How to turn off hover effect after certain amount of time?

I have a hover effect where when the icon image is hovered over, an larger image appears (for clarity). I want this larger image effect to end after three seconds AND still have the hover ability. If the image is moved off of, then came back to; I want the larger image to load for another three seconds. Every time the image is hovered over, the effect would last three seconds.
I have tried CSS animations, transitions, setTimeout and none of them are working like I need. Any help is appreciated. I have a LOT of code on this project, so I will try to only include the relevant parts. Thanks in advance.
I will have the code added to the question, once i figure out what I am doing wrong.
Code for building levels for hover image
#PlayerMarker1 {
position: absolute;
left:2%;
top: 2%;
z-index: 9;
}
#Player1Final{
position: absolute;
left:2%;
top: 2%;
z-index: 9;
}
/* Elements for Image load on hover*/
.playerMarker img{
margin: 0 5px 5px 0;
}
.playerMarker:hover{
background-color: transparent;
}
.playerMarker:hover img{
border: 1px;
}
.playerMarker span{ /*CSS for enlarged image*/
position: absolute;
padding: 0px;
left: -1000px;
/*background-color: black ;*/
visibility: hidden;
color: black;
text-decoration: none;
}
.playerMarker span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 2px;
}
.playerMarker:hover span{ /*CSS for enlarged image*/
visibility: visible;
top: 0;
left: 100px; /*position where enlarged image should offset horizontally */
z-index: 50;
}
Code for defining the images.
<div id="Player1Test">
<a id="PlayerMarker1" href="#thumb1"><img src="Player Markers/Morty_Icon.png" width="auto" height="auto"/><span><img src="Player Images/Morty_Token.png" /><br /></span></a>
</div>
This script adds the playerMarker classes to the element I need.
/* Script to add class to player marker ID items */
function Player1Function() {
var Player1FinalTest = document.getElementById("PlayerMarker1");
Player1FinalTest.classList.add("playerMarker");
Player1FinalTest.id='Player1Final';
}

Seems like css animations to pulse the image would work fine. Run the code snippet to try.
img {
margin: 25px;
width: 100px;
height: auto;
}
img:hover {
animation: pulse 2s 1;
}
#keyframes pulse {
0% {
transform: scale(1);
box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.7);
}
50% {
transform: scale(1.4);
box-shadow: 0 0 0 10px rgba(0, 0, 0, 0);
}
100% {
transform: scale(1);
box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
}
<h4>Hover the mouse over image<h4>
<img src="https://stackoverflow.design/assets/img/favicons/apple-touch-icon.png">

Yogi has a good answer using an animation that could be adapted to clearly move your element. I wanted to add an answer manipulating the left and top values using delay.
You are essentially moving a hidden image from off screen onto the screen. Though this feels a bit strange to do, as there may be more clear ways of accomplishing this task, you can immediately move the left into view, and delay moving the top out of view.
A different delay is needed for the hover and for the base element, so it returns to the original position immediately and is available for reuse, but delays moving away on hover.
This might keep in spirit of your current project.
If you have any questions, please ask 🚀
.playerMarker {
background-color: lightblue;
--size: 4rem;
height: var(--size);
width: var(--size);
}
.playerMarker span {
position: absolute;
padding: 0px;
top: 0;
left: -1000px;
visibility: hidden;
color: black;
text-decoration: none;
transition: top 0s;
}
.playerMarker span img {
border-width: 0;
padding: 2px;
}
.playerMarker:hover span {
transition: top 0s 2s;
visibility: visible;
top: -1000px;
left: 100px;
z-index: 50;
}
<div class="playerMarker">
<span>
<img src="https://stackoverflow.design/assets/img/favicons/apple-touch-icon.png" />
</span>
</div>

How can I add interactive semantics to a pseudo element with CSS or JavaScript?

