Angular is a widely known TypeScript-based frontend framework used to construct scalable single-page purposes. Though new frameworks like React have taken over frontend improvement, Angular remains to be the most effective frameworks to start out a brand new web-based undertaking.
I have been working with Angular for a big interval, and it has some nice options with fixed updates. Nonetheless, Angular just isn't a silver bullet. It has some important drawbacks and challenges that carry nightmares to builders.
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Personally, I've additionally confronted a few of these nightmares when utilizing Angular. As everyone knows the spooky season would not finish with Halloween, so I believe this can be a good time as any to share them with you. So, on this article, I am going to share my Angular nightmares, those that make my pores and skin crawl.
Definitely, that is the largest nightmare of any Angular developer. However earlier than discussing it, let us take a look at the Angular model historical past.
AngularJS is the preliminary model of Angular, launched in 2010. Then, the Angular staff waited six years for a significant launch and launched a brand new model of Angular named angular 2 in 2016. After that, we obtained 11 main updates from Angular, from Angular 4 to Angular 14 (Angular did not launch a model as Angular 3). After we evaluate these variations' variations, the largest and most important change was between AngularJS and Angular 2. AngularJS is a JavaScript-based framework, whereas all of the later variations are based mostly on TypeScript. As well as, newer variations have many options like dependency injection to make builders' work simpler.
Between 2010 and 2016, many corporations opted to make use of Angular for his or her purposes. As soon as the newer variations had been launched, most corporations determined to stay to AngularJS whereas some revamped their utility with new variations. However, as time handed, it grew to become tougher to keep up AngularJS purposes as a result of lack of updates, third-party library assist, and developer pursuits. So, the necessity to migrate grew to become important for a lot of purposes.
There are three approaches we are able to use emigrate from AngularJS to Angular:
- Rewriting the applying.
- Updating the prevailing utility.
- Following a hybrid mannequin.
Rewriting the Utility
Rewriting an utility is sort of equivalent to creating a brand new utility. This highway is taken when the previous utility has outdated libraries, design ideas, or design patterns. In such instances, making an attempt to replace the applying will probably be extra difficult than creating a brand new utility.
Nonetheless, rewriting an utility can take a big quantity of effort and time out of your improvement staff. Therefore this method just isn't appropriate for large-scale purposes. Alternatively, rewriting the applying gives you the flexibleness and freedom to organise the codebase as you like. Additionally, you should utilize fashionable utility improvement ideas and designs within the new utility.
Updating the Present Utility
Updating the prevailing utility is the best method to migrate from AngularJS to Angular. You should utilize this method to any scale utility, and it'll not take as a lot effort and time as rewriting. However updating would not provide the similar flexibility as rewriting so as to add fashionable ideas.
As well as, you want to divide the applying into elements and regularly replace whereas testing to make sure all of the functionalities are working as anticipated after the replace. This method is most fitted for large-scale purposes, since rewriting them can take ages.
Following a Hybrid Mannequin
Updating or rewriting an utility requires builders to place in further effort or delay any ongoing implementation since they should concentrate on the migration. However, generally, the organisation or the shoppers cannot afford to delay new implementations or rent a separate staff for the migration. In such conditions, you will should comply with a hybrid mannequin.
Within the hybrid mannequin, it's important to maintain the previous AngularJS code with none change and implement new modules utilizing a more moderen Angular model. In comparison with the opposite 2, this method will take considerably much less configuration time. Nonetheless, you will have to keep up separate libraries, particularly configure issues like routing, styling, and translations for each Angular variations.
As you may perceive, there is no such thing as a good migration methodology. Earlier than making a choice, it's important to think about the benefits and downsides of those approaches, undertaking necessities, timeframe, consumer considerations, and lots of different issues. That is why migrating from AnguarJS to Angular has develop into such a nightmare for builders.
Utilizing third-party JavaScript libraries is one other problem we face when utilizing Angular. Since Angular makes use of TypeScript, it is important to contemplate the compatibility between the library and the code base earlier than utilizing it. Nonetheless, most libraries now assist TypeScript and supply one other model of the identical library named @varieties. For instance, if we think about the node library, it has one other model named @varieties/node with TypeScript compatibility.
However generally, there generally is a particular library you want to use which does not present a TypeScript-compatible model. You could manually deal with such conditions by creating an area declaration. Putting in an unsupported library with out making an area declaration could cause sudden errors within the utility. You would possibly spend important time resolving these errors with out figuring out the basis trigger.
So, we should pay further consideration when working with third-party JavaScript libraries in Angular. There are 3 ways to create an area declaration, and I'll briefly clarify them to offer you a greater understanding.
1. Including to index.html
Embody the library within the index.html file utilizing a script tag.