How to Build Great Angular JS Applications
AngularJS stands as one of the leading JavaScript frameworks for client-side development. Through reviewing some AngularJS concepts including two-way data binding, $scopes and directives, we have come across some great ways for creating amazing AngularJS apps. In essence, AngularJS stands as the leading JavaScript framework for client-side coding. AngularJS offers MVC-based architecture for creating SPA (Single Page Application).
The key features offered by AngularJS web development include built-in dependency injection, 2 way data binding, and templates created with HTML along with different facilities for unit testing of each component in an app.
AngularJS $scope Objects
Scopes stand as the objects related to different controllers and are shared with various views. They serve as the basis for 2 data binding for AngularJS. A hierarchical structure of $scope objects along with $rootScope as root exist that uses JavaScript prototypal inheritance for children.
You should remember that you can create a big mess through data that you create and read from scopes. You can keep scopes within control through using “Controller as” syntax. In addition, you should store a model object in scopes, rather than storing data directly. Also, you should ensure that an AngularJS development company always uses a dot at the time of accessing data – “Controller as” syntax can assist you in this matter.
2 Way Data Binding
2 way data binding in AngularJS stands as the most coolest feature. Several changes in model are viewed automatically and amendments among view are brought into models. AngularJS runs severe checking of different values to fire change events, versus change listeners belonging to different frameworks. It means checking if a various among scopes has changed, among cycles known as digest cycles.
To improve an app performance, you can avoid using complex AngularJS expressions. AngularJS expressions can be evaluated for many times. Also, an AngularJS web design company can make use of 1 time binding expressions whenever possible. Moreover, AngularJS web page design service can utilize $watchCollection over $watch along with 3rd parameter for observing arrays and objects. Also, companies tend to hire AngularJS developer who avoid ng-repeat where possible.
Directives of AngularJS
AngularJS directs stand as a great way to enable a developer to extend HTML. A developer can build reusable DOM elements that can be shared across an application. At the time of working on an Angular JS application, you should not manipulate or access DOM across controllers. You can utilize directives for DOM manipulation.
Moreover, directives can be utilized as element names, class names, attributes, and comments. Also, you can restrict a directive to an element name or attribute, making it easier to find matches between different directives and DOM elements. In addition, you must take care of staying updated with recent releases of AngularJS. The handy features are released regularly.
You can make an upgrade easier through avoiding obsolete directive format and using ng-xyz or data-ng xyz formats. Also, others are supported for legacy reasons only and could not be supported in upcoming releases. In addition, you can replace $http deprecated functions, error, success, through then function. Moreover, you do not need to access scope properties starting with $$, as AngularJS naming convention confirms that they are private properties.