I have a small carousel that plays automatically on page load, using HTML, CSS and JavaScript and definitely no jQuery.
To add a pause/play option there is a span with role="checkbox" followed by a label.
The label itself is hidden and has no content. The span has two pseudo elements. On first showing, the pseudo element shows the ⏸ character, controlled by a CSS ::after class. When clicked, the span has the class "is-clicked" added, at which point the ▶ character is displayed, controlled by another ::after class
It is focusable and can be activated with the keyboard by hitting the Enter key, but when I check with Lighthouse, I keep getting the "Focusable elements should have interactive semantics".
Why is this?
Here is the code:
/* detect keyboard users */
function handleFirstTab(e) {
if (e.key === 'Tab') { // the 'I am a keyboard user' key
document.body.classList.add('user-is-tabbing');
window.removeEventListener('keydown', handleFirstTab);
}
}
let checkboxEl = document.getElementById('checkbox');
let labelEl = document.getElementById('checkboxLabel');
labelEl.onclick = function handleLabelClick() {
checkboxEl.focus();
toggleCheckbox();
}
function toggleCheckbox() {
let isChecked = checkboxEl.classList.contains('is-checked');
checkboxEl.classList.toggle('is-checked', !isChecked);
checkboxEl.setAttribute('aria-checked', !isChecked);
}
checkboxEl.onclick = function handleClick() {
toggleCheckbox();
}
checkboxEl.onkeypress = function handleKeyPress(event) {
let isEnterOrSpace = event.keyCode === 32 || event.keyCode === 13;
if(isEnterOrSpace) {
toggleCheckbox();
}
}
.link {
height: auto;
border: 1px solid #000;
margin-bottom: 1rem;
width: 80%;
display: block;
}
#carousel-checkbox {
margin-bottom: 1rem;
height: 50px;
width: 100px;
display: inline-block;
}
#carousel-checkbox input {
display: none;
}
#carousel-checkbox label {
display: inline-block;
vertical-align: middle;
}
#carousel-checkbox #checkbox {
position: relative;
top: 0;
left: 30px;
padding: 0.5rem 1rem;
background: rgba(255,255,255, 0.5);
}
#carousel-checkbox #checkbox:hover {
cursor: pointer;
}
#carousel-checkbox #checkbox:focus {
border: 1px dotted var(--medium-grey);
}
#carousel-checkbox #checkbox::after {
content: "⏸";
font-size: 1.5rem;
color: var(--theme-dark);
}
#carousel-checkbox #checkbox.is-checked::after {
content: "▶";
}
<div class="link">A bit of text with a dummy link to demonstrate the keyboard tabbing navigation. </div>
<div id="carousel-checkbox"><span id="checkbox" tabindex="0" role="checkbox" aria-checked="false" aria-labelledby="checkboxLabel"></span><label id="checkboxLabel"></label></div>
<div class="link">Another link to another dummy link</div>
Why is this? Is it because the pseudo elements don't have a name attribute or something like that?
I have tried a different way, by dropping the pseudo elements and trying to change the span innerHTML depending on whether the class 'is-clicked' exists or not, but although I can get the pause character to display initially, it won't change the innerHTML to the play character when the span is clicked again.

