I'm using bxSlider, for each slide I have several HTML elements not just an image. I need to make the active slide bigger than the others, I already accomplished that using css zoom and transition, but when I move from the first slide to the second slide or from the second one to the first one, my transition is missing, I mean it only grows up but it doesn't do the animation, it's ok for all the other slides, does anyone know why this transition breaks?
This is my code
$('#sliderTrend').bxSlider({
slideWidth: 300,
minSlides: 1,
maxSlides: 3,
moveSlides: 1,
slideMargin: 3,
pager: false,
onSliderLoad: function () {
$('#sliderTrend>div:not(.bx-clone)').eq(1).addClass('active-slide');
$('#sliderTrend>div:not(.bx-clone)').eq(1).removeClass('inactive-slide');
},
onSlideBefore: function ($slideElement, oldIndex, newIndex) {
$('.slideC2').removeClass('active-slide');
$('.slideC2').addClass('inactive-slide');
$($slideElement).next().removeClass('inactive-slide');
$($slideElement).next().addClass('active-slide');
}
});
And these are my css classes
.active-slide {
zoom:100%;
margin-top:0px;
-moz-transition: zoom 150ms linear, margin-top 150ms linear;
-webkit-transition: zoom 150ms linear, margin-top 150ms linear;
-o-transition: zoom 150ms linear, margin-top 150ms linear;
transition: zoom 150ms linear, margin-top 150ms linear;
}
.inactive-slide {
zoom:75%;
margin-top:60px;
-moz-transition: zoom 150ms linear, margin-top 150ms linear;
-webkit-transition: zoom 150ms linear, margin-top 150ms linear;
-o-transition: zoom 150ms linear, margin-top 150ms linear;
transition: zoom 150ms linear, margin-top 150ms linear;
}
SO36637125
Why does bxslider breaks my transition between last and first slide?
It's hard to be certain with bxSlider, it's a very flexible yet temperamental plugin. I believe it was the callbacks were too much. Every slider was removing and adding 2 classes all at once, which isn't healthy behavior for a single thread language like JavaScript.
When dealing with active and inactive states, you should know that bxSlider has it's own .active class and the active slider is always going to be the slide on the left, not the middle. So taking that into account, this is whats been done:
Removed the .inactive-slide class. Instead of having two states to deal with, use an active state, and use the default state (which is how slides are normally).
Changed the .active-slide class to .act because it saves time typing less. Changed the CSS rules to:
.act {
transition-duration: 1s;
transition-timing-function: ease-in;
transform: scale(2);
transform-origin: center center;
z-index: 9999999;
}
Using z-index to overlap the slides to the right and left.
Notice there's no position property. That's because by default each slide is position: relative.
-For details on the animation properties, you can find it here.
Removed the onSliderLoad callback because it's flaky. I've used bxSlider for a couple of years, and I have only been able to get it to work a few times.
Changed the onSlideBefore callback to simplify it:
onSlideBefore: function($ele, from, to) {
var $act = $ele.next();
$act.addClass('act');
$act.siblings().removeClass('act');
}
The first line basically references the real active slider that is positioned on the left (i.e. $ele) and targets the next slide after the active slide so now the .act class will be assigned to the middle slide.
The second line .addClass('act') to the middle slide (i.e. $act).
The last line ensures that there's only one $act slide by using .siblings() to remove .act class from every slide except $act.
This works because there's only one class to handle.
README.md
PLUNKER
Related
I use html, css, angularjs in the front.
I've got an img which in the initial state is surrounded with a full circle of a thick border. I start a countdown of a minute. I would like the border to get partially disappeared as the time goes down.
For example, after the first second only 59/60 of the perimeter of the border is shown, after the second one only 58/60 is shown, ..., after 30 seconds there's only a half of a circle and so on, until it gets totally disappeared.
In addition, if it's possible, I would like the transitions to be smooth.
Thanks for any help
You have to use a combination of ng-class for conditionnal CSS on your case AND css transition.
See for example this example of a smooth transition that is for a 5s for an element to be half visible
#myTransition {
opacity: .5;
transition: opacity .5s ease-out;
-moz-transition: opacity .5s ease-out;
-webkit-transition: opacity .5s ease-out;
-o-transition: opacity .5s ease-out;
}
I am trying to create a fairly complex animation, where the content resizes into and out of a sidebar. Here's a quick Keynote prototype to explain what I'm after:
I started using flex-box and changing the flex-direction from row to column, as well as moving the container div into a "sidebar" on the left. However as it turns out, flex-direction is not animatable.
I then had a look at Alex Maccaw's Magic Move jQuery plugin, but I haven't been able to get anywhere with that. Same deal with using absolute positioning and animating the position.
Suggestions on an approach would be awesome.
I gave implementing this a shot using chained CSS animations. Here's the result: http://codepen.io/chrisdarroch/full/PNjpaG/
The crux of the solution is to create two sets of elements -- the nav items and the panels -- and then have animations for the base states and "active" states of each.
.nav-item {
animation: grow 1*$n ease-in;
animation-fill-mode: both;
&.active {
animation: fade 0s 1*$n, shrink 1*$n linear 3*$n;
animation-fill-mode: forwards;
}
}
.panel {
animation: grow 0*$n linear;
animation-fill-mode: both;
&.active {
animation: appear 0s linear 1*$n, slidein 1*$n ease-out 1*$n;
animation-fill-mode: both;
}
&.inactive {
animation: shrink 1*$n linear;
animation-fill-mode: both;
}
}
I've left out the implementations of each #keyframe animation for brevity; check the codepen for the full source.
