In this article, I’m going to give you a basic angular introduction overview of a very popular and widely used client-side framework called Angular. In this basic Angular introduction, mostly aimed at beginner level developers who have little experience with JS frameworks and want to learn the basic idea behind Angular as well as understand its differences from AngularJS.
So, let’s move toward Angular introduction, shall we?
Why Do I Need a Framework?
Now a day most JS frameworks are opinionated, meaning they have their own philosophy of how the web application should be built and you may need to spend some time to learn the core concepts behind JS. Other solutions, like Backbone, do not guide developers on how they should craft the project, thus some people even call such technologies simply libraries, rather than frameworks.
Basic Angular Introduction: What Angular Actually Is
Another quite important thing was Dependency Injection, which allowed application components to be wired together in a way that facilitated reusable and testable code. Of course, there’s much more to AngularJS, but we’re not going to discuss it thoroughly in this article.
AngularJS became popular very quickly and received a lot of focus from developers. Still, its creator decided to take another step further and proceeded to develop a new version which was initially named Angular 2 (later, simply Angular without the “JS” part). It’s no coincidence the framework received a new name: actually, it was fully re-written and redesigned, while many concepts were reconsidered.
The first stable release of Angular 2 was published in 2016, and since then AngularJS started to lose its popularity in favor of a new version. One of the main features of Angular 2 was the ability to develop for multiple platforms: web, mobile, and native desktop (whereas AngularJS has no mobile support out of the box).
Then, to make things even more complex, by the end of 2016, Angular 4 was released. “So, where is version 3?”, you might wonder. I was asking the same question, as it appears that version 3 was never published at all! How could this happen? Angular Team decided to stick with the semantic versioning since Angular 2.
Following this principle, changing the major version (for example, “2.x.x” becomes “3.x.x”) means that some breaking changes were introduced. The problem is that the Angular Router component was already on version 3. Therefore, to fix this misalignment angular team was decided to skip Angular 3 altogether. Luckily, the transition from Angular 2 to 4 was less painful than from AngularJS to Angular 2, though many developers were still quite confused about all this mess.
Angular 5 was released in November 2017. It is also backward compatible with prior Angular versions. Angular 6 was then released in May 2018, In this major release focused less on the underlying framework, and more on the toolchain and on making it easier to move quickly with Angular in the future. Angular 7 was released in October 2018. This release contains new features for our toolchain and has enabled several major partner launches.
Reference: Angular Introduction: What It Is, and Why You Should Use It