Short Answer
This is a warning rather than an error, it is telling you to check that the item actually is interactive.
Now you have got the interactivity on the element so you can ignore that issue.
Long answer
Why not just use a <input type="checkbox"> and save yourself an awful lot of extra work?
You can hide a checkbox with a visually hidden class.
This then allows you to do the same trick with a pseudo element as the visual representation of the state.
I have made several changes to your example that mean you don't have to worry about capturing keypresses etc. and can just use a click handler so your JS is far simpler.
Notice the trick with the label where I add some visually hidden text within it so the label is still visible (so we can still use psuedo elements!).
I then use #checkbox1 ~ label to access the label with CSS so we can change the state.
The final thing to notice is how I changed the content property slightly. This is because some screen readers will try and read out pseudo elements so I added alt text that was blank. Support isn't great at just over 70%, but it is worth adding for browsers that do support it.
Example
The below hopefully illustrates a way of achieving what you want with a checkbox.
There may be a few errors as I just adapted your code so please do not just copy and paste!
note: a checkbox should not work with Enter, only with Space. If you want it to work with both it should instead be a toggle switch etc. so that would be a completely different pattern.
let checkboxEl = document.getElementById('checkbox1');
let labelEl = document.querySelector('#checkboxLabel');
function toggleCheckbox() {
let isChecked = checkboxEl.classList.contains('is-checked');
checkboxEl.classList.toggle('is-checked', !isChecked);
checkboxEl.setAttribute('aria-checked', !isChecked);
}
checkboxEl.onclick = function handleClick() {
toggleCheckbox();
}
.link {
height: auto;
border: 1px solid #000;
margin-bottom: 1rem;
width: 80%;
display: block;
}
#carousel-checkbox {
margin-bottom: 1rem;
height: 50px;
width: 100px;
display: inline-block;
}
.visually-hidden {
border: 0;
padding: 0;
margin: 0;
position: absolute !important;
height: 1px;
width: 1px;
overflow: hidden;
clip: rect(1px 1px 1px 1px); /* IE6, IE7 - a 0 height clip, off to the bottom right of the visible 1px box */
clip: rect(1px, 1px, 1px, 1px); /*maybe deprecated but we need to support legacy browsers */
clip-path: inset(50%); /*modern browsers, clip-path works inwards from each corner*/
white-space: nowrap; /* added line to stop words getting smushed together (as they go onto seperate lines and some screen readers do not understand line feeds as a space */
}
#carousel-checkbox label {
display: inline-block;
vertical-align: middle;
}
#carousel-checkbox #checkbox1 {
position: relative;
top: 0;
left: 30px;
padding: 0.5rem 1rem;
background: rgba(255,255,255, 0.5);
}
#carousel-checkbox #checkbox1 ~label:hover {
cursor: pointer;
}
#carousel-checkbox #checkbox1:focus ~ label {
border: 1px dotted #333;
}
#carousel-checkbox #checkbox1 ~label::after {
content: "⏸" / "";
font-size: 1.5rem;
color: #000;
}
#carousel-checkbox #checkbox1.is-checked ~label::after {
content: "▶" / "";
}
<div class="link">A bit of text with a dummy link to demonstrate the keyboard tabbing navigation. </div>
<div id="carousel-checkbox">
<input type="checkbox" id="checkbox1" class="visually-hidden">
<label for="checkbox1" id="checkboxLabel">
<span class="visually-hidden">Pause animations</span>
</label>
</div>
<div class="link">Another link to another dummy link</div>

In the end, I gave up on using a checkbox, due to the difficulties with iPad/iOS not responding to checkbox events. Whilst it worked in codepen on iOS it wouldn't work on the actual site. So I switched to a button.
Here is the code, which is fully accessible with no 'interactive semantics' warnings, shown with some dummy slides. The animation is based on having only three slides. If you wanted more or less, then the timings would have to be adjusted accordingly. All I need now is to style the pause button.
let element = document.getElementById("pause");
function toggleButton() {
element.classList.toggle("paused");
if (element.innerHTML === "⏸") {
element.innerHTML = "▶";
}
else {
element.innerHTML = "⏸";
}
}
element.onclick = function handleClick() {
toggleButton();
}
#carousel {
height: auto;
max-width: 1040px;
position: relative;
margin: 4rem auto 0;
}
#carousel > * {
animation: 12s autoplay6 infinite linear;
position: absolute;
top: 0;
left: 0;
opacity: 0.0;
}
#carousel .one {
position: relative;
}
.homeSlides {
height: 150px;
width: 400px;
background-color: #ff0000;
}
.homeSlides.two {
background-color: #0fff00;
}
.homeSlides.three {
background-color: #e7e7e7;
}
#keyframes autoplay6 {
0% {opacity: 0.0}
4% {opacity: 1.0}
33.33% {opacity: 1.0}
37.33% {opacity: 0.0}
100% {opacity: 0.0}
}
#carousel > *:nth-child(1) {
animation-delay: 0s;
}
#carousel > *:nth-child(2) {
animation-delay: 4s;
}
#carousel > *:nth-child(3) {
animation-delay: 8s;
}
#carousel-button {
position: relative;
height: 100%;
width: auto;
}
#carousel-button button {
position: absolute;
top: -3.5rem;
right: 5rem;
padding: 0 0.5rem 0.25rem;;
background: #fff;
z-index: 98;
font-size: 2rem;
cursor: pointer;
}
body.user-is-tabbing #carousel-button button:focus {
outline: 1px dotted #333;
}
body:not(.user-is-tabbing) #carousel-button button:focus {
outline: none;
}
#carousel-button button:hover {
cursor: pointer;
}
#carousel-button ~ #carousel * {
animation-play-state: running;
}
#carousel-button button.paused ~ #carousel * {
animation-play-state: paused;
}
<div id="carousel-button"><button id="pause" class="">⏸</button>
<div id="carousel">
<div class="homeSlides one">This is div one</div>
<div class="homeSlides two">This is div two</div>
<div class="homeSlides three">This is div three</div>
</div>
</div>

