The scenario: one main container, a child img with opacity 1 and a child span with opacity 0, both absolute positioned against the relative positioned parent div. Decrease the opacity of img and simultaneously increase the opacity of span. When the opacity exceeds some threshold, e.g. 0.01 and 0.99 hide/show (display: none; display: inline-block) the img/span respectively. And then the reverse process to show the img and hide the span. What would be the best solution (probably using CSS3) to achieve that?
<div id="post-cont">
<img id="post-img-1" class="post-img" src="small.jpg"/>
<span id="post-txt-1" class="post-txt">Some text</span>
</div>
Had some workaround with JS, but it is laggy so I would like to solve this using CSS3 and as minimal JS as possible.
CSS3 only
http://jsfiddle.net/SPmj5/7/
<div id="post-cont">
<img id="post-img-1" class="post-img" src="http://placehold.it/250x250"/>
<span id="post-txt-1" class="post-txt">Some text</span>
</div>
#post-cont {
position: relative;
}
#post-cont img,
#post-cont span {
display:block;
-o-transition: opacity .7s ease;
-ms-transition: opacity .7s ease;
-moz-transition: opacity .7s ease;
-webkit-transition: opacity .7s ease;
transition: opacity .7s ease;
}
#post-cont img {
position: absolute;
top: 0;
left: 0;
opacity: 1;
}
#post-cont span {
position: absolute;
top: 100px;
left: 80px;
opacity: 0;
}
#post-cont:hover img {
opacity: 0;
}
#post-cont:hover span {
opacity: 1;
}
Be aware transition is not supported in IE8/9 http://caniuse.com/#search=transition
Sounds like some fadeToggle to me! I don't think you can use pure CSS3 for this..
https://api.jquery.com/fadeToggle/
Related
I tried to use ng-animate i included in my controller
app = angular.module('Packs', ['ngAnimate']);
This is my style:
<style>
.animate-in {
opacity: 0;
max-height: 0;
overflow: hidden;
-webkit-transition: all 0.5s;
-moz-transition: all 0.5s;
transition: all 0.5s;
}
.animate-out{
opacity: 1;
max-height: 200px;
-webkit-transition: all 0.5s;
-moz-transition: all 0.5s;
transition: all 0.5s;
}
</style>
This is the html that is not working, well, it does work, just i had to do it toggling classes manually, i wanted to use ng-animate
<div ng-click="toggle('pack1')">
<div class="text"
ng-class="{'animate-in' : !displays.pack1,
'animate-out' : displays.pack1}">
Some text to toggle
</div>
</div>
Yes, use ng-show = "displays.pack1" on your text and then use the special classes ng-hide/ng-hide-active, see example in the documentation
Here is a jsfiddle that shows a toggle with opacity and height: http://jsfiddle.net/1djeqjfm/1/
.box.ng-hide { opacity:0; }
.box.ng-hide-active { opacity:1; }
(Or use ng-if and its classes ng-enter/ng-leave)
So right now I'm building out our new website, and I've programmed a nice little sticky header using javascript. Here's my Javascript.
http://dev.yoursparksource.com
<script>
jQuery(window).scroll(function() {
if ($(this).scrollTop() > 1){
$('.stickyheader1').addClass("sticky");
}
else{
$('.stickyheader1').removeClass("sticky");
}
});
</script>
And my CSS for the stickyheader and .sticky added class
.stickyheader1 {
position: fixed;
width: 100%;
-webkit-transition: background .3s ease-in-out;
-moz-transition: background .3s ease-in-out;
-ms-transition: background .3s ease-in-out;
-o-transition: background .3s ease-in-out;
transition: background .3s ease-in-out;
height: 85px;
}
.stickyheader1.sticky {
background: rgba(0,0,0,0.80);
-webkit-transition: background .4s ease-in-out;
-moz-transition: background .4s ease-in-out;
-ms-transition: background .4s ease-in-out;
-o-transition: background .4s ease-in-out;
transition: background .4s ease-in-out;
}
And this works PERFECT. My problem is the dropdown menu. I styled a little CSS caret, and when you scroll down and the header background activates, the caret is on top of the header's space, and you can see it behind the semi-transperent header. (EWW! Tacky...)
