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The Strengths and the Weaknesses of ReactJS and React Native

     These days ReactJS and React Native are truly groundbreaking techs in the web and mobile apps development industry. These innovative tools have arrived in 2011 thanks to Facebook. In order to facilitate the process of creating the applications and to make the system more convenient to the customer, Jordan Walke, a Facebook’s software developer, came up with an idea to establish special libraries that can be applied for the development of the interface when coding with the help of JavaScript.
     This article is aimed to figure out the prehistory of React creation as well as to find the pros and cons of utilizing React techs.
 
     The essence of React
     Before ReactJS has become available for multiple users, the biggest challenge of Facebook was to create fast-moving and productive UI. For instance, the developers required the possibility to enable adding fresh news into the newsfeed at the same time when the client was modifying personal data profile or talking to the friends in chat.
     In order to make it real Facebook needed to improve the development procedures, and Walke was street-smart enough to use JavaScript for that. In particular, he suggested placing XHP, the marking pattern of Facebook, into the JS-navigated environment. That time it sounded a bit fantastic, nevertheless seven years ago the ReactJS library based on the synthesis of JavaScript and XHP has been successfully delivered. When the solution became public, Facebook understood that ReactJS is swifter comparing with any other similar solution of the same profile.
      In a nutshell, ReactJS is a JavaScript-based library that comprises the velocity of JavaScript and the innovative mechanism to render the websites that allows them extremely fast-moving and reactive towards users’ inquiries. Indeed, this solution has drastically transformed Facebook’s methodology in web development. Since the day ReactJS appeared as an open source software two years after primary release, it's spreading among the customers was incredibly dynamic thanks to its extraordinary way of coding user’s interface.
    A couple of years after that the same team delivered React Native, a combined framework for mobile applications creation for iOS and Android operational systems. The core technologies of ReactJS and Reactive Native are basically the same, therefore, the developer's societies as well as software companies, the priority of which is specifically mobile format, have adapted themselves to it rapidly.
    React Native provides the possibility of native apps creation in JavaScript UI environment. As long as massive and complex properties can be produced using the native components for iOS and Android, the remaining part of the program can be coded with the help of JavaScript and distributed all over the platforms. In comparison with Cordova or PhoneGap, the multiple-stage instruments, React Native doesn’t utilize WebView, a portable gear compressing the code. At the same time, it allows using native portable adapters that enable the coders to obtain native appearance and sensation of the applications.
   Below you are suggested to review the strengths and weaknesses of ReactJS. After that, the analysis of React Native’s dissimilarities, its positives, and negatives derived from ReactJS will be proposed.
 
     Strengths of ReactJS
      1. Virtual Document Object Model improves UX and facilitates coding
     DOM is the rational formation of the files in multiple formats such as HTML, XHTML, and XML. In the dilettante’s words, it is the outlook tree-structured arrangement of data entries and outs. The blueprint gears are utilized in browsers to change or to disassemble the image HTML-pattern into DOM that can be observed in the browser.
   The principal issue related to conventional DOM building is the method of transformations treatment, for example, customers’ inquiries, requests etc. The server continuously conducts the monitoring of the distinctions that appeared due to these alternations in order to submit the required reply. In order to provide the relevant answer an upgrade of the tree-type structures of Document Object Model throughout the file is required, that is not easy to do as the DOM trees are rather expanded these days and consist of multiple constituents.
    The group of developers in charge of React achieved the increase of velocity of updating the system with the help of virtualized Document Object Model. In a simple phrase, as long as other frameworks approach practically existing DOM, their newest competitor, ReactJS, exploits the non-figurative model, the virtual one. It allows renewing the tiniest alternations, submitted by the customer while the rest of interface components remain unimpaired. This can be achieved because of the encapsulation of React’s elements and exclusive scheme of data arrangement within the boundaries of the library.
     It conducts the updating process promptly, therefore it is possible to design an extremely swift UI. It can be observed in the aforementioned situation when the client is able to change personal information profile and get more news simultaneously. Furthermore, in the case of ReactJS, the coders shouldn’t connect the Document Object Model with the operational content placed in the front-end as the components of React have been already associated with it. 
    This method helps the coders to deal with UI-modules at a higher rate and to employ urgent reload, i.e. bringing the transformations into immediately. Thus, it enhanced the productivity and raised the coding velocity.
      2. The repeated utilization of the code elements
    Another advantage of React is the possibility to repeatedly exploit the elements of the code on any stage at any given point in time. This feature helps to reduce the time required for coding.
    Basically, reusing the available components is an effective practice that is proved by the web designers who achieve significant time-saving results when applying the same pieces and modules within various projects. Yet, in terms of coding the situation is more complex. The updates of the system can be really challenging as every even small transformation may influence the functioning of other elements.
     3. The single-oriented data stream in ReactJS produces substantial code
    ReactJS ensures straight access to the elements and exploits descending data associating method to protect the higher level configurations from being transformed when the lower level structures are being modified. It allows getting the balanced code.
   More complicated observation-type arrangements of JS-configuration are characterized with tangible weakness: schemes of data streams. Actually, the low-level elements may influence the higher level ones when being altered in JS view model structures. In the case of ReactJS, the vendor has eliminated these negatives by leaving it as just the viewing structure.
   As a substitute for applying clear data association, ReactJS prefers utilizing single orientation model, a descending data stream. That’s why the lower level components don’t affect the lower level ones. Consequently, everything the coder should do is to change the status of the element and to add the updated fragments. As a result, solely the authorized constituents will be amended.
    4. Library with the publicly-available code: more progress, more improvements
   ReactJS is one of those JavaScript-related software products that has been delivered to the industry as the open-source solution. It allows ReactJS get all possible benefits of such format, in particular, plenty of innovative and productive concepts and applications contributed by the outside coders that in turn skyrocketed ReactJS popularity among the developers. Nowadays it is among top-10 most demanded solutions proposed on GitHub with almost 70 thousand stars. In order to sustain the product at such a high rate about one thousand outward contributors are focused on a library.
 
