Develop Reference

How to flip two emojis indefinitely using css

I have a text with two emojis 🥳🤪
I want to flip one emogi with another using css.
When the first emogi is shown I want to the second emoji to be hidden. So they kinda indefinitely replacing each other.
I found here a great example how to make text blink
.blink {
animation: blinker 1s step-start infinite;
}
#keyframes blinker {
50% {
opacity: 0;
}
}
<div class="blink">🥳</div>
So how would you show the second emogi while the first one is hidden?

You can use a pseudo-element:
.blink::before {
content: "🥳";
animation: blinker 1s linear infinite alternate;
}
#keyframes blinker {
0% {
content: "🥳";
}
50% {
opacity: 0%;
}
100% {
content: "🤪";
}
}
<div class="blink"></div>

.emoji-cont {
position: relative;
}
.blink, .blink-2 {
position: absolute;
}
.blink {
animation: blinker 1s infinite;
}
.blink-2 {
animation: blinker 1s .5s infinite;
}
#keyframes blinker {
50% {
opacity: 0;
}
}
<div class="emoji-cont">
<div class="blink">🥳</div>
<div class="blink-2">🤪</div>
</div>

CSS3 not working when trigered by Javascript

I'm trying to make an splash loading with CSS/HTML/JS, but am having some problems.
The problem is when trying to make the splash screen disappear with a transition effect, but the transition effect isn't applying.
I am sure my JavaScript is work properly, as it appends the new class not-displayed to the div element.
const splash = document.querySelector('.splash');
console.log(splash);
document.addEventListener('DOMContentLoaded', (e) => {
setTimeout(() => {
splash.classList.add('not-displayed');
}, 2000);
});
.splash {
z-index: 100000;
position: fixed;
height: 100vh;
width: 100%;
display: flex;
align-items: center;
justify-content: center;
background-color: #ffff;
}
//all of these code not working
.splash.not-displayed {
z-index: 20;
opacity: 0;
position: fixed;
height: 100vh;
width: 100%;
background-color: #f06c65;
transition: all 0.5298s ease-out;
-webkit-transition: all 0.5298s ease-out;
-moz-transition: all 0.5298s ease-out;
-o-transition: all 0.5298s ease-out;
}
#keyframes fadein {
to {
opacity: 1;
}
}
.fade-in {
opacity: 0;
animation: fadein 1s ease-in forwards;
}
<div class="splash">
<h1 class="fade-in">
hello
</h1>
</div>

You have two things going on here, a transition and an animation. First I removed a lot of unnecessary CSS code to make things clearer.
Your code is working as expected. When the page loads, the "fadein" animation is triggered by the fade-in class. The text "hello" fades in from opacity 0 to opacity 1 over the course of a second, as expected.
Meanwhile, your Javascript triggers on page load and adds the class not-displayed to the outer div after two seconds. This triggers the transition effect, which after half a second applies a red background to the div as it fades the div out, bringing it back to opacity 0.
I'm not sure what specifically you are trying to achieve here, but you have wired up a successful transition and animation effect.
const splash = document.querySelector('.splash');
console.log(splash);
document.addEventListener('DOMContentLoaded', () => {
setTimeout(() => {
splash.classList.add('not-displayed');
}, 2000);
});
.splash.not-displayed {
opacity: 0;
background-color: #f06c65;
transition: all 0.5298s ease-out;
}
.fade-in {
opacity: 0;
animation: fadein 1s ease-in forwards;
}
#keyframes fadein {
to {
opacity: 1;
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="splash">
<h1 class="fade-in">
hello
</h1>
</div>

In your code
document.addEventListener('DOMContentLoaded', () => {
setTimeout(() => {
splash.classList.add('not-displayed');
}, 2000);
});
you are adding new class to remove the .splash and then add new class not-displayed

Everything is working just fine, except you have given opacity: 0 to the not-displayed class.
const splash = document.querySelector('.splash');
console.log(splash);
document.addEventListener('DOMContentLoaded', (e) => {
setTimeout(() => {
splash.classList.add('not-displayed');
}, 2000);
});
.splash {
z-index: 100000;
position: fixed;
height: 100vh;
width: 100%;
display: flex;
align-items: center;
justify-content: center;
background-color: #ffff;
}
.not-displayed {
z-index: 20;
/* opacity: 0; */
position: fixed;
height: 100vh;
width: 100%;
background-color: #f06c65;
transition: all 0.5298s ease-out;
-webkit-transition: all 0.5298s ease-out;
-moz-transition: all 0.5298s ease-out;
-o-transition: all 0.5298s ease-out;
}
#keyframes fadein {
to {
opacity: 1;
}
}
.fade-in {
opacity: 0;
animation: fadein 1s ease-in forwards;
}
<div class="splash">
<h1 class="fade-in">
hello
</h1>
</div>
Codepen

You should set the transition to .splash not to .splash.not-displayed

When using #keyframes to fade-out with opacity, how do I repeat the animation with the event?

I am making a label pop up for the user, if the user tries to drag and drop an element that has already been dragged.
Problem is, that the animations only happens once, and at the end of the animation, it will have an opacity of 0 forever.
CSS
#keyframes smooth {
0% { opacity: 1;}
100% { opacity: 0;}
}
.o_tip{
position: absolute;
z-index: 999;
display: none;
opacity: 0;
-webkit-animation: smooth 2s ease-in;
-moz-animation: smooth 2s ease-in;
-o-animation: smooth 2s ease-in;
-ms-animation: smooth 2s ease-in;
animation: smooth 2s ease-in;
}
To illustrate my problem, if I 'end' the animation on opacity: 0.2 instead of opacity: 0:
#keyframes smooth {
0% { opacity: 1;}
100% { opacity: 0.2;}
}
... then the label will reappear for each event - but it will not fade out again, which I want to do.