Removing a transition on a class toggling

Result looked for:
MODE 1: when the window is large (say >465px) the TOC items is displayed to the left of the content page
MODE 2: when the window's width gets smaller than 465px, reduce the width of the TOC item using transition
MODE 3: when the window's width gets greater than 465px, increase the width of the TOC item using a transition
finally, when the window's width < 465px and that the TOC is therefore hidden as a result of the mechanism described above, show some text on top that users can click on. When they click on this text, display the TOC item as an overlay. When you click on this text again, hide the TOC item as an overlay.
How to see the problem I try to get rid of:
increase the window to a large width and then back to small width. See the transitions when you go from one to the other. This is good.
make the window small so that the "Show Table of Content" text shows up. Click on the text. The TOC is displayed as an overlay. This is good. Then click again, to HIDE the TOC as an overlay. The cyan TOC disappears, but a transition is played right after. That's the problem. I want to get rid of this transition.
This behavior doesn't make sense to me, because the media query specifies that when the window < 465px the width of the TOC is 0. So why it is reset to 150px is a mystery to me. But the most important for me is, how do I get rid of this unwanted transition when the TOC as an overlay is removed (when the the 'overlay' class is toggled (off)?
function showMenuAsOverlay(caller) {
var node = document.getElementById("toc");
node.classList.toggle('overlay');
if (node.classList.contains('overlay'))
caller.innerHTML = "Hide Table of Content";
else
caller.innerHTML = "Show Table of Content";
}
.wrapper {
display: flex;
flex-direction: row;
border: 3px solid black;
z-index: -1;
position: relative;
}
.container-left {}
#toc {
border: 1px solid green;
flex: 0 0 auto;
white-space: pre;
z-index: -1;
width: 150px;
background-color: red;
transition: width 1s ease-out;
box-sizing: border-box;
}
.container-right {
display: flex;
border: 1px solid red;
flex 1 1 auto;
max-width: 400px;
background-color: white;
z-index:-1;
box-sizing: border-box;
}
.myicon {
cursor: pointer;
visibility: hidden;
}
#media
screen and (max-width: 465px) {
#toc {
width: 0;
background-color: purple;
transition: width 1s ease-out;
}
#toc.overlay {
z-index: 999;
position: absolute;
left: 0px;
background-color: cyan;
bottom: 0;
top: 0;
width: 150px;
transition: left 1s ease-out;
}
.myicon {
visibility: visible;
}
}
<body>
<div onclick="showMenuAsOverlay(this)" class="myicon" id="myicon">Show Table of Content</div>
<div class="wrapper">
<div class="container-left" id="toc" data-state="0">This is some text in the TOC</div>
<div class="container-right">
This is some content this is some content this is some more content, and this is content again and again.
</div>
</div>
</body>

