The MVC (model view controller) design is now used by the majority of websites. React is the 'V' in MVC architecture, which stands for view, whereas Redux or Flux provides the architecture
A ReactJS application consists of several components, each of which is responsible for producing a short, reusable piece of HTML code. All React apps are built around components. These components can be stacked with one other to create sophisticated applications from simple building blocks. To populate data in the HTML DOM, ReactJS uses a virtual DOM-based technique. The virtual DOM is quick because it simply modifies individual DOM elements rather than reloading the entire DOM every time.
As a result, the ReactJS framework was created, which eliminates this flaw. ReactJS allows you to break down your entire app into different components. ReactJS uses the same traditional data flow as before, but it does not operate directly on the browser's Document Object Model (DOM); instead, it uses a virtual DOM. It means that after modifications to our data, instead of modifying the document in a browser, it resolves changes on a DOM generated and operated totally in memory. React identifies what modifications were made to the actual browser's DOM after the virtual DOM has been updated.
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The following is a list of React's most significant drawbacks: React is nothing more than a library. It isn't a full-fledged framework. It has a large library that takes some time to comprehend. New programmers may find it challenging to comprehend and code. Inline templating and JSX are used by React, which can be challenging and function as a barrier. It also complicates the coding.
React fragments are a feature that allows you to write a set of children elements or components without actually generating a node in the DOM.
The fragment syntax appears as an empty collection of tags>/> or as React. Fragment tags.
To put it another way, there are occasions when we need to group numerous React elements into a single parent yet don't want to use a generic HTML element like a div.