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I have looked at the official show/hide transition example at the bottom of this page... http://docs.angularjs.org/api/ng.directive:ngShow
I have tried to modify it to get a seemless fade transition (transition: opacity 0.5s ease-in-out) from one div to the other, where both divs occupy the exact same position on the page, so that one div completely fades out before the other div begins to fade in.
In jquery, it would be as simple as:
$("#divA").fadeOut(function() { $("divB").fadeIn(); });
Does anyone have any advice on the best way to achieve this with angular, with respect to the linked example, which uses a single model "checked" to trigger the transition?
700
The ngAnimate module provides support for CSS-based animations (keyframes and transitions) as well as JavaScript-based animations via callback hooks. Animations are not enabled by default, however, by including ngAnimate the animation hooks are enabled for an AngularJS app.
Definition and Usage The fadeOut() method gradually changes the opacity, for selected elements, from visible to hidden (fading effect). Note: Hidden elements will not be displayed at all (no longer affects the layout of the page). Tip: This method is often used together with the fadeIn() method.
The Fade In/Fade Out behavior lets you dissolve into and out of any object by ramping the opacity of the object from 0 percent to 100 percent at the start, and then back to 0 percent at the end. You can eliminate the fade-in or fade-out effect by setting the duration of the Fade In Time or Fade Out Time to 0 frames.
Wildcard statelinkAn asterisk * or wildcard matches any animation state. This is useful for defining transitions that apply regardless of the HTML element's start or end state. For example, a transition of open => * applies when the element's state changes from open to anything else.
I used the example in ngShow to make the following jsfiddle based on angular1.2.0-rc.3.
The html code:
<div ng-app="App">
Click me: <input type="checkbox" ng-model="checked"><br/>
<div class="check-element animate-show" ng-show="checked">
<span class="icon-thumbs-up"></span> I show up when your checkbox is checked.
</div>
<div class="check-element animate-show" ng-hide="checked">
<span class="icon-thumbs-down"></span> I hide when your checkbox is checked.
</div>
</div>
The CSS styles
.animate-show.ng-hide-add,
.animate-show.ng-hide-remove {
-webkit-transition:all linear 0.5s;
-moz-transition:all linear 0.5s;
-o-transition:all linear 0.5s;
transition:all linear 0.5s;
display:block!important;
}
.animate-show.ng-hide-add.ng-hide-add-active,
.animate-show.ng-hide-remove {
line-height:0;
opacity:0;
padding:0 10px;
}
.animate-show.ng-hide-add,
.animate-show.ng-hide-remove.ng-hide-remove-active {
line-height:20px;
opacity:1;
padding:10px;
border:1px solid black;
background:white;
}
.check-element {
padding:10px;
border:1px solid black;
background:white;
}
And finally the JavaScript code, don't forget to include the libraries angular.js and angular-animate.js
angular.module('App', ['ngAnimate']);
I hope it helps you ;)
197
Using the ngAnimate module, you can do this in pure CSS with the -transition-delay directive:
Plunker
HTML
<body ng-app="ngAnimate">
Click me: <input type="checkbox" ng-model="checked">
<br/>
<img ng-show="checked" src="img1.jpg">
<img ng-hide="checked" src="img2.jpg">
</body>
CSS
img {
position: absolute;
}
.ng-hide-add-active {
display: block!important;
-webkit-transition: 0.5s linear all;
transition: 0.5s linear all;
}
.ng-hide-remove-active {
display: block!important;
-webkit-transition: 0.5s linear all;
transition: 0.5s linear all;
-webkit-transition-delay: 0.5s;
transition-delay: 0.5s;
}
.ng-hide {
opacity: 0;
}
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