With a wealth of frameworks and libraries available in the JavaScript world, it has become increasingly complicated to choose the best technologies for developing data-intensive applications. What hasn’t changed are schedule pressures. In order to keep up, you need tools that don’t leave you rewriting everything from scratch.
Software is also now strategic and enterprise in scale. In order to take advantage of agile development and testing methodologies, software must be designed to be modular and must be well-structured to reduce maintenance and change costs. JavaScript libraries and tools provide these attributes.
The likelihood of schedule achievement is dramatically improved by adopting frameworks and components that are prebuilt so that the developer can focus on the value-add of their own application. Without having to create specialized, difficult-to-code user interface components, time to delivery and deployment is reduced. And without having to create specialized mobile applications in difficult-to-learn languages, those become a natural part of the enterprise development workflow.
One of the more popular JavaScript technologies in use by professional developers is Angular, an open source front end web framework created and maintained by Google. The first version of Angular is now called AngularJS (also known as Angular.JS). Angular was designed specifically to tackle so-called “single-page-applications (SPA)”, a type of web page that keeps the same basic page on the screen and just updates (modifies, changes) certain information based on user input and data flow, rather than re-loading all of a particular web page on changes. Angular (and AngularJS) is older than React and is the second most popular JavaScript framework. However, Angular can have a relatively long learning curve as it is a complete development framework.
Angular supports TypeScript, which for many developers turns JavaScript from a relatively unstructured weakly-typed language into a language where the data type is checked to make sure things like “1” and “1.000001” are not the same number. Using TypeScript creates a situation where the computer finds casting errors much easier, instead of users finding these during execution or run-time.
Using TypeScript with Angular also gives the programmer the option of coding in a class-based Object-Oriented Programming paradigm, and is a superset of ECMAScript 6 (ES6), while being backwards compatible with ECMAScript 5 (i.e. JavaScript). Angular also includes ES6’s Arrow functions, iterators, For/Of loops, python-style generators, reflection, dynamic (page) loading, asynchronous template compilation, and allows code to be executed on either the client browser or the server using the Universal State Transfer API and DOM. With this new design, code can be shared between the server and the client, which can improve performance.
Like React, Angular offers two-way data binding and both MVM (Model-View-Controller) and MVVM (Model-View-View-Model) code organization capabilities. Bidirectional binding minimizes the risk of errors and enables a singular behavior of the app. For MVVM design patterns, it has the capability of allowing developers to work separately on the same app section with the same set of data.
Angular has become extremely widespread and, along with Node.js, React, and other frameworks, has cemented itself as a key technology for enterprise developers such as Google and many others.
Angular is often the choice of large enterprise developers specifically because it is a real framework, uses TypeScript and hence enforces strong typing to try to prevent run-time code blow-ups, and is especially designed for popular single-page applications (SPA). It is inherently more performance savvy than other frameworks in part due to limited updating capabilities (only change what needs to be changed rather than a complete page reload).
From a performance standpoint, another key feature is the Build Optimizer. Like a good optimizing compiler, this removes all unnecessary runtime code, reducing application size and improving performance.
Angular uses improved hierarchical dependency injection. This technique abstracts actual components from their dependencies by running them in parallel to each other. Angular builds a separate tree of dependency injectors that can be altered without reconfiguring the components. Therefore, classes don’t have dependencies in and of themselves, but rather consume them from the external source.
One of the most important aspects of Angular is its Progressive Web Applications (PWA) capabilities. If you want to build apps that look like native applications across mobile or tablet, or desktop, Angular includes this capability. In other words, Angular applications can look a lot like desktop PC, Macintosh, or Linux applications. Not only is the look and feel good, the resulting application performs more or less like a native desktop application. No one wants to build applications for the desktop only to have them run poorly (slowly, or with broken UI elements), and Angular solves this problem.
A programmer/developer chooses Angular because they need to create sophisticated, data-intensive, responsive user interfaces quickly, they care about mobile platforms, and usually they work in either an enterprise environment where strong typing is required, or they are delivering customer-facing sophisticated single-page applications. But what about the components? If you want to save development time using pre-built components, that’s where ExtAngular comes in.