The transition is happening when <div id="toc"> loses the class overlay.
That means you go from applying this rule:
#toc.overlay {
z-index: 999;
position: absolute;
left: 0px;
background-color: cyan;
bottom: 0;
top: 0;
width: 150px;
transition: left 1s ease-out;
}
to applying this rule:
#toc {
width: 0;
background-color: purple;
transition: width 1s ease-out;
}
This makes it clear why the transition is happening. You're going from width: 150px to width: 0 with this transition applied from #toc: width 1s ease-out;
Also, you've got this applied without a media query:
#toc {
border: 1px solid green;
flex: 0 0 auto;
white-space: pre;
z-index: -1;
width: 150px;
background-color: red;
transition: width 1s ease-out;
box-sizing: border-box;
}
This means the transition applies whatever the screen size. I don't think that's what you want. Put a media query around that block to only apply when you really want it to.

Getting jank on CSS transform

With the following CSS, I am preparing my segment message to slide across the viewport:
.Segment {
position: absolute;
width: 100%;
overflow: hidden;
top: -5px;
top: 0;
outline: 1px solid orange;
}
.Segment__message {
display: inline-block;
margin-top: 15px;
left: 100%;
transform: translateX(0);
position: relative;
padding-left: 10px;
will-change: transform;
font-size: 30px;
}
If I apply the following styles dynamically, I am getting some very slight jank:
var message = document.querySelector(".Segment__message");
message.style = "transition: all 20s linear; transform: translateX(calc(-100vw - 100%))"
It is pretty subtle, but is much more noticeable on the 75" screen this will be displayed on.
Using Chrome's perf tools, I can see some FPS degradation, with it dropping to 8 FPS at one point. Is there anything I can do to smooth this out further?
https://codepen.io/anon/pen/OrOvdP

I removed the position property from the .Segment__message, and positioned it using only transform.
I've also used translate3d, which forces hardware acceleration and has improved animation performance for me in the past.
I don't see jank in Firefox, Chrome, or Safari with the code below.
var link = document.querySelector(".slide");
var message = document.querySelector(".Segment__message");
var styleStr = `transition: all 10s linear; transform: translate3d(-100%, 0, 0)`;
link.onclick = () => {
message.style = styleStr;
}
.Segment {
position: absolute;
width: 100%;
overflow: hidden;
top: 0;
outline: 1px solid orange;
}
.Segment__message {
display: inline-block;
margin-top: 15px;
transform: translate3d(100vw, 0, 0);
padding-left: 10px;
will-change: transform;
font-size: 30px;
}
.Segment__message::after {
content: "/";
color: blue;
display: block;
float: right;
padding-left: 15px;
}
.slide {
display: block;
margin-top: 50px;
}
<div class="Segment">
<div class="Segment__message">I am a message</div>
</div>
<a class="slide" href="#">Slide left</a>

You could do some enhancements to make sure your message will be drawn on a new, separate layer, like:
.Segment {
// ...
perspective: 600px;
z-index:2;
}
.Segment__message {
// ...
z-index:3;
will-change: transform;
transform-style: preserve-3d;
font-size: 30px;
}
But there is one little nasty trick that you can do along with will-change property, if you will apply some really small delay (like 0.1s) your animation will be prerendered before it fires, thus should be smoother:
message.style = "transition: all 10s linear .1s; transform: translateX(calc(-100vw - 100%))"

On first view, it could be the calc() section with vw and %. This mix caused sometimes trouble in my projects, for you get non-integers, which will be rounded automatically by the browser. So I changed the 100% to 100vw in your codepen. The result was a much smoother animation - at least in Chrome.

