This article will introduce you to AngularJS and some important concepts to give you a basic idea. In recent years, pure JavaScript frameworks have grown in popularity. As you’ll see, many of the principles that were present in previous OO frameworks such as Java Struts and.NET MVC are also present in Angular. Model, View, and Controller (MVC) frameworks are well-known for their scalability in the development of large-scale, industrial-sized applications. The MVC concept is crucial to the Angular framework’s core architecture, and it will be discussed in the next section.
Architecture: Architecture models are scope objects in Angular. In conventional MVC, the model encapsulates the data that will be displayed by a View. Scoping is another way of saying “this is a container for this view.” The Controller is in charge of implementing the scoped logic. It handles the heavy lifting while sending the findings to the Model, which then passes them on to the View. The Model can be thought of as an interface, while the Controller is responsible for putting that interface into action. The implementation is further deconstructed by Angular, which is subsequently handled by Services. A service in Angular is a container for functionality that would otherwise be contained in a controller. This logic has been relocated off of the controller to avoid “fat controllers.”
Two-way binding: Two-way binding (TWB) means that when users fill out your forms, Angular will update their Model automatically or as needed. This intimate connection between input values and the Model’s associated variable representation simplifies data administration by eliminating the need to monitor user-driven events. For a long time, TWB has been used in OO language frameworks like Java Struts and.NET MVC. However, with JavaScript, the concept is new, and Angular is the first JavaScript framework to offer it, followed by a slew of other JavaScript frameworks that do the same thing after Angular.
Dirty Checking: You don’t have to utilize getter and setter methods to update your View data when using Dirty Dirty checking (DC) variable data (like you would in OO languages like C# or Java). Getters and setters are employed in such languages to create data encapsulation, thus your instance variables should not be directly accessible. Despite the fact that JavaScript is not an OO language, it makes sense to use DC variable data. However, in my opinion, it has an impact on the MVC architectural model because it is an OO-based model, and not enforcing data encapsulation weakens this architectural notion.
Dependency Injection: DI (dependency injection) is a difficult subject to comprehend. It’s a topic that deserves its own page (or book), but keep in mind that it has to do with injecting types at runtime. Because JavaScript isn’t a compiled language, it’s more natural for it to allow DI because objects’ identities may change during the script’s execution. DI is a dynamic Factory object that, based on the circumstances of a typical request, returns a specific type. You should be able to make this connection without issue if you’ve studied OO languages. Let’s pretend we have a factory called Animal, and we want to return cats, dogs, or rabbits. This may be accomplished using the Factory pattern. DI is similar, except it works in the opposite direction. We’d have to utilize a Factory to call the right method Object() [native code] by passing a variable to the Factory base class that tells us which function to return. This isn’t inherently a bad thing, but it does mean that the base class needs to be aware of all of the lower-level classes that inherit from it. When using DI, the base class does not need to know what classes are derived from it. What’s the best approach to go about it? To put it another way, an Interface is a link between derived and base classes. Because the behavior has been reversed, we now have dependence inversion.
Final Thoughts: In this article, you learned the fundamentals of the AngularJS framework. Understanding the basics is necessary for exploring and speeding up your Angular research. If you want to learn more about Angular JS, you can always look them up on YouTube. You may find a number of after-effect tutorials on YouTube. The only issue with YouTube is that it is difficult to learn new things quickly. The videos are not organized in any way.
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