The above is written using SCSS. The important thing to note is the $n variable. It's a value in seconds -- e.g., $n: 0.5s. It's used to coordinate the delay times and animation times for each stage of the animation.
My solution isn't 100% complete, but you might get an idea for how to chain animations to achieve your design.
I am working on a project where users go back and forth between modals. I'm trying to do this by css transitioning opacity from 0 to 1. However, I noticed something is going very slow with my transitions.
I am getting about a 900ms to 2,000ms lag delay with some of my transitions, so I hooked up my phone to my laptop using chromes remote dev tools https://developer.chrome.com/devtools/docs/remote-debugging and started recording performance events https://developer.chrome.com/devtools/docs/timeline
This is an image of the recorded events fired from the phone. The yellow block is the jQuery click event handler firing, the yellow stripes belong to a jQuery.animate() function. However that green block at the bottom is almost 2 seconds long and it's labeled "Rasterize Paint". The purple slivers on the right are the actual animation taking place.
(EDIT: The jquery.animate() is different from the css animation taking place at the same time. I am adding a class in the event handler that changes opacity of an element that has transition: opacity 300ms set)
What does 'Rasterize Paint' mean? Why does this take so long? What can I do to avoid this?
EDIT:
Here is a fiddle of the page I'm running. I wasn't able to make a fiddle have the meta tag so it may have an extra 300ms delay on mobile devices. I recommend going through the steps "Got It! -> Fighter -> Accept -> Archery" After selecting "Archery" that is the slowest transition on the page. Why is that? I assume the layered opacities makes it very slow, but I still don't know for sure.
https://jsfiddle.net/2fLb1fd2/4/
.step {
position: absolute;
width: 100%;
max-width: 650px;
background: rgba(16, 16, 16, 0.8);
-webkit-transition: opacity 300ms linear, top 300ms linear;
-moz-transition: opacity 300ms linear, top 300ms linear;
-o-transition: opacity 300ms linear, top 300ms linear;
transition: opacity 300ms linear, top 300ms linear;
opacity: 0;
top: -100px;
left: 0;
right: 0;
margin: 30px auto 20px;
padding: 20px 20px;
color: white;
pointer-events: none;
text-align: center;
}
.step.showing {top:0;opacity:1;pointer-events:auto;}
Your problem here probably isn't opacity, opacity is a very cheap property (performance-wise) to animate with CSS. You are animating the top property however, this will trigger reflow each frame it is animated.
In order to make your animation smoother, you should animate transform: translateY(x); instead of the top property.
I created this site with a header that transitions using jQuery Ui and twitter bootstrap. The idea is that there are two classes .navbar-transparent and .navbar-white and I use the .switchClass() function that jQuery Ui Effects provides that transitions the change in the two classes when the scroll position of the page isn't at the top.
The problem however, the nav as it is now is, I believe the technical term is "janky". The transition isn't smooth, and when going from transparent to white the none of the font color doesn't transition at all, it just plops into black.
This shopify theme Retina / Austin does a great job of making that transition smooth with a css transition.
.header{
-webkit-transition: all 500ms ease;
-moz-transition: all 500ms ease;
-o-transition: all 500ms ease;
-ms-transition: all 500ms ease;
transition: all 500ms ease;
}
Here's my javascript code:
mindful_matter.header = function() {
if ($(".navbar-transparent").length == 0) return false;
var callback = function() {
var scrolled_val = $(document).scrollTop().valueOf();
if (scrolled_val > 0) {
$(".navbar").switchClass("navbar-transparent", "navbar-white");
} else {
$(".navbar").switchClass("navbar-white", "navbar-transparent");
}
}
callback();
$(window).scroll(callback);
}
Is there any way I can make the transition smoother? Using the setup I already have? Can I use a css transition when I have two classes that need to be swapped for one another?
.navbar{
transition: background-color 500ms ease;
}
I have founded this -> http://www.building58.com/examples/tabSlideOut.html
But there are some reasons that i dont want to use it:
i need prototype framework instead of jquery
i need an image to open slider (click to open) and when it opened image will change to "click to close"
Maybe someone has already the same solution of my question?
thank for you help!
CSS transitions were made for this sort of thing! For a demonstration of what you're looking for see http://jsfiddle.net/Fw7MQ/ (The 'handle' changes background colour but you could easily make that a background image instead)
The crucial parts of CSS are;
#drawer {
position: relative;
left: -200px;
/* transition is repeated for all supporting browsers */
-webkit-transition: left 0.5s ease-in-out;
-moz-transition: left 0.5s ease-in-out;
-o-transition: left 0.5s ease-in-out;
-ms-transition: left 0.5s ease-in-out;
transition: left 0.5s ease-in-out;
}
#drawer.open {
left: 0;
}
The 'drawer' has a class name added or removed as necessary using this tiny javascript snippet;
Event.observe('handle', 'click', Element.toggleClassName.curry('drawer', 'open'))
...but you could dispense with even that if the animation was done on mouseover instead - change the CSS selector from #drawer.open to #drawer:hover.
For older browsers it degrades gracefully, the animation doesn't play but the drawer still appears in the right place.