CSS Opacity animation in AngularJS

问题

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?

回答1:

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.

回答2:

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

来源：https://stackoverflow.com/questions/18422326/css-opacity-animation-in-angularjs

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javascript

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animation

angularjs

fade