Angular JS - How can i animate on model change?

Question

i\'m trying to do a nice fadeout+fadein transition when the currentVertical changes. in knockout it was so simple but i can\'t figure it out here. please help.

the foll

Answer 1

You have to use custom or create directives to start advanced DOM manipulation like animations.

Here's a fiddle with the animation you requested, I use the visible variable on scope to trigger fading and the $timeout service to only change the selectedItem when fadeOut, it could be improved to pass a timeout and a callback as a directive option...

Fiddle: http://jsfiddle.net/g/Bs66R/1/

JS:

function VerticalsController($scope, $timeout) {

  $scope.verticals = [{
    title:'internet',
    pricings: [{
      name: 'netvision',
      monthly: 23
    },
    {
      name: 'hot',
      monthly: 33
    },
    {
      name: '012',
      monthly: 28
    }]
  },
  {
    title:'cellular',
    pricings: [{
      name: 'cellcom',
      monthly: 20
    },
    {
      name: 'pelephone',
      monthly: 30
    },
    {
      name: 'orange',
      monthly: 25
    }]
  },
  {
    title:'banks',
    pricings: [{
      name: 'leumi',
      monthly: 20
    },
    {
      name: 'poalim',
      monthly: 30
    },
    {
      name: 'benleumi',
      monthly: 25
    }]
  }];

  $scope.selected = [
  ];

  $scope.currentIndex = 0;
  $scope.currentVertical = $scope.verticals[0];

  $scope.selectPricing = function(pricing) {
    $scope.selected.push(pricing);
    $scope.currentIndex++;
    $scope.visible = false;

    $timeout(function(){
      $scope.currentVertical = $scope.verticals[$scope.currentIndex];
      $scope.visible = true;
    }, 1000);
  };

  $scope.visible = true;
}

var fadeToggleDirective = function() {
  return {
    link: function(scope, element, attrs) {
      scope.$watch(attrs.uiFadeToggle, function(val, oldVal) {
        if(val === oldVal) return; // Skip inital call
        // console.log('change');
        element[val ? 'fadeIn' : 'fadeOut'](1000);
      });
    }
  }
}

angular.module('app', []).controller('VerticalsController', VerticalsController).directive('uiFadeToggle', fadeToggleDirective);

angular.bootstrap(document.body, ['app']);    angular.bootstrap(document.body, ['app']);

HTML:

Pricing Poll

  

    
{{currentVertical.title}}

    

      

        {{pricing.name}}