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Modern JavaScript Applications

Modern JavaScript Applications

By : Narayan Prusty
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Modern JavaScript Applications

Modern JavaScript Applications

5 (1)
By: Narayan Prusty

Overview of this book

Over the years, JavaScript has become vital to the development of a wide range of applications with different architectures. But JS moves lightning fast, and it’s easy to fall behind. Modern JavaScript Applications is designed to get you exploring the latest features of JavaScript and how they can be applied to develop high-quality applications with different architectures. Begin by creating a single page application that builds on the innovative MVC approach using AngularJS, then move forward to develop an enterprise-level application with the microservices architecture using Node to build web services. After that, shift your focus to network programming concepts as you build a real-time web application with websockets. Learn to build responsive, declarative UIs with React and Bootstrap, and see how the performance of web applications can be enhanced using Functional Reactive Programming (FRP). Along the way, explore how the power of JavaScript can be increased multi-fold with high performance techniques. By the end of the book, you’ll be a skilled JavaScript developer with a solid knowledge of the latest JavaScript techniques, tools, and architecture to build modern web apps.
Table of Contents (16 chapters)
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15
Index

Angular 2 change detection


Change detection is the process of detecting component state change. The state of a component is stored and manipulated using the this keyword. Therefore, there is no direct way for Angular 2 to detect when the state changes. So, Angular 2 uses complex algorithms and third-party libraries to detect state changes.

The first thing Angular 2 does for detecting state changes is that it pretends that all the changes happen asynchronously. Then, it uses the zone.js library to monitor browser events, timers, AJAX requests, WebSockets, and other asynchronous things that are supported by zone.js.

Now, whenever any of these asynchronous activities takes place, it checks everything that could change, including object properties and array elements of the this keyword of all the components from the root node; if any change is detected, then the template bindings of the component are updated. Angular 2 doesn't simply re-render the whole component. Instead, it checks for the bindings...

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