I'm creating a dashboard page which is full of CSS animations. From Bootstrap stuff (animated progress bars) to custom animations.
When you click some of the elements, a near full-screen modal is triggered, which overlaps all the animations, so I want to temporarily pause them all (because of possible performance issues) by adding/removing a class to one of the top elements, and using CSS to pause all animations when that class is set.
This solution would use only a single line of js, just to toggle the class on opening the modal.
My template looks somewhat like this:
<body>
<div class="modal">
<!-- Modal code -->
</div>
<div class="app">
<!-- Template -->
</div>
</div>
Is it possible to add a class to .app which pauses every CSS animation in every child element?
Note 1:
I know you can use the exact opposite of what I request: namely, have a default .animation-play class to one of the top elements, and prefix every child element with an animation with this class, and then remove this class to pause every animation. Just like:
app.animation-play .somediv .somediv .element {
// animation code
}
app.animation-play .somediv .element {
// animation code
}
app.animation-play .somediv .somediv .somediv .somediv .element {
// animation code
}
But then I have to edit a lot of CSS code, and it doesn't look very nice either.
Note 2:
I'm also open for a JS solution, but I would heavily prefer a pure CSS way of achieving this.
You can use a universal selector to target everything when a class of 'paused' is added to your app wrapper, however many CSS linters still warn against using these due to performance impacts.
To be honest the impact is probably minimal these days and many CSS resets for example use them.
You could use something like:
.app.paused * {
animation: none;
}
EDIT:
Looking through the comments above it seems as though the above selector doesn't have enough precedence to overwrite the animations so '!important' has been added.
.app.paused * {
animation: none !important;
transition: none !important;
}
However this is generally not a great idea, I always try to avoid using '!important' at all costs due to the difficulty in maintaining the stylesheet with these selectors in place. If you can overwrite the animations with a greater precedence then it would be better to do so rather than using '!important'.
EDIT 2:
As you mentioned you were open to JS solutions, here is some JS that should clear all the animations within a given selector. I'm not sure what the performance impact of doing it this way is but I added it here just in case someone else prefers to do it only using JS:
let stopAnimationsWrap = document.querySelector('.app');
let stoppedAnims = [];
// Stop animations
document.querySelector('.stop').addEventListener('click', () => {
let appAllEls = stopAnimationsWrap.querySelectorAll('*');
let allElsAr = Array.prototype.slice.call(appAllEls);
allElsAr.forEach((thisEl) => {
let elClass = thisEl.classList[0];
let cs = getComputedStyle(thisEl, null);
let thisAnimation = cs.getPropertyValue('animation-name');
if (thisAnimation !== 'none') {
stoppedAnims.push([elClass, {
'animationName': thisAnimation
}]);
thisEl.style.animationName = 'none';
}
});
});
// Start animations
document.querySelector('.start').addEventListener('click', () => {
stoppedAnims.forEach((thisEl) => {
let domEl = '.' + thisEl[0];
stopAnimationsWrap.querySelector(domEl).style.animationName = thisEl[1].animationName;
});
});
Fiddle:
https://jsfiddle.net/vu6javb2/14/
.app {
-webkit-animation-play-state: paused; /* Safari 4.0 - 8.0 */
animation-play-state: paused;
}
on hover:
.app:hover {
-webkit-animation-play-state: paused; /* Safari 4.0 - 8.0 */
animation-play-state: paused;
}
Related
I have a weird issue where if I play an animation on one of my 3 monitors, YouTube videos on any other monitor crashes. I did fix this by disabling hardware acceleration in chrome://flags, but a new update in Chrome recently made the issue come back, and I haven't found a way to fix it yet. Animations occur on places like Facebook ("Someone is typing a comment...") or basically any website with a animation-duration CSS property on something (spinners are probably the most used form of animations I guess).
I can verify this simply by placing this CSS on any page:
* {
animation-duration: 0s !important;
}
Boom instantly all my videos play perfectly. No issues what so ever. I could add this to an userscript (or make a tiny extension), and I don't think it would mess up too much, but I'm more interested in knowing if there's a Chrome flag that can disable animations completely? I don't know if animation-duration works for any animation.
From what I know Chrome has no such option.
But, I was able to make something similar using the Tampermonkey extension.
Simply add the following script to the extension:
// ==UserScript==
// #name Animation Stopper
// #description Stop all CSS animations on every website.
// #author Ba2siK - https://stackoverflow.com/users/7845797
// #match *://*/*
// #grant GM_addStyle
// #run-at document-end
// ==/UserScript==
GM_addStyle(`
*, *:before, *:after {
transition-property: none !important;
transform: none !important;
animation: none !important;
}`
);
console.log("Animation Stopper ran successfully");
Make sure it's enabled at the extensions bar
Note: it won't work on iframe elements.
