CSS Opacity animation in AngularJS

Question

I'm new to Angular and I'm trying not to depend on jQuery for this fadeIn animation I want.

I've tried ng-animate and .fade-enter + .fade-enter.fade-enter-active, but I'm getting nowhere.

my footer CSS looks like this:

footer {
  opacity: 0.3;
  text-align: center;
}

And I'm trying to animate it such that opacity goes to 1 in 2 seconds.

This is the version of Angular I am running:

<script data-require="angular.js@1.1.5" data-semver="1.1.5" src="http://code.angularjs.org/1.1.5/angular.min.js"></script>

How would I do this animation with Angular and CSS and without jQuery?

You can create AngularJS demos of code at http://plnkr.co/, which will help understand what you've tried. — Jared Farrish, Aug 24 '13 at 19:33
Also, you might check out: http://stackoverflow.com/a/12489271/451969 Which uses pure CSS, with jQuery toggling a class. Note: Only works in Webkit. Technically, what you need to do is modify the `opacity` for an element from `1` to `0` and vice versa, so some Javascript to start at one value and increment/decrement over a period of time (`setTimeout()`) to the other value is what you need. — Jared Farrish, Aug 24 '13 at 19:41
Hey Jared, Thanks for the link. I could also use jQuery's .animate(), but I want to use CSS and Angular exclusively. Here's the plunker: http://plnkr.co/edit/u3ENd655gl1JwDM06Aso — platypus, Aug 24 '13 at 19:46
Have you tried the official docs? http://www.nganimate.org/angularjs/ng-repeat/appear — Jared Farrish, Aug 24 '13 at 19:49
Yeah, but I'm just not getting it :( I also can't get it to trigger on a click. In my head, it makes sense for ng-click="replaceThis()" ng-animate="{{replaceThisVariable}}", but it doesn't work at all for me. I'm definitely doing something wrong, but I don't know what it is. — platypus, Aug 24 '13 at 19:57
Are you stuck with version 1.1.5 or can you use the newly released version 1.2 RC1? — Michael Benford, Aug 24 '13 at 20:04

score 3 · Accepted Answer · answered Aug 24 '13 at 20:32

Here's an example of how to do a fade in/out animation in Angular 1.1.5:

HTML

<body ng-init="visible = true">
  <button ng-click="visible = !visible">Show/Hide</button>
  <p ng-show="visible" ng-animate="'fade'">Hello {{name}}!</p>
</body>

CSS

.fade-hide, .fade-show {
  -webkit-transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
  -moz-transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
  -o-transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
  transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
}

.fade-hide {
  opacity:1;
}

.fade-hide.fade-hide-active {
  opacity:0;
}

.fade-show {
  opacity:0;
}

.fade-show.fade-show-active {
  opacity:1;
}

Plunker here.

This blog post has good information on animations in Angular 1.1.5. And I suggest taking a look at the new animation system released in Angular 1.2 RC1.

score 0 · Answer 2 · answered Jan 14 '15 at 17:48

All you need about animation can be found on their documentation

HTML

<div ng-init="checked=true">
  <label>
    <input type="checkbox" ng-model="checked" style="float:left; margin-right:10px;"> Is Visible...
  </label>
  <div class="check-element sample-show-hide" ng-show="checked" style="clear:both;">Visible...</div>
</div>

CSS

.sample-show-hide {
  padding:10px;
  border:1px solid black;
  background:white;
}

.sample-show-hide {
  -webkit-transition:all linear 0.5s;
  transition:all linear 0.5s;
 }

.sample-show-hide.ng-hide {
   opacity:0;
}

source: https://docs.angularjs.org/guide/animations

CSS Opacity animation in AngularJS

2 Answers2

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