Nowadays, I wanna provide an interesting topic about how to upgrade from AngularJS to Angular. To my mind, this article is exactly what you need if you have already thought about the migration of your app. I believe you’ve been looking for this information for a long time. So, I decided to give you in this topic the definitions of AngularJS and Angular. In today’s topic, I will try to disclose as much information as possible about upgrading from AngularJS to Angular. I will picture the concept of this service, how it works, and what it suggests.
Let’s don’t waste time and examine this in a little more detail.
Contents
Upgrading from AngularJS to Angular
First of all, I want to say what Angular is. Angular is the name for the Angular of today and tomorrow. As for AngularJS is the name for all versions of Angular. It strikes me that AngularJS apps are great. Some applications will be easier to upgrade than others, and there are several ways to make it easier for yourself. It is possible to prepare and follow AngularJS applications with Angular even before beginning the upgrade process. Also, these preparation steps are all about making the code more decoupled, more maintainable, and better arranged with modern development tools. That suggests in addition to making the upgrade easier, you will also develop the existing AngularJS applications.
One of the keys to a successful upgrade is to do it incrementally, by running the two frameworks side by side in the same application and porting AngularJS components to Angular one by one. This makes it possible to upgrade even large and complex applications without disrupting other businesses.
Preparation
As you can see there are many ways to structure AngularJS applications. When you start to upgrade these applications to Angular, some will turn out to be much easier to work with than others. There are a few key ways and patterns that you can apply to future proof apps even before you begin the migration.
Follow the AngularJS Style Guide
Angular is a reimagined version of the best parts of AngularJS. There’s a lot more in Angular than just that of course but this does mean that the following style guide helps make your AngularJS app more closely aligned with Angular. I want to suggest several rules, in particular, that will make it much more comfortable to do an incremental upgrade while making the upgrade in Angular 2+.
Rule #1 says that there should be one element per file. Many studies have shown that this not only makes parts simple to operate and find but will also allow us to transfer them between languages and frameworks one at a time. It is clear from the facts that all controller, component, setting, and the filter is in its source file.
Rule #2 says that the Folders-by-Feature Structure and Modularity rules define related systems on a greater level of abstraction: various parts of the application should reside in different lists and modules.
As you can see, I introduced to you two rules that you can follow according to the AngularJS style guide. Next, let’s talk about a full guide to upgrading from AngularJS to Angular.
A full guide to upgrading from AngularJS to Angular
One of the most striking things of the topic is upgrading from AngularJS to Angular. So, let’s follow a few steps:
Initialization
Needless to say that many articles say before you start migrating to Angular that you need to give the build of the AngularJS application to Webpack. You must admit that such a task is quite time-consuming and ready to stall the work significantly. It is generally accepted you can initialize a hybrid app in no time. After all, you have a great tool Angular – CLI and a well-thought build of the Angular project.
Service Transfer
You must remember that the service transfer is the simplest of all the steps for migrating to Angular. Having written a new service in Angular, you can simply connect it to AngularJS components of your application. ngUpgrade gives a very useful tool to achieve this purpose.
It would also be interesting to see so, when the service is available to be used inside AngularJS, no additional settings are required. It appears rather seldom that you must use the AngularJS service in Angular, and you haven’t upgraded it yet. That’s all right! You may carefully connect it to the relevant module through the company. Now you can work with the AngularJS service inside the Angular framework. I personally feel that it is a lot simpler.
Element Transfer
You can use the Angular element in the AngularJS part of the application using the downgrade elements function. It’s pointed at creating a helper directive which provides the Angular component to be ready in AngularJS. Migrating the AngularJS components to the new Angular app is a slightly more complicated process than migrating services. If, say, your element uses ng-include or ng-transclude, you won’t be able to transfer it as it is. You’ll have to rewrite it a little bit.
Routing
On the whole, I think quite a lot of existing AngularJS plans take advantage of a-router to create routing within the application. I want to say that in this case, there are no difficulties in the implementation of composite routing. Also, you can see when part of the programs is declared in the AngularJS coverage area, and some of them are in the Angular coverage area. You can achieve complete communication using a hybrid UI-router which allows you to complete work with the request routing.
So, from my point of view now there are more and more Angular app examples, and developers are continuing to migrate AngularJS to Angular. Fortunately, the task is very helped by a good toolkit which guarantees constant development.
Conclusion
To conclude, in this topic “How to Upgrade from AngularJS to Angular” you have received some information about a full guide for upgrading from AngularJS to Angular. Here are a few steps:
- Initialization
- Service transfer
- Element transfer
- Routing
I hope I have prepared a useful and appealing topic that will come in helpful in the future.
Thanks for your attention and stay safe! I wish you good luck today!