So i made a svg logo preloader, made some css animations for it also. But my main problem is how do i make the preloader load different animation on refresh/new page loading using javascript. Like for example on one page loading the logo should use the bounce animation and upon a page refreh or on another tab opening the preloader to use the rotate animation i made, etc.
var strings = [
'animation1.',
'animation2.',
'animation3.'
];
var rand = strings[Math.floor(Math.random() * strings.length)];
document.getElementById('loading-animation').innerHTML = rand;
.loading {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
text-align: center;
background: #ddd;
padding-top: 200px;
}
.svg {
display: block;
width: 80px;
height: 80px;
background: #aaa;
margin: 10px auto;
}
.animation1 {
just an example
}
.animation2 {
just an example
}
.animation2 {
just an example
}
<div id="container" class='loading' >
<div id='loading-animation' class='loading-animation'>Processing</div>
<svg>just an example svg in inserted in the html, no external src link to it</svg>
</div>
I'm pretty sure that .innerHTML shouldn't be there since the javascript file will be external linked in the head section. And i know i haven't linked all of the codes used just because it's to much code to paste here so i made a mini example, hope i can make myself understood. Thanks.
You can use JavaScript to randomly assign a CSS class to the element you want to animate. Here is an example.
var animationClasses = [
'animation1',
'animation2',
'animation3'
];
var choosenAnimation = animationClasses[~~(Math.random() * animationClasses.length)];
document.getElementById('elementToAnimate').classList.add(choosenAnimation);
#keyframes grow {
0% {
transform: scale(0);
}
100% {
transform: scale(1);
}
}
#keyframes fade {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
#keyframes fly-down {
0% {
transform: translateY(-100%);
}
100% {
transform: translateY(0%);
}
}
.animation1 {
width: fit-content;
animation: grow 1s;
}
.animation2 {
animation: fade 1s;
}
.animation3 {
animation: fly-down 1s;
}
<div id="elementToAnimate">This will get a random animation</div>
A random class in the array animationClasses is assigned to elementToAnimate. Each class contains CSS for a different animation, allowing for a random animation each time.
Related
I have the following html code
var feedback = document.getElementById('openNotification');
feedback.addEventListener('click', function (){
a = document.getElementById("notification");
a.style.visibility = "visible";
});
#notification {
position: fixed;
z-index: 101;
bottom: 0;
transform: translateY(calc(100% + 10px));
left: 10vw;
right: 10vw;
text-align: center;
height: 20vh;
overflow: hidden;
background-color: #ededed;
color: #000;
}
#keyframes slideUp {
0% { transform: translateY(calc(100% + 10px)); }
100% { transform: translateY(0); }
}
#notification {
animation: slideUp 2.5s ease forwards;
}
<button id="openNotification">
Open notification
</button>
<!--If I remove the (style="visibility: hidden;") the animation works as expected-->
<div id="notification" style="visibility: hidden;">
121
</div>
The CSS for this div contains "transform" code to make the notification slide up the screen...
When I run the following code in a setTimeout function the notification simply appears on the screen and does not slide up as it should.
a = document.getElementById("notification");
a.style.visibility = "visible";
How do I fix this?
On further testing I can see that the animation code seems to be running from the moment the code is loaded. I assume I need to somehow change this behaviour so the animation code is kicked off by the setTimout function or in this case the button click. Any examples on how to do this?
The animation takes place but as it only lasts a short time, by the time you come to push the button it has finished, and you then make the thing visible.
Instead we remove the animation from the initial state of the element and add it (by adding a class in this case) only when you click the button.
Note: if you want this to be repeatable you will have to include sensing the animationend event and removing the slide class at that point. Otherwise the system will think it's done the animation and needn't do it again.
var feedback = document.getElementById('openNotification');
feedback.addEventListener('click', function (){
a = document.getElementById("notification");
a.style.visibility = "visible";
a.classList.add('slide');
});
#notification {
position: fixed;
z-index: 101;
bottom: 0;
transform: translateY(calc(100% + 10px));
left: 10vw;
right: 10vw;
text-align: center;
height: 20vh;
overflow: hidden;
background-color: #ededed;
color: #000;
}
#keyframes slideUp {
0% { transform: translateY(calc(100% + 10px)); }
100% { transform: translateY(0); }
}
#notification.slide {
animation: slideUp 2.5s ease forwards;
}
<button id="openNotification">
Open notification
</button>
<!--If I remove the (style="visibility: hidden;") the animation works as expected-->
<div id="notification" style="visibility: hidden;">
121
</div>
So far, i've been able to make it such that when the cursor hovers over the div a background image in the body appears. I need to add a fade in animation to this. Ive been looking for solutions here but havent been able to work around it. I don't have any experience in javascript.
