html <script src="angular.min.js"></script> <script src="angular-animate.min.js"></script> script var app = angular.module('myApp', ['ngAnimate']); html <div ng-class="{'animate-class': isAnimated}"></div> script app.controller('myCtrl', function($scope) { $scope.isAnimated = false; }); html <button ng-click="isAnimated = !isAnimated">Toggle Animation</button> css .animate-class { transition: all 1s; background-color: red; }