You can put the animation rule in a specific css class rule, and then on clicking add that class again. Just keep these points in mind:
You need to remove the animation class first before adding it again to have any effect.
Even if you follow first point, removing the class and adding it back right then won't have any visual effect. To trigger reflow, you can use this statement: void targetDiv.offsetWidth;.
document.querySelector("#start-animation").onclick = function(e){
var targetDiv = document.querySelector("#mydiv");
targetDiv.className = "";
void targetDiv.offsetWidth; // this triggers UI reflow
targetDiv.classList.add("o_tip");
}//onclick
#keyframes smooth {
0% { opacity: 1;}
100% { opacity: 0;}
}
.o_tip{
z-index: 999;
animation: smooth 2s ease-in forwards;
}
#mydiv{
background-color: yellow;
height: 50px;
width: 100px;
}
#mydiv.o_top{
display: block;
}
<div id="mydiv"></div>
<button id="start-animation">Start animation</button>

CSS hover with mouse in translateXY

Thank you for reading my question
.ab {
position:absolute;left:50%;top:50%
}
.logo_img {
width:100px;
}
.logo_img:hover {
-webkit-animation: hvr 0.5s ease-out 1 0s;
-ms-animation: hvr 0.5s ease-out 1 0s;
animation: hvr 0.5s ease-out 1 0s;
}
#keyframes hvr {
0% { -webkit-transform: translateX(0px);transform: translateX(0px); }
50% { -webkit-transform: translateX(900px);transform: translateX(900px);}
51% { -webkit-transform: translateX(-900px);transform: translateX(-900px);}
100% {-webkit-transform: translateX(0px);transform: translateX(0px);}
}
<div class="ab"><img src="https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png" class="logo_img" /></div>
Problem is when mouse goes on it, and image moves, then mouse is not on image and sometimes hover does not work!
Is there any way to do animation like this hover but if mouse is not on image... it keeps going?
Is it possible to user jQuery hover and add class on hover? And delete that class after animation ends?

You can create a container div for the image, wich always stays in the same place, and put the image inside this div. Then instead of checking, if the mouse is over the image, you can check if it is over the div.
#container {
border: 1px solid black;
}
.logo_img {
width:100px;
margin-left: calc(50% - 50px);
}
#container:hover .logo_img {
-webkit-animation: hvr 0.5s ease-out 1 0s;
-ms-animation: hvr 0.5s ease-out 1 0s;
animation: hvr 0.5s ease-out 1 0s;
}
#keyframes hvr {
0% { -webkit-transform: translateX(0px);transform: translateX(0px); }
50% { -webkit-transform: translateX(900px);transform: translateX(900px);}
51% { -webkit-transform: translateX(-900px);transform: translateX(-900px);}
100% {-webkit-transform: translateX(0px);transform: translateX(0px);}
}
<div id="container">
<img src="https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png" class="logo_img">
</div>

var duration = 500;
$('img').mouseenter(function() {
$(this).addClass('hvr').delay(duration).queue(function() {
$(this).removeClass('hvr');
$(this).dequeue();
});
});
CODEPEN

If you mean to make animation work without hover then add this animation-iteration-count to infinite.
.logo_img {
-webkit-animation: hvr 5s ease-out;
-ms-animation: hvr 5s ease-out;
animation: hvr 5s ease-out infinite;
}
Updated another answer using jQuery,
<img src="https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png"/>
$(document).ready(function(){
$("img").on("mouseenter",function(){
$(this).addClass("logo_img");
});
$("img").on("mouseleave",function(){
$(this).removeClass("logo_img");
});
});

delayed logo fading into website?

Just wondering whats the best way to go about having the logo in top left corner to fade in after about 5 seconds after user has been on page?
Here is the http://jsfiddle.net/elroyz/sjD8X/ with the logo in the corner
body {
background-color:#000;}
i only put this in because it wouldnt let me post without code
i read something about jquery delay but i know next to nothing about it so thought there might be another option
Thanks in advance

$('img').delay(5000).fadeOut(250);
This will fade out the img after 5 seconds. The time in the code is in ms.
Fore more info on this see
api.jquery.com/delay/
api.jquery.com/fadeout/
api.jquery.com/fadein/

try to use this transitions.
http://www.problogdesign.com/coding/get-started-with-css3-transitions-today/
goodluck!

HTML
<img onload="this.style.opacity='1';" src="image path" />
CSS
img {opacity:0;-moz-transition: opacity 2s;-webkit-transition: opacity 2s;-o-transition: opacity 2s;transition: opacity 2s;}

CSS 3 animation. (With vendor prefixes because it is still new and experimental):
#-webkit-keyframes fadein {
0% { opacity: 0; }
100% { opacity: 1; }
}
#-moz-keyframes fadein {
0% { opacity: 0; }
100% { opacity: 1; }
}
#-o-keyframes fadein {
0% { opacity: 0; }
100% { opacity: 1; }
}
#keyframes fadein {
0% { opacity: 0; }
100% { opacity: 1; }
}
#logo {
-webkit-animation: fadein 5s infinite;
-moz-animation: fadein 5s infinite;
-o-animation: fadein 5s infinite;
animation: fadein 5s infinite;
}