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| Why React |
Why React.js?
Simplicity
React.js is not a full fledged Javascript framework like Angular.js or other popular frontend frameworks. Instead, React.js is a JavaScript library that acts as the 'V' in MVC (Model View Controller). It is simply a view engine that can be dropped in and used with a plethora of other tools for the data and model part of MVC (most popularly Redux and Node.js).
Performance
Since React makes use of a Virtual DOM, it can selectively update portions of the page as needed rather than always having to complete an entire page reload. In many cases, not updating the entire DOM will save considerably on performance. Moreover, many of the built-in functions (such as Lifecycle functions) also have performance benefits as they often help to check if a re-render is even needed to begin with.
Low learning curve
Of the major frontend "frameworks" available, React has a relatively low barrier to entry and has a quick ramp up time. In addition, React's official documentation is extremely clear and provide many examples for most of the common use cases.
Tooling
The tools and software commonly utilized with React are incredibly well maintained and supported and provide several different avenues of best practices to follow when developing web applications. Some of these tools include Redux, React-router, Thunk, and many others. There are also a number of development tools, such as a React and Redux Chrome extension, which helps with debugging your React applications.
Support
React is created and maintained by the folks at Facebook and is used by individuals and companies all over the world in large volume. This means React is constantly improving and any problems you may have have probably already been asked on Stack Overflow.
Other than the above, we can take our react knowledge to develop mobile native applications using react-native and also take our knowledge and expand it to VR using react-vr. Basically learning react opens us up to various other oppurtunities like using it for Web, VR, PWA(Progressive Web App) and many others
More Information
To learn more about why React is so great check out the official website