enter code here
<script>
changeBgImage = () => {
document.body.style.backgroundImage = "url('../Images/Background/wraithback.jpg')";
console.log("working")
}
ogBgImage = () => {
document.body.style.backgroundImage = "url('../Images/Background/black.jpg')";
console.log("working")
}
</script>
<style>
body {
background-image: url('../Images/Background/black.jpg');
}
</style>
<body>
<div class="gwraith"><a href="../Legends/wraith.html ">
<img src="../Images/Legends_pics/wraithchibi.png" width="130vw" class="wraith"
onmouseover="changeBgImage();" onmouseout="ogBgImage();">
</a>
</body>
Add a transition rule to the body tag. The same can be done in css, without javascript.
function changeBgImage() {
document.body.style.backgroundImage = "url('https://s1.1zoom.ru/big0/284/Summer_Pond_Fence_Trees_496376.jpg')";
}
function ogBgImage() {
document.body.style.backgroundImage = "url('https://pristor.ru/wp-content/uploads/2017/02/leto12.jpg')";
}
body {
background-image: url('https://pristor.ru/wp-content/uploads/2017/02/leto12.jpg');
background-repeat: no-repeat;
background-size: cover;
transition: all 0.7s linear;
}
<body>
<div class="gwraith">
<a href="../Legends/wraith.html">
<img src="https://begin-english.ru/img/word/refresh.jpg" width="130vw" class="wraith"
onmouseover="changeBgImage();" onmouseout="ogBgImage();">
</a>
</div>
</body>
I didn't manage to do it with body. But you can stretch the underlying div and change its opacity.
const appDiv = document.getElementById("app");
appDiv.addEventListener("mouseover", showBodyBackground);
appDiv.addEventListener("mouseout", hideBodyBackground);
function showBodyBackground() {
document.getElementById("bg").classList.add("hidden");
}
function hideBodyBackground() {
document.getElementById("bg").classList.remove("hidden");
}
.visible {
background: url('https://www.bouwendnederland.nl/media/6502/rijnhaven-impressie-602-x-402.jpg');
transition: opacity 1.5s linear;
opacity: 1;
}
.hidden {
opacity: 0;
}
.stretched {
position: absolute;
width: 100%;
height: 100%;
}
#app {
width: 100px;
height:50px;
background: lightblue;
text-align: center;
margin: 0 auto;
position: relative;
}
<body>
<div class="stretched visible" id="bg"></div>
<div id="app">Hover me!</div>
</body>
Be aware, that everything will disappear in the element with opacity: 0. It means, your button and other elements you want to keep on the screen shouldn't be children of that div.
We can't just fade body, or indeed any wrapper div which may replace it, as that would fade everything. We also can't directly fade a background image as CSS doesn't have that ability. But we can put the two background images into the two pseudo elements, before and after, of body and these can then be animated to fade in and out. The code wants to fade in one background on mouseover, and fade it out on mouseout.
There are two background images used, one called black. The code here fades that out as the other image fades in, but that can be easily removed if required.
Mouse over the gear image to fade in the second image, and mouseout of the gear to fade it out.
<!DOCTYPE html>
<html>
<head>
<script>
changeBgImage = () => {
<!--document.body.style.backgroundImage = "url('../Images/Background/wraithback.jpg')";-->
document.body.classList.toggle('showbefore');
document.body.classList.toggle('showafter');
console.log("working")
}
ogBgImage = () => {
<!--document.body.style.backgroundImage = "url('christmas card 2020 front.jpg')";-->
document.body.classList.toggle('showbefore');
document.body.classList.toggle('showafter');
console.log("working")
}
</script>
<style>
body {
position: relative;
height: 100vh; /* I added this just to cover the whole window you may not want it */
}
body:before, body:after {
opacity: 0;
content: ' ';
display: block;
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
z-index: -1;
background-size:cover; /* I added this just to get the background over the whole window - you may or may not want it */
background-repeat: no-repeat no-repeat;
background-position: center center;
animation-duration: 2s; /* change to what you want it to be */
animation-fill-mode: forwards;
}
body:before {
background-image: linear-gradient(black, black); /*change this to url('your background image');*/
animation-name: shown;
}
body:after {
background-image: url('https://ahweb.org.uk/christmas card 2020 front.jpg');
animation-name: unshown;
}
body.showbefore:before, body.showafter:after {
animation-name: show;
}
body.showafter:before, body.showbefore:after {
animation-name: unshow;
}
#keyframes unshown {
from {
opacity: 0;
}
to {
opacity: 0;
}
}
#keyframes shown {
from {
opacity: 1;
}
to {
opacity: 1;
}
}
#keyframes unshow {
from {
opacity: 1;
}
to {
opacity: 0;
}
}
#keyframes show {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
</style>
</head>
<body class="showbefore">
<div class="gwraith"><!--<a href="../Legends/wraith.html ">-->
<!--<img src="../Images/Legends_pics/wraithchibi.png" width="130vw" class="wraith"
onmouseover="changeBgImage();" onmouseout="ogBgImage();">-->
<img src="https://ahweb.org.uk/gear.jpg" width="130vw" class="wraith"
onmouseover="event.preventDefault();event.stopPropagation();changeBgImage();" onmouseout="event.preventDefault();event.stopPropagation();ogBgImage();">
<!--</a>-->
</body>
</body>
</html>
Ok, maybe stackoverflow can help? :)
I'm trying, without any luck, to create a page transition effect with an svg image.
