css,angularjs,css3,animation,css-animations , Animate removal of list items with css


Animate removal of list items with css

Question:

Tag: css,angularjs,css3,animation,css-animations

I have made the animation of a showing/hiding a list of messages. See this plunk. But how can I adapt it to also make an animation when a message is removed from the list?

My css:

.messages-active.messages {
  max-height: 50px;
}

.messages {
  -webkit-transition: max-height 1s;
  -moz-transition: max-height 1s;
  -ms-transition: max-height 1s;
  -o-transition: max-height 1s;
  transition: max-height 1s;
  background-color: AntiqueWhite;
  overflow: hidden;
  max-height: 0;
}

My index file (using Angular):

<body ng-app="app" ng-controller="TestCtrl as test">
  <button ng-click="test.toggle = !test.toggle">Show messages</button>
  (current: {{test.toggle}})
  <div class="messages" ng-class="{ 'messages-active': test.toggle }" ng-repeat="message in test.messages">
    {{message}} <a href ng-click="test.remove($index)">remove</a>
  </div>
</body>

Answer:

The idea is to set the height of container and add transition to the height.

$scope.styles.height = $scope.messages.length * 20 + 'px';

http://plnkr.co/edit/3dnGeVoQ1DbX55WQtJjk?p=preview


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