Table of Content
- 1.New things to look out for in Angular v15:
- 2.Reasons to upgrade from AngularJS to Angular15:
- 3.Key Points in Angular Migration
Angular has been a comprehensive solution for front-end development that does not require any extra plugins or frameworks. It is a leading platform capable of providing a satisfactory user experience through appealing user interfaces.
But why is it preferred by so many experts? Its ability to design complicated and interactive applications, such as single-page web apps or mobile apps quickly and easily remains the key reason. Moreover, its reactive programming features and template-based syntax make it so simple that even a newbie may grasp it quickly.
Angular has a large and active community to assist experts in resolving their queries. They make semi-annual releases with enhanced features that help to simplify custom software development
Angular 15 is the most recent release, and it has introduced some significant improvements. Let’s dive further and examine what’s new in this version.
New things to look out for in Angular v15:
The latest version of Angular has introduced numerous improvements and new capabilities. We've also gained optimization for older features released in Angular 14 or before. Here are the new features that are included in Angular version 15.
Standalone Components API:
Standalone components APIs allow the developer to build their Angular applications or projects without the need of defining NgModules. The introduction of standalone component APIs in Angular 14 was a great feature but lacked stability. Now that the feature has been thoroughly examined, tested, and improved, it has become more stable. Developers can use standalone APIs to start an application with a single component. Also, in Angular 15 the standalone APIs work across the Angular board. Meaning it works properly with routers, HttpClient, Angular Elements, and more.
Directive Composition API:
One of the major demands of the developers was something that allows them to reuse their directives. Most developers choose frameworks that have tools for reusing UI logic. The user interface (UI) is a crucial component of the web development process, and the latest Angular release has introduced the Directive Composition API, which allows for easy reusability. The directives may now be incorporated into the host components, making reusability in big projects very simple and effective. This saves a lot of time when developing a large-scale project where designs need to be reused.
Angular 15 also brought along router standalone APIs. Developers will be able to design a multi-routed application by simply employing the new APIs. You can easily assign the routes to it by first using it to load the root component and then directly allocating all of the routes in the root component. The bundlers will also remove all the unused or unnecessary features at build time, causing the size of the package to reduce in the final application bundle.
Image Directive stability:
The image directive is now production ready. The directive NgOptimizedImage is something that was introduced in Angular 14. Although valuable, it was not entirely polished to the state where we could utilize it in Angular 15. There are new additions or adjustments to the input names as well. The input rawSrc is now ngSrc, and the input rawSrcset is ngSrcset. The use of ngSrcset can help reduce the time taken for the images to be downloaded. The directive now includes a new input called "fill," which replaces the height and weight attributes. It is a Boolean input that is used as an inline style, forcing the image to be filled in its immediate parent container.
Functional router guards:
The use of functional routers is very useful as it helps reduce the extra boilerplate code. We can simply call or inject functions instead of using the older method of describing the service into a function and invoking that function. We can simply use the inject() method and add our service and the function of the service that we want to use. This cuts down a lot of extra code and makes it very easy to add authentication on routes in our application.
Cleaner Error stack traces:
The new update improves the appearance of the faults. In prior Angular versions, the error that was thrown merely displayed the library where the problem occurred, which increased debugging durations for developers at times. With the updated Angular 15 it will show a more precise location of the error by tracing the development code rather than just showing a list of libraries, reducing the time needed to locate and resolve the error.
Stable MDC Components:
A lot of the Angular 15 update is about stability. Adding to the list is the stability update to MDC components. The team has focused on making sure the MDCs used for designing Angular applications are improved in terms of accessibility. There are other changes as well in terms of DOM and CSS rule changes that might affect older applications.
Automatic imports using Language Service:
Now the developers can write lines of code without worrying about importing their components in templates. This is a minor yet convenient update for developers.
Reasons to upgrade from AngularJS to Angular15:
AngularJS was not made for mobile application development. This can cause stiffness in development as there is no flexibility. With Angular, you can utilize Ionic or other frameworks to develop your mobile applications.
The material components that we use in UI are introduced in Angular 5 whereas in AngularJS you could not do that. The MD components provide a breath of fresh air to Angular web applications with their sleek and smooth animations and functionalities.
The framework of AngularJS is not as well structured as Angular. The structure of Angular focuses on component-based data exchange. It is more secure and manageable on a larger scale.
Although AngularJS has great speed, Angular 6 introduced Ivy, which allows for quicker debugging, compilation, and reduced package size. This helps out developers and is better for them when compared to AngularJS.
AngularJS uses the MVC architecture while Angular has a component-based architecture that can adapt to multiple other types of architecture based on use.
Support and Community:
As a developer there are times when you seem to get stuck on a possible error or issue. This can be resolved by looking online for similar issues occurring to other developers and how they resolved them. With Angular, you get a bigger community of developers as it is more up-to-date and modern compared to AngularJS.
Key Points in Angular Migration
Now, the move from AngularJS to Angular might seem easy as the names are similar but in actuality, the move can have a major impact on your project. There should always be proper planning before initiating the migration process from AngularJS to Angular. Some of the following points might help you in your migration process:
Writing your code from scratch:
We can always use the conventional method of writing our code again from scratch. We will have our existing code to use as a reference and the older project is also up and running. The cons of this approach are that it will take a lot of time and resources. The project codebase will get upgraded but the process will be exhausting.
The use of ngUpdate is also advised as you can go for a more hybrid approach while writing your new codebase or updating your older codebase. We can simply use this command in the terminal and update to a more stable version of Angular.
We can use a hybrid approach by adding both AngularJS and Angular routers to our project. The other approach is preferable when we want to rewrite the whole code from scratch and that is switching routers.
Angular 15 can be a powerful and flexible choice for building modern software applications. Angular also has a robust ecosystem, with a huge and active developer community that contributes to the framework and creates extra tools and resources. This can make it easy to obtain help and assistance when using Angular.
Angular 15 is a full-featured framework with a plethora of built-in features and capabilities, such as dependency injection support, a robust router, and a variety of testing and debugging tools. It is the most current release that has made substantial improvements. The blog has gone over the most current features added to Angular v15 in great depth. Although it is the best choice for migration in the end it all boils down to what fits your project and use case the best.