AngularJS Application Best Practices
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Ashish Sharma

So what is AngularJS?

AngularJS Application

Since you are here, I am assuming that you have an idea about what AngularJS is and what you want to use it for. Even if you are not aware of it, don’t worry! This article will help you in understanding the AngularJS Framework and will guide you to the best practices you can follow to make a good AngularJS Application.


A brief about Angular

It is an open source framework developed by Google in 2009 with the objective of simplifying the structure of JavaScript code which is usually used in developing in the dynamic web applications. Angular JS is relatively new to developers, but it is easy to use as it simplifies the development process by providing everything a developer requires while coding in JavaScript for a dynamic web app. The key concept of AngularJS is that it allows binding the data to HTML and auto injection of the majority of the code preventing the common errors while writing the code.


The other benefits of using AngularJS Framework are:

  1. ·Provide directives for extending the HTML Attributes
  2. Leave scope to control variables
  3. Allow two-way data binding
  4. Rendering of HTML is easier
  5. Provides Event-handling such as mouse click or key press
  6. Provides inter-relationships of components to satisfy the user specific requirements
  7. Allow Unit testing to check whether the source code, modules, data are fit for use
  8. Provide Model-View-Controller (MVC), the link between a user and the system
  9. Provide other Services to simply the coding process
  10. Easy Routing

Things to keep in mind while developing an AngularJS Web Application

  • Working on the Directory Structure

The first step when you start working on a framework is to manage the files together. AngularJS makes it hassle-free to group the files based on the file type.
The default directories that AngularJS provides will be good enough for the smaller projects. However, for lengthy projects you may need to restructure the directory so that you can you can kind the files easily. AngularJS provides options of making changes in the directory pattern, which makes this framework completely user friendly.

  • Using the AngularJS Injector

The Dependency Injector tool of AngularJS manages the creation, availability and requirement of the components. As the name suggests, the tool or the process of Dependency Injection helps in resolving the dependency of the components on each other by providing the available components as and when required.
The Dependency injection also makes the testing simpler as it allows us to simply create the same components with the dependencies and testing the outcome without affecting the main application. It allows changing the code (dependencies) in the background for testing which makes it an essential requirement for enterprise-level application where several developers work on the same solution.

  • Modularizing the Application

This refers to organizing the application through different modules or containers. Each module will contain some part of the application like controllers, services, directives etc.

Arranging these parts in separate modules in such a way that they can be used without the need of dependencies is the best way to organize the components. Additionally, these modules will be reusable across different apps.

  • Proper use of Scope

There are 3 simple rules to follow regarding the scope in AngularJS

  1. Write-Only Scope in the Controllers - Controller will be writing the data in an object of the scope by using another component to extract the data from the template.
  2. Read-Only Scope in the Templates - Though AngularJS allow to write the code for modifying the scope in templates, it is advisable not to do so and let the controller do the writing by extracting the data from the template.
  3. Creation of Properties in the Object - It is often misunderstood that scope is the key component in AngularJS whereas it must be a JavaScript Object. Scope is simply a way to bind our model with the template. Hence, properties must be created inside the object.

  • Testing the AngularJS Output

Testing is the ultimate part of developing an application. There are many options as in tools available to test your JavaScript code. Since, AngularJS is developed and supported by Google, the safest and most commonly used tool is the Google Chrome extension ng-inspector.

The tool performs debugging, reviewing, testing and determining any error in the code. It also does the tracking of the scope allowing you to view the elements attached to it.

Other AngularJS Specific Testing Tools are:

  1. Karma
  2. Protractor
  3. Jasmine
  4. Mocha.js

CONCLUSION

These five best practices may not provide a clear view about the development using AngularJS but they are pretty useful. Adapting these for the development will lead to a well-structured application which will be high in efficiency and performance. I hope that if nothing, this article must lay a good foundation for creating your own AngularJS Web Application by improving your knowledge and skills in AngularJS framework. Rest; always keep in mind that such practices may vary upon the size and type of the application, the business it is required for, and other different factors. We wish you all the best for your first AngularJS application development.

About The Author

Ashish Sharma

Ashish Sharma is the Chief Marketing Officer at WeDigTech, a Mobile App Development Company in LA California US. He is responsible for marketing activities that have to do with creating, communicating and delivering offerings that have value for clients or business partners.

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