Btw, You can disable the window animation in chrome by adding the --wm-window-animations-disabled command-line flag.
* {
animation: none !important;
}
/* turn off animation on all elements*/
Allow me to answer my own question. Setting animation-duration to 0s !important seems to be working. However, I added animation-play-state: paused for good measure as well.
I made an userscript, and found that it doesn't target the Shadow DOM, so I have to traverse through every element, check if it's a shadow root, and then add the CSS. Since elements can be added to a page dynamically, I decided to do this every second. So far I cannot see a performance difference, even on pages with a lot of elements.
Install TamperMonkey (Chrome) or GreaseMonkey (Firefox) to use this:
// ==UserScript==
// #name Disable all animations
// #version 1.0
// #author mortenmoulder
// #include *
// #grant GM_addStyle
// #grant GM_addElement
// ==/UserScript==
//remove animations globally
GM_addStyle("* { animation-duration: 0s !important; animation-play-state: paused; }");
var ignoreElements = [];
//remove animations inside shadow DOM elements
function findShadowRoots(elements) {
for (var i = 0; i < elements.length; i++) {
if(elements[i].shadowRoot) {
if(ignoreElements.includes(elements[i].shadowRoot) == false) {
GM_addElement(elements[i].shadowRoot, 'style', { textContent: '* { animation-duration: 0s !important; animation-play-state: paused;' });
ignoreElements.push(elements[i].shadowRoot);
}
findShadowRoots(elements[i].shadowRoot.querySelectorAll("*"));
}
}
}
//remove animations every 1 second
setInterval(() => {
var allNodes = document.querySelectorAll('*');
findShadowRoots(allNodes);
}, 1000);
I want to create a smooth transition between 2 images with a legend.
The images come from an object-array of images.
Because works only on single tags and components, I've created a component to define the image+legend.
<transition>
<home-image :slide="slide" :key="slide"></home-image>
</transition>
The classes I define are like this
.v-enter-active,
.v-leave-active {
transition: opacity 2s ease-in-out;
}
.v-leave,
.v-enter-to {
opacity: 1;
}
.v-enter,
.v-leave-to {
opacity: 0;
}
The new image is returned by a method
updateSlide() {
this.slide = this.entries[ Math.floor( Math.random() * this.entries.length ) ];
}
where entries is my array defined in data
this.slide is updated in regular intervals, every 10seconds like this, which is defined in the created() section
this.updateSlide();
this.uSlide = setInterval( this.updateSlide, 10000);
The code works, in the sense that a new image is loaded in this.slide every 10 seconds.
However, the transitions work only "half-way".
There is no transition fading out: the "old image" disappears and makes way for the new image fading in.
However, what I'd like is a smooth transition from one to the other.
I've tried more than a couple of ideas including using mode="out-in" and "in-out" but nothing works as I want.
What am I overlooking?
Is it possible to restate(override) css-transition after it has already triggered?
It seems down right impossible to override transition-delay after the css-transition has already taking effect.
(Especially considering the possible case when delay duration might have past already, delay value gets shortened and so on.)
However I failed to find concrete explanation.
I suppose css-transition has to be instructed at before or the exact same time when the change of target property (background-color in this case) is instructed?
(Sorry I had to edit numerous times to narrow down my question. If anyone wonder why I need such thing, I explained a mechanism I want below. It's already in simplified of my project.)
What I'm trying to do is
Before jQuery 'load' event, background-color: transparent is applied.
Then on jQuery 'load' event, apply background-color: red
(which is determined by css with class name loaded added by jQuery).
On the otherhand, transition-delay is determined separately by its class name which is provided by jQuery.
Clarification
Just to differentiate from other similar questions..
I only need transition-delay to be override conditionally.
Although interestingly, it would succeed when background-color is changed alongside.
Overriding happens conditionally, i.e: CSSOM remains constant but DOM's class name might change after its initial state. (To be specific to this case, class is added when the button is pressed.)
Override succeeds while DOM stays constant, but that's not what I want.
Here's fiddle to illustrate the situation
HTML
<div>
<!-- class name "loaded" will be given after load event. -->
<p class="delay delay-1s">
<!-- class name 'delay-1s' will be replaced with 'delay-5s' with button -->
This will be turning into red after loaded in..<br>
1.) 1 seconds without button or<br>
2.) 5 second with button
</p>
</div>
<button id="change-delay">Change delay to 5s</button>
CSS
/* Make P from transparent to red when loaded */
div p {
background-color: transparent;
}
div.loaded p {
background-color: red;
}
.delay.delay-1s {
transition-delay: 1s;
}
.delay.delay-5s {
transition-delay: 5s;
}
Javascript
$(window).on('load', function(){
$('div').addClass('loaded');
});
$('button#change-delay').click(function() {
$('.delay').removeClass('delay-1s').addClass('delay-5s');
});
I tested this on Chrome/Firefox updated to this day (Sep 2017), but both returned the same result.
edit1:
I'm pretty sure this has something to do with the time to provide class name.
