Web development is the task of building a practical website that can be browsed using any web browser that has been installed in a computing device such as a personal computer (PC) or mobile devices like smartphones, tablets, or iPad.
In most responsive websites, there are interactive elements that are used to display dynamic web content.
Dynamic web content is the customized content that the website displays to the viewer depending on his/her search requests or any other (user-made) request. It ensures that the viewer has a personalized web experience.
It also requires the user request (as set by the viewer) to be processed by a query program, and then be further processed by a report generator application so that custom (personalized) web content is generated for the viewer.
This content includes interactive forms, animated graphics, and photo slideshows. Relatedly, automatically loading this dynamic content can require JS to perform repetitive tasks, and re-coding the scripts used to fetch and display this content is cumbersome and time-consuming.
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JSX, DOM, and Virtual DOM
When the web browser processes an HTML (HyperText Markup Language) document so that it can display it as a webpage, it creates a representational tree of how the HTML elements and information in the webpage need to be arranged.
This representational tree is called the Document Object Model (DOM), and React JS allows a developer to add dynamic content to the webpage through modification of this DOM.
JSX is compatible with modern web browsers. When JSX is used to modify, update, and manipulate the DOM, React JS creates a virtual DOM which is a copy of the DOM that React JS uses to identify what parts of the real/actual DOM need to be modified when a specific event happens, for example (e.g) when the viewer clicks a button or submits a form.
This makes React JS declarative as it supports declarative views.
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React Ecosystem and React Native
Moreover, React JS is open source which allows a developer to download the source codes of individual components and modify them to suit his/her needs. This ecosystem can allow a developer to build the website UI from scratch using React JS.
Facebook maintains React Native, and its use of JS allows for code sharing across different mobile platforms, but it also carries the disadvantage that should one not find a native component, then (s)he needs to code for this component from scratch.
Even so, the React Native community of users and developers is large, and thus one can seek help and support from this community when troubleshooting or building a React Native app, or coding for a novel native component.
So, where can an aspiring React developer learn how to code in React JS? Also, where can a React developer get more skills so as to hone his/her coding skills and knowledge on how to use React JS when managing full-stack projects?
The answer is that one can use any of the available education technology platforms. Even so, for a serious learner, the best choice of EdTech platform for learning React is Udemy.
Head here for our recent review of some of the best React JS courses currently being offered on Udemy.