Achieving Integration of External SDK with Angular: A Guide to Updating DOM Post SDK Async Calls

Currently, I am developing a client-side JavaScript SDK that simplifies requests to an external API.

However, there is one issue when using this SDK within Angular. Developers have to manually add $scope.apply() in order to update the DOM correctly.

SDK.getUser(function(response) {
            // This extra step of calling $scope.$apply due to SDK's asynchronous nature can be cumbersome 
            $scope.$apply(function() {
                    $rootScope.user = response.user;
            });
    }, function(error) {
            console.log('Error Fetching User From SDK: ', error);
    });

I am exploring ways to improve this situation. Is it possible to modify the SDK so that developers do not need to write $scope.apply() after each async call?

Could passing the $scope into the SDK and handling the apply internally be a feasible solution?

javascriptangularjs

Answer №1

Is there a way to customize the SDK so that developers using it do not have to manually call $scope.apply() after its asynchronous calls are completed?

An alternative approach would be to develop an angular service wrapper around the SDK service, eliminating the need for developers to worry about triggering the digest cycle themselves. Angular will automatically invoke the cycle once a promise is resolved and for each callback in the promise chain.

app.service('SDKWrapperService', ['$q',function($q){
  this.getUser = function() {
     var def = $q.defer();
     SDK.getUser(function(response) {
        def.resolve(response);
     },function(error) {
         def.reject('Error Fetching User From SDK: ', error);
    });
     return def.promise;
  }
}]);

You can use it like this:-

app.controller('myCtrl',['$scope','SDKWrapperService', function($scope, SDKWrapperSvc){
      SDKWrapperSvc.getUser().then(function(data){
         $scope.user = data.user;
      })
 });

Can I inject $scope into the SDK itself and handle apply internally?

It is not recommended to pass $scope into the SDK because it would create a dependency on client-side JavaScript SDK (non-angular) and tightly couple it with an angular implementation.

If your business logic is minimal, consider creating an angular version of the service using $http in your bundle for angular developers to utilize.

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