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Angularjs $q.all Example - Jquery

Angularjs $q.all Example - Jquery

What is $q promises in angularjs?

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Angularjs promise is used to view the the built-in $q service. $q.all is a service which helps you to run function asynchronously and use their return value after they processed. The sample code using $q promises in angularjs is given below.

<script src="http://code.jquery.com/jquery-1.9.1.js"></script> <script src='http://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.1/angular.js'></script> <script> function PromiseCtrl($scope, $q, $timeout) { var getPromise = function(delay) { var deferred = $q.defer(); $timeout(function() { if(delay > 0) { deferred.resolve("Success"); } else { deferred.reject("Fail"); } }, delay); return deferred.promise; }; $scope.result = "Waiting"; $q.all([ getPromise(1000), getPromise(2000), getPromise(3000) ]).then(function(value) { $scope.result = value; }, function(reason) { $scope.result = reason; }); } </script> <div ng-app> <div ng-controller="PromiseCtrl"> {{result}} </div> </div>

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