When the user clicks on a link in Page 1, a diamond shaped svg fades in like a portal into Page 2.
The basic idea is to recreate the space travel in the intro of the Alphaville - Forever Young video: https://www.youtube.com/watch?v=t1TcDHrkQYg
:)
Maybe the diamond also fades in from blue to transparent (but that is the next step).
Diamond svg: https://www.onlinewebfonts.com/icon/413
I suggest you use clip-path instead of a svg since animating an svg that big will be really slow and really laggy. You can change the clip path to show what you want. Bennet Feely created a nice generator that helps with this.
For the animation itself you can increase the width and height to fit your screen. Then fill the remainder by animating the Z axes.
Animation looks better in fullscreen then in the smaller preview
const links = document.querySelectorAll(".page-transition");
const overlay = document.querySelector(".overlay__diamond");
for(const link of links) {
link.addEventListener("click", (event) => {
event.preventDefault();
overlay.classList.add("overlay__diamond--animate");
setTimeout(() => window.location.reload(), 1000);
// This one is correct, one above is for the demo
// setTimeout(() => (window.location.href = link.href), 1000); // Same time as animation duration
});
}
.page {
background: green;
/* For demontrational purposes only, just to increase page size */
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
}
.overlay {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
display: flex;
align-items: center;
justify-content: center;
overflow: hidden;
pointer-events: none;
perspective: 500px; /* Needed for translateZ to work */
}
.overlay__diamond {
width: 100%;
height: 100%;
background: blue;
animation: fadeout 1s linear forwards;
}
.overlay__diamond--animate {
animation: zoom 1s linear forwards;
clip-path: polygon(50% 0%, 75% 50%, 50% 100%, 25% 50%);
}
#keyframes fadeout {
0% {
opacity: 1;
}
100% {
opacity: 0;
}
}
#keyframes zoom {
0% {
width: 0;
height: 0;
transform: translateZ(0);
}
100% {
width: 100%;
height: 100%;
transform: translateZ(400px); /* Can't go higher then the perspective */
}
}
<div class="page">
<!-- Replace #link with your actual urls -->
<a class="page-transition" href="#link">Link</a>
<a class="page-transition" href="#link">Link</a>
<a class="page-transition" href="#link">Link</a>
<div class="overlay">
<div class="overlay__diamond"></div>
</div>
</div>
This is an example of a loader animation copied from the w3schools website:
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.loader {
border: 16px solid #f3f3f3;
border-radius: 50%;
border-top: 16px solid #3498db;
width: 120px;
height: 120px;
-webkit-animation: spin 2s linear infinite; /* Safari */
animation: spin 2s linear infinite;
}
/* Safari */
#-webkit-keyframes spin {
0% { -webkit-transform: rotate(0deg); }
100% { -webkit-transform: rotate(360deg); }
}
#keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
</style>
</head>
<body>
<h2>How To Create A Loader</h2>
<div class="loader"></div>
</body>
</html>
I have a similar one on my page with function to hide the loader after seconds of the main page refresh:
setTimeout(function() {
$('#loadingAnimation').addClass('hidden');
}, 1500);
Now my question is:
Is there a way to add the animation elements using JavaScript? I mean, when I inspect the page I can change the CSS of the loader which makes it visible, so how can I add the elements on the page using JavaScript and then remove it to make it unchangeable?
#loadingAnimation{
position: fixed;
max-width: 100%;
max-height: 100%;
top:0;
left:0;
right:0;
bottom:0;
background-color: #ffffff;
opacity: 1;
transition: 0.5s;
visibility: visible;
z-index: 10;
}
#loadingAnimation.hidden{
opacity: 0;
visibility: hidden;
}
I'm new to programming :) I need your help and I hope my question is clear!