If I add the class btn-pressed in HTML, i.e hardcode them on the document, override works as intended. Although, it wouldn't happen exclusively when the class is modified.
edit2:
Added clarification.
edit3:
Narrowed down question.
edit4:
adding timelapse of event happening on code:
Loads document.
P gets background-color: transparent and transition-delay: 1s;
Loading is done, adding class 'loaded' to DIV,
P gets background-color: red and fires css-transition
BUTTON gets clicked*, adding class 'btn-pressed' to DIV.
P gets transition-delay: 5s; assigned, overrides CSSOM; however, since css-transition from 2. is already in action, it doesn't take effect.
*Surely, if BUTTON has clicked before loading completed, it will take effect.
I was too lazy to read W3C documents but maybe that's what I should do in spare time..
Html code here
<div class="bg">
<p>test here</p>
</div>
<button class="btn">Activate</button>
Css code here
.bg {
min-height: 200px;
background-color: transparent;
}
Js code here
$(window).on('load', function(){
var delay = 5000;
If ( $('.bg').hasClass('pressed') ) {
delay = 2000; //set delay to 2 sec,
}
$('.btn').on('click', function() {
$('.bg').addClass('pressed');
});
$('.bg').animate({
'background-color': 'red'
}, delay);
});
I assume that you have jquery. If any issue plz let me know by putting a comment below.
I hope this is what you need.
Note - Make few changes as per you needs like class name and events.
I have a div like this:
<div class="row">
<alert ng-repeat="alert in alerts" type="alert.type" close="closeAlert($index)">{{alert.msg}}</alert>
</div>
I create the alerts in angularjs (and I'm using bootstrap), and while this works great, the visual effect is kind of uncool. As alerts are added to the div, all page content is shoved ungracefully down to make room for the new alert.
I would like to animate the movement so that it is at least smooth. But I don't want to use jQuery. I've played with the CSS3 transitions, but can't seem to get them to work smoothly.
Can I do this where the trigger is a change in div height? How?
you can do it with directives in their link function. i think you wont mind about so small piece on jquery code
myModule.directive('animateRight', function () {
var linker = function (scope, element, attrs) {
var right = function() {
$(this).animate({
{"height": "800px"},
"fast");
})
}
element.on('click', right);
};
return {
restrict:'A',
link:linker
}
})
<div animate-right class="box"></div>
Ok, so I don't like to answer my own question, but this seems like the way to do it...
I used AngularJS 1.2, along with the new ngAnimate module. You need to add angular-animate.js, and reference the animate module, so at the end here's what my modules looked like:
var app = angular.module('tracker', ['$strap.directives', 'ui.bootstrap', 'ngRoute', 'ngAnimate']);
After that, its super simple, and very much CSS3 animations. My alert line ended up with a class repeat-item:
<alert class="repeat-item" type="alert.type" data-ng-repeat="alert in alerts" close="closeAlert($index)">{{alert.msg}}</alert>
And I added some CSS to target that class with the angularjs triggers:
.repeat-item.ng-enter,
.repeat-item.ng-leave {
-webkit-transition: 0.2s linear all;
-moz-transition: 0.2s linear all;
-o-transition: 0.2s linear all;
transition: 0.2s linear all;
}
.repeat-item.ng-enter,
.repeat-item.ng-leave.ng-leave-active {
opacity: 0;
}
.repeat-item.ng-leave,
.repeat-item.ng-enter.ng-enter-active {
opacity: 1;
}
And voila a nice fade in and out animation.
This page really explains very well how to do it. Cheers to Michael Benford for the great link.
I have built a website that has lots of animations, using CSS3. The elements that are animated all have the position attribute set to absolute, and the container's position set to relative. Each element initially has a top and left value (set via the style attribute), but when the page loads, all the elements are initially animated to the position defined from top:0px;left:0px. Is there a way for the page to start off with the elements at there desired positions without them initially being animated?
Your CSS animations are ready before your javascript. I usually add a class to the body so I know it's ready for animations...
window.onload = function(){
document.body.className += " animated";
}
and then in your CSS
.box {
/* usual styles here*/
}
.animated .box {
-prefix-animation: animationName duration ease;
}