In addition to using translate3d instead of translateX as pointed out by #sol, I was able to improve the performance by using position: absolute and a fixed width for .Segment__message (plus a fixed height for the .Segment).
On my machine the performance degradation is very minor (even with 6x CPU slowdown) so it was difficult to test accurately, however my guess is that since an item is positioned using position: relative; (or position: static as per #sol's example) then it might cause some style recalculations as the item's (and the adjacent DOM element - in this cause a pseudo element) position shifts within it's parent container.
https://codepen.io/anon/pen/XoZRwr

border-radius + overflow:hidden when animating with jQuery

Check this jsFiddle.
The orange bar is serving as a progress bar where the value under the circle is how high the progress bar should be.
Any idea why the overflow:hidden; is beeing disregarded and how do one solve this problem? Oblviously nothing should go outside the circle.
Also is there a better solution for this?

Modified your fiddle a little bit. Here is the link
Modifications:
Changed .outerContainer css to display:block from display:table and addedmargin-top:30px to p css
Check if this works for you.

position: absolute and overflow: hidden don't appear to be playing nicely with display: table/table-cell. Removing the table stuff you had in there to vertically center the text fixes the problem. In Firefox, at least.

I think it's the browser thing...
This is the CSS3 version...
.progressBar {
display: block;
width: 100%;
height: 0;
position: absolute;
bottom: 0;
left: 0;
background: #ec6730;
transition: height 1s;
}
.innerContainer:hover > .progressBar {
height: 300px;
}
http://jsfiddle.net/ZyhgT/2/
It no longer flashing 'cause browser handle the job (not js loop animation...). But still it shows the edge on animation finish!!! This could be the browser things... Could be a bug...

This is not related to jQuery or any javascript. In fact, if you delete all your javascript and manipulate the height of your .progressBar using css on li:hover, you will notice the bug anyway.
It appears to be a browser issue as reported on: https://code.google.com/p/chromium/issues/detail?id=157218
As a workaround try adding an imperceptible css transform to the mask element:
.outerContainer {
-webkit-transform: rotate(0.000001deg);
}

You just need to change your .outerContainer class and it works just fine!
.outerContainer {
position: relative;
display: block;
height: 96px;
width: 96px;
overflow: hidden;
background: #fff;
border: 2px solid #fff;
-webkit-border-radius: 50px;
border-radius: 50px;
}

Put the level class inside the outerContainer div and style the span inside the level class to be relatively positioned. In the JavaScript, to calculate the level, divide by 10 instead of 100 for the perfect circular hover effect.
Here is a fiddle.
HTML
<div class="outerContainer">
<div class="innerContainer">
<p>Circle 3</p>
<span class="progressBar"></span>
</div>
<div class="level"><span>75</span>
</div>
</div>
CSS
body {
background: blue;
}
#circles {
text-align: center;
margin: 100px 0;
}
li {
display: inline-block;
margin: 0 10px;
position: relative;
}
.outerContainer {
position: relative;
display: block;
height: 96px;
width: 96px;
overflow: hidden;
background: #fff;
border: 2px solid #fff;
-webkit-border-radius: 50px;
border-radius: 50px;
}
.innerContainer {
display: table-cell;
vertical-align: middle;
width: 100%;
margin: 0 auto;
text-align: center;
}
p {
color: #000;
width: 96px;
position: relative;
z-index: 2;
}
.progressBar {
display: block;
width: 100%;
height: 0;
position: absolute;
bottom: 0;
left: 0;
background: #ec6730;
}
.level span{
position:relative;
}
JS
$(function() {
$("#circles li").hover(function(){
var thisElement = $(this);
var level = $(this).find(".level").text();
var elementHeight = $(this).find(".outerContainer").height();
level = (level/10)*elementHeight;
$(thisElement).find(".progressBar").stop().animate({
height: level
}, 300);
}, function() {
var thisElement = $(this);
$(".progressBar").stop().animate({
height: 0
}, 300);
});
});

display: table doesn't work that good with CSS positioning;
you should avoid using that, and find some other way to vertically center your labels.
If your circles have a known height, like your code seems to indicate (height:96px ecc), then just use a fixed top position for an absolutely positioned <p> element:
http://jsfiddle.net/ZyhgT/5/
Note that you don't even need jQuery for this, it is all achievable with just CSS3 (unless you are targeting old browsers)