10 Mistakes to Avoid in AngularJS Mobile App Development

 

Using Nested ng-repeat Directive

Using an excessively extended JSON object running across several screens kills the performance of the app. Hence, an AngularJS mobile app developer should give preference to small individual JSON object. A proper JSON format, instead of, one derived from XML is recommended. Rely on lazy load or pull to refresh heavy listing whenever required.

 

Using $Scope

Prototype-based inheritance of Javascript is not the same as its class-based inheritance. However, this doesn?t raise much trouble to a mobile app developer. The only challenge that arises is with the functionality of the $Scope. Here, every $Scope emerges from its parent $Scope ($rootScope is the highlest level). And hence, sometimes, it becomes challenging to hide the property of the parent $scope.

 

Using as Server-Side Scripting

AngularJS is architectured to serve front-end app development needs, and should be used accordingly. Extending its usage to server-side scripting may not pay effective result, and must be avoided.

 

Using Too Many External Directives

External directives are also welcomed in AngularJS mobile app development process. However, pre-built directives are tested on multiple instances by the community members to ensure development of a bug-free app build. Hence, an AngularJS development team must try to make the most of them.

 

DOM Manipulation by Controllers

Controllers provide a launchpad to an AngularJS app. However, they should not distract DOM. Developers need to emphasize on confining the business logic of the app with the services, not with the controllers because unlike controllers that are temporary in nature, services persist through the app lifecycle.

 

MVC Directory Structure

MVC framework focuses on grouping files based on file types as given below:

templates/ _login.html _feed.html app/ app.js controllers/ LoginController.js FeedController.js directives/ FeedEntryDirective.js services/ LoginService.js FeedService.js filters/ CapatalizeFilter.js

But that may sound confusing to developers who are assigned with the app modernization task. Thus, it?s better to resort to group files based on respective features. This gives a clear understanding to the members of AngularJS mobile app development framework as which file to modify.

 

Modules Clutter

Maintaining a hierarchy of modules is important while working with a multi-module app. Well organized structure streamlines the connectivity among different levels or features of the apps and complement with enhanced user-experience besides easing and speeding up the development process. Hence, it's imperative for an AngularJS mobile app development team to organize modules based on types of objects or features they hold.

 

Related Blog: Top 15 AngularJS Web Development Tools Driving User Engagement

Underestimating Dependency Injection

Dependency injection is one of the best architectural practices that an AngularJS mobile app developer can make use of. It can be done by just passing the name of the dependency into the function for the module.

var app = angular.module('app',[]); app.controller('MainCtrl', function($scope, $timeout){ $timeout(function(){ console.log($scope); }, 1000); });

Here, it's very clear that MainCtrl depends on $scope and $timeout. Remember, this is no little favor to the app testing staff.

 

Service vs Factory

Factory and Service, in the parlance of AngularJS app development, both are synonyms. A developer should go through the glossary of the framework in advance. Watch

function factory(name, factoryFn) { return provider(name, { $get: factoryFn }); } function service(name, constructor) { return factory(name, ['$injector', function($injector) { return $injector.instantiate(constructor); }]); }

Note:service just calls the factory function, which in turn calls the provider function. value, constant, and decorator are additional wrappers of the provider function.

Too Many Watchers

Inclusion of too many watchers in the digest cycle is also detrimental to the app?s performance. According to experts, one should not let the number exceed the 2000 mark. Thankfully,  AngularJS 1.3 brings an answer to it. Developers can now keep a check over digest cycles.