What I'm wondering, is how can I target this element, as it's an :after pseudo class.. Here's the current CSS for the caret (or top triangle as some call it.)
#nav ul ul:After {
content: '';
position: absolute;
border-style: solid;
border-width: 0 10px 10px;
border-color: rgba(0,0,0,0.40) transparent;
display: block;
width: 0;
z-index: 1;
top: -10px;
left: 20px;
}
I tried just using the same javascript with the "#nav ul ul:After", but after researching, I learned how you can't add styles to a pseudo class. Duh, I knew that, just forgot. That's all. ;-) Any assistance on getting that little caret to go away when I scroll and the stick header's bg activates? Would be a lifesaver for me. (Also, if it can animate with the opacity transition like the header, that would rock. Once I figure out how to target it, I can add the css animation.
Thanks a MILLION in advance! I love StackOverflow.
You will need JavaScript to loop through the stylesheet, find the rule for #nav ul ul:After and set its display property to none after the sticky class is added to .stickyheader1.
jQuery(window).scroll(function() {
if ($(this).scrollTop() > 1) {
$('.stickyheader1').addClass("sticky");
var ss = document.styleSheets;
for (i = 0; i < ss.length; i++) {
var rules = ss[i];
for (j = 0; j < rules.cssRules.length; j++) {
var r = rules.cssRules[j];
if (r.selectorText == "#nav ul ul:After" || r.selectorText == "#nav ul ul::After") {
r.style.display = 'none';
}
}
}
} else {
$('.stickyheader1').removeClass("sticky");
}
});
I need to be able to fade in a second image above the initial image on hover. I need to make sure that second image isn't visible initially until it fades in. The other important note is that neither of the images should fade out entirely at any time. I've tried several approaches such as using 1 image, 2 images, jquery animate and css transition.
I've read that it is possible to animate a change of attribute using jquery? If this is true, how could I animate the change of 'src' in img using jquery?
$(".image").mouseenter(function() {
var img = $(this);
var newSrc = img.attr("data-hover-src");
img.attr("src",newSrc);
img.fadeTo('slow', 0.8, function() {
img.attr("src", newSrc);
});
img.fadeTo('slow', 1);
}).mouseleave(function() {
var img = $(this);
var newSrc = img.attr("data-regular-src");
img.fadeTo('slow', 0.8, function() {
img.attr("src", newSrc);
});
img.fadeTo('slow', 1);
});
This is what i'm currently using. It's the closest i've gotten. But you can see the image change which is not desirable.
Using a single html element with background images
HTML - doesn't get simpler than this
<div id="imgHolder"></div>
CSS
#imgHolder {
width: 200px;
height: 200px;
display: block;
position: relative;
}
/*Initial image*/
#imgHolder::before {
content:"";
top: 0;
left: 0;
bottom: 0;
right: 0;
position: absolute;
background-image:url(http://placehold.it/200x200);
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
z-index:10;
}
#imgHolder:hover::before {
opacity:0;
}
#imgHolder::after {
content:"";
background: url(http://placehold.it/200x200/FF0000);
top: 0;
left: 0;
bottom: 0;
right: 0;
position: absolute;
z-index: -1;
}
Demo
OR if you want to use image tags...
Stealing straight from: http://css3.bradshawenterprises.com/cfimg/
HTML
<div id="cf">
<img class="bottom" src="pathetoImg1.jpg" />
<img class="top" src="pathetoImg2.jpg" />
</div>
CSS
#cf {
position:relative;
height:281px;
width:450px;
margin:0 auto;
}
#cf img {
position:absolute;
left:0;
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
#cf img.top:hover {
opacity:0;
}
There are many other examples in the link as well to play with, but this will get you started.
