ReactJS Training in Tiruchirappalli

Pros of ReactJS:

Virtual DOM in React makes the user experience better and developer’s work faster:

• DOM (document object model) is a logical structure of documents in HTML, XHTML, or XML formats. Describing it in layman’s terms, it is a viewing agreement on data inputs and outputs, which has a tree form. Web browsers are using layout engines to transform or parse the representation HTML-syntax into a document object model, which we can see in browsers.
• The main concern about traditional DOM construct is the way it processes changes, i.e., user inputs, queries, and so on. A server constantly checks the difference caused by these changes to give the necessary response. To respond properly, it also needs to update the DOM trees of the whole document, which is not ergonomically valid because DOM trees are fairly large today, containing thousands of elements.
• The team behind React managed to increase the speed of updates by using virtual DOM. Unlike other frameworks that work with the Real DOM, ReactJS uses its abstract copy-the Virtual DOM. It updates even minimalistic changes applied by the user but doesn’t affect other parts of the interface. That is also possible thanks to React components isolation, which we’ll get to in a minute, and a special data structure in the library.
• This makes updates really quick, allowing for the building of a highly dynamic UI. We can notice it writing in Facebook chat and seeing a simultaneously updating news feed. Moreover, in React, developers don’t have to bind DOM to functionality in the front-end because React elements are already connected to it.
• The approach enabled developers to work with UI-objects faster and use hot reloading (applying changes in a real-time mode). Not only did it increase performance, but it also made programming faster.

Permission to reuse React components significantly saves time:

• Another advantage that Facebook introduced with React is the ability to reuse code components of a different level anytime, another meaningful time-saving effect.
• Think of designers. They constantly reuse the same assets. If they didn’t, they’d have to draw corporate logos, for instance, over and over again. It’s pretty obvious: Reusing is a design efficiency. In programming, this process is a bit more difficult. System upgrades often turn into a headache as every change can affect the work of other components in the system.
• Managing updates is easy for developers because all React components are isolated and change in one doesn’t affect others. This allows for reusing components that do not produce changes in and of themselves to make programming more precise, ergonomic, and comfortable for developers. Check this guide by Alex Grigoryan from WalmartLabs on how to achieve efficient code reusability with ReactJS.

One-direction data flow in ReactJS provides a stable code:

• React allows for direct work with components and uses downward data binding to ensure that changes in child structures don’t affect their parents. That makes code stable.
• Most complex view-model systems of JS-representation have a significant but understandable disadvantage – the structure of data flow. In the view-model system, child elements may affect the parent if changed. Facebook removed these issues in React, making it just the view system.
• Instead of using explicit data binding, ReactJS uses one direction-downward-data flow. In such a structure, child elements cannot affect parent data. To change an object, all a developer needs to do is modify its state and apply updates. Correspondingly, only allowed components will be upgraded.

An open-source Facebook library: constantly developing and open to the community:

• React was one of the first JavaScript-connected projects released as open-source by Facebook. That means that ReactJS uses all advantages of free access-a lot of useful applications and additional tools from off-company developers. Facebook’s Pete Hunt says that at least two main features-batching and pruning-were created by developers that noticed the project on GitHub. Now ReactJS is 5th in Trending on GitHub with over 152,000 stars. And, there are more than 1400 open-source contributors working with the library.

Redux: convenient state container:

• Before writing an angry comment that Redux is framework-agnostic and you can happily use it with Angular or Vue and that it isn’t exclusive to React whatsoever, please note that we know that. However, it’s worth mentioning Redux here simply because the tool is considered to be every-React-engineer’s must-learn instrument applied in 50 to 60 percent of React apps. Yes, you can use Redux with Angular, but the probability of a React developer knowing Redux is much higher than knowing Angular. And you’ll find more community support for tackling the React-Redux learning curve. So, why is it good?
• Redux simplifies storing and managing component states in large applications with many dynamic elements where it becomes increasingly difficult. Redux stores application state in a single object and allows every component to access application state without dealing with child components or using callbacks. For instance, when you have two components that share the same state (like detailed and general views on the image below) and stand apart in the tree, without Redux, data has to be passed through multiple intermediary components with all the problems that go with it.
• Redux provides a centralized data store object to allow these components directly access it.
• Additionally, as states become more manageable, the application is easier to test and log data changes. Also, the tool enables hot reloading that we mentioned above and many other useful actions. You can learn more about Redux in the Understanding Redux book by Ohans Emmanuel.

React Hooks: an improved state management

• Before early February 2019, React developers had only two ways to specify state: Define a local state in the component or use a state management frameworks like MobX or Redux to establish it as a global state.
• React introduced its Hooks API in its 16.8 release. The greatest Hook’s asset is that it allows sharing state logic between components without rearchitecting the whole code block. Along with that, Hooks permits the reuse of logic between components without changing its structure. It also enables separating a specific single component into several smaller functions, based on the roles these pieces refer to, instead of breaking them according to their lifecycle methods. What’s equally important for developers, Hooks saves them from writing classes for each component and digging deeply into the JavaScript theory, while still allowing the use of all React perks.

Wide React and Redux toolset

• Both React and Redux come with a decent set of related tools that make a developer’s life easier. For instance, React Developer Tools extension for Chrome and a similar one for Firefox allow for examining component hierarchies in the virtual DOM and editing states and properties. Additionally, you can check React Sight that visualizes state and prop trees; Reselect DevTools that helps with debugging and visualizing Reselect, a selector library for Redux. Redux DevTools Profiler Monitor allows for profiling actions in well... Chrome DevTools. And there are many more to try.