There are some things you can do namely:
Add a class into your style that does the animation (Recommended since it requires the least work) and add elements with that class / add the class to elements.
Create a new style element with a unique id (somewhat overly complex for something of this scale)
requestAnimationFrame - Very hard and easy to go wrong - Basically just for reference
Implementation for 1:
CSS:
.loadingAnimation { /* . notates a class whereas # notates an id */
position: fixed;
max-width: 100%;
max-height: 100%;
top:0;
left:0;
right:0;
bottom:0;
background-color: #ffffff;
opacity: 1;
transition: 0.5s;
visibility: visible;
z-index: 10;
}
JS:
const loader = document.createElement("div");// Create a new div element
loader.className = "loadingAnimation"; // Add the loadingAnimation class to it
document.getElementById("root").append(loader); // Add it to an element with id root
setTimeout(function() {
loader.remove(); // Remove the loader
}, 1500);
Instead of applying the hidden class to the loader element you can just simply remove it instead!
setTimeout(function() {
$('#loadingAnimation').remove();
}, 1500);
This will remove it from the DOM and stop people playing with the styling in the dev tools.
I will add though that there's really not a lot you can do to stop people fiddling with websites in their own browsers and it's not that big of an issue.
I have a keyframe animation which plays when I hover on element. After the mouseout event, it stops too abruptly. How could I force it play till it's end? I tried on.(animationend) event, it doesn't work. Transform origin and huge delay, either don't work. Thanks.
CodePen Demo
class Main {
constructor() {
}
waveOn() {
$(this).addClass('wave-active');
}
waveOut() {
var elem = $('.info__block');
elem.removeClass('wave-active');
}
jsInit() {
$('.info__block').hover(this.waveOn);
$('.info__block').on('animationend', this.waveOut)
}
}
new Main().jsInit();
.info__block {
width: 100px;
height: 100px;
background: aqua;
border-radius: 50px;
position: relative;
display: flex;
justify-content: center;
margin-top: 100px;
}
.info__block:before {
content: '';
position: absolute;
width: 100%;
height: 100%;
border-radius: 50px;
border-top: 2px solid aqua;
}
.info__block.wave-active:before {
animation: link-line 2.5s infinite .5s linear;
}
#keyframes link-line {
0% {
transform: translateY(0);
opacity: 1;
}
60% {
opacity: 0;
}
100% {
transform: translateY(-50%) scale(1.6);
opacity: 0;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="info__block info__block-1">
</div>
Here is a solution to your problem using the native animationiteration event that is described in the W3C Spec for animations. This event is fired after every single iteration of the animation. So, what we are doing is that on hover out, we are attaching the animationiteration event listener (which will get fired only once due to the one). Within this event's listener, I've simply placed the contents of original waveOut function. So, everytime you hover the mouse out of the element, the animation will complete one single iteration (after the hover out has happened) and then stop with that. I think this is a lot more graceful than an abrupt end.
class Main {
constructor() {}
jsInit() {
$('.info__block').hover(function() {
$('.info__block').off('animationiteration'); /* switch off the event handler when you quickly hover back in again */
$('.info__block').addClass('wave-active');
}, function() {
$('.info__block').one('animationiteration', function() {
$('.info__block').removeClass('wave-active');
})
});
}
}
new Main().jsInit();
body {
padding: 200px 200px;
}
.info__block {
width: 100px;
height: 100px;
background: aqua;
border-radius: 50px;
position: relative;
display: flex;
justify-content: center;
}
.info__block:before {
content: '';
position: absolute;
width: 100%;
height: 100%;
border-radius: 50px;
border-top: 2px solid aqua;
}
.info__block.wave-active:before {
animation: link-line 2.5s infinite .5s linear;
}
#keyframes link-line {
0% {
transform: translateY(0);
opacity: 1;
}
60% {
opacity: 0;
}
100% {
transform: translateY(-50%) scale(1.6);
opacity: 0;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="info__block info__block-1">
</div>
(Note: In the above demo sometimes the animation stops after just one iteration during the second and subsequent hover operations. This seems to be some glitch with the Run Snippet window. I don't see this problem happening in the Editor's output window or in this CodePen demo. If you also encounter the same problem let me know and I'll see if there is any fix for it.)
Note: The problem mentioned above has been fixed and the snippet is also updated with the revised code. Revised CodePen Demo.
An infinite animation doesn't have animationend event.