Final Opacity
You've mentioned you don't want the initial image to disapear comletely. To do this change opacity:0 to opacity:0.5 or something similar. You'll need to experiment with that value to get the result you want.
Demo with final opacity of 0.8
Dynamic Image Sizes
I think you will be stuck with the two image version for this if just using CSS. HTML is the same.
CSS
#cf {
position:relative;
}
#cf img {
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
#cf img.bottom {
z-index:-1;
opacity:0;
position:absolute;
left:0;
}
#cf:hover img.top {
opacity:0.8;
}
#cf:hover img.bottom {
display:block;
opacity:1;
}
Demo
I´m trying to do an effect and show a search icon font when the mouse hover my "image1.png".
I already did the effect with jQuery but now I do not see how I can integrate the iconic font with jquery. Has anyone done something like that? Can you give a little help?
<article id="loop-news">
<span id="testIcon"><I class = "fa fa-search-plus" > <!--show just on mouse hover -->
<img src="image1.png" id="test" />
<h2>Title </h2>
<p>My Post</p>
</article>
My css to hide icon font at first:
#testIcon>i{display:none;}
My jquery to give an opacity effect:
$("#test").hover(function() {
$(this).animate({opacity: 0.5}, 500);
}, function() {
$(this).animate({opacity: 1.0}, 500);
});
I would use CSS3 transitions if I understand your issue. In this example, I would just replace the font-family with your icon font (assuming that's how it works - never used it).
h2 {
position: aboslute;
margin-top: -350px;
display: none;
text-align: center;
font-family: arial;
}
#loop-news:hover h2 {
display: block;
}
#loop-news:hover img {
opacity: .5;
}
img, h2 {
-webkit-transition: all .8s ease;
-moz-transition: all .8s ease;
-ms-transition: all .8s ease;
-o-transition: all .8s ease;
transition: all .8s ease;
}
JS Fiddle
I'm having a small issue with my code. I have an element that when the page scrolls it will appear. However, I cannot get it to "appear" in a smoother way. I have tried CSS transitions and attempted fadeIn but neither work. It always just "jumps" in, I cannot get it to ease in.
Here is the code:
$(window).on("scroll", function () {
$('.navbar').toggleClass('visible', $(document).scrollTop() > 40);
});
So it appears just fine, but I can't figure out how to animate adding the class name.
This is the CSS btw:
.navbar {
visibility: hidden;
}
.navbar.visible {
visibility: visible;
}
visibility can't be animated with CSS transitions.
But you can do :
.navbar {
opacity: 0;
transition: opacity .5s ease; // Feel free to use prefixes.
}
.navbar.visible {
opacity: 1;
}
CSS transition / animations is surely the best way to animate something in 2014. You should avoid fadeToggle() and others jQuery animation methods.
instead of using toggleClass, use fadeToggle. it will do everything for u as far as CSS..
give it a try, just fadeToggle();
Here is the example of your code with correct css transition. You cannot animate visibility, but you can play with position and opacity.
http://jsfiddle.net/xZ6fm/
.navbar {
position: fixed;
top: -100px;
left: 0; right: 0;
padding: 12px;
opacity: 0;
background: #ccc;
}
.navbar.visible {
top: 0;
opacity: 1;
-webkit-transition: top 0.3s linear, opacity 0.7s linear;
-moz-transition: top 0.3s linear, opacity 0.7s linear;
transition: top 0.3s linear, opacity 0.7s linear;
}
As indicated in the other answer, fadeToggle() will get the work done for you. And frankly, it's probably the easiest way to accomplish such an effect.
CSS transitions require the transition property. Place this block of code in each of your CSS declarations:
transition: visibility .25s linear;
-webkit-transition: visibility .25s linear;
-moz-transition: visibility .25s linear;
-o-transition: visibility .25s linear;
If you have difficulties with visibility, try using opacity instead.