Asynchronous flow angularjs (promises)

var app = angular.module('plunker', []);

app.controller('MainCtrl', function($scope,$http) {

 var getJoke = function(){
   return $http.get('http://api.icndb.com/jokes/random').then(function(res){
    return res.data.value;  
   });
 }
 
 getJoke().then(function(res){
   console.log(res.joke);
 });
 
});

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>
    document.write('<base href="' + document.location + '" />');
  </script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.20/angular.js" data-semver="1.3.20"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    
  </body>

</html>

/* Put your css in here */