     Weaknesses of ReactJS
     1. Extreme development velocity
    The problem is that coding landscape is being altered too fast and the developers have to always and get used to the updated methods and patterns. Consequently, many coders are not able to cope with such high velocity.
     2. Insufficient level of documentation available
    The heart of the problem is the continual issuance of the upgraded instruments. Various cutting-edge libraries such as Reflux are aimed to facilitate functioning and to advance the whole ReactJS environment. However, the coders often have difficulties when implementing new instruments into ReactJS. For instance, some societies of developers believe that React solutions are being upgraded so quickly that there is too few time to create sufficient working manuals. In order to revolve this complicacy, the coders have to create special instructions by themselves for the individual instruments being employed in the ongoing projects.
      3. JSX makes it tough
    In order to allow combining HTML and JavaScript, React utilizes JSX. Indeed, JSX presents certain benefits such as securing the code from inputs, but some developers believe JSX is a big problem too. For example, they are often confused with its multiplicity when studying it.
 
     The distinction between ReactJS and React Native
    The chronological gap in the release of ReactJS and React Native is two years, however, this is not the biggest issue that makes them different. Basically, ReactJS was created to develop web interface while React Native is a mixed-type framework for developing the applications for iOS and Android mobile operating systems. The good news is React Native derives the majority of concepts and patterns from ReactJS.
    As a matter of fact, the most tangible variations between the two products are related to the purposes of the platform.
    -   As long ReactJS exploits Virtualized Document Object Model for rendering the code of a browser, React Native takes advantage of original Application Programming Interfaces that serve as an adapter for rendering the elements in the portable format. For instance, React Native embraces the Application Programming Interfaces of Java and actuates Objective-C API’s module to shift to iOS.
     -   There is no HTML involved in React Native. Therefore, it may take some time and efforts for you to get adjusted to React Native patterns if you used to deal with ReactJS before.
     -   As long as React Native avoids utilizing CSS, the CSS-based elements can be launched only with the help of special Application Programming Interfaces.
 
      Strengths of React Native
     These days React Native is acknowledged to be one of the quickest and productive spaces for creating mobile applications. In a layperson’s terms it is very similar to ReactJS but in a mobile format:
      1. Using JavaScript
    JacaScript is still extremely dynamic and popular language all over the world. As the recent Stack Overflow study shows, more than 50% of the coders prefer JavaScript. The experience of JavaScript societies allows the rookie developers easily master it.
   Moreover, React Native provides the key strengths of JavaScript and ReactJS. The fullness of JavaScript coding elements enables to produce the finished program within shorter terms as well as the coding process became easier because there is no need to reboot each prepared application every time it is upgraded in order to review the alterations: the trick is you can reload the overview page only.
     Sometimes the follow-up updating can be even accelerated, e.g. iOS ensures functionality of the JS-related transformations of the apps in an online regime without the necessity to observe the circuit.
    2. Original monitoring features and elements in React Native: the productivity reinforcement factor
   React Native transfers the range of code elements using native Application Programming Interfaces as contrasted with other frameworks, for example, PhoneGap that shifts the code elements through WebView. As WebView negatively impacts the through-put, React Native access the required modules of iOS and Android, transferring the data to the original API straightly. This method also includes the individual fiber connecting UI that improves the results too.
     The importance of original modules can’t dine anyway. These days React supplies the developers with the kit of native modules on Java as well as in Objective-C. It is impossible to repeatedly utilize them throughout two OS, however, they are useful for increasing productivity when dealing with complex solutions such as a photo or video processing. What is important, you are able to operate with the available modules or to create specific individual modules by yourself. The expansion of React developers’ societies positively influences the availability of public features when the remaining part of the code is not permitted to be repeatedly employed. For example, Facebook Ads Manager distributes almost 90% of the code in the iOS and Android environment.
     Furthermore, React Native ensures easy bugs elimination and error notification instruments availability. Therefore, the developers are able to employ the development facilities of the most popular and well-known browsers, for example, Safari or Chrome.
    3. React Native have inherited all ReactJS characteristics that make UI better
    As React Native derived multiple features from ReactJS as from JS library, it also takes over the primary benefits from it. In order to design the multiple platform application using React Native, the understanding of the original stage language is not required. The only thing they have to know is JS and React basic patterns. If necessary, it is always possible to supplement the code with native elements.
     In React Native the descending data stream model is reproduced, thus, the high-level elements are modified without changing low-level ones. This approach helps to polish the procedure of UI development, so the applications seem to be more native.
 
     Weaknesses of React Native
       1. Availability of the documents
    Sadly, React Native has the same problem as ReactJS. The society is at the early stage of its development, so quality and availability of the necessary manuals are low, in particular, what concerns associating React Native with supplementary instruments.
      2. Proficiency in native modules
     Undoubtedly, the native modules play the positive role in coding by providing a framework with extra variability and helping out the system in case of lacking some performance. The developers often exploit the original modules when dealing with complicated objects.
   Yet, at the same time, it may negatively impact the multiple-platforms development stage because the team will require additional engineers focused on native modules just in case.
       3. The elements involved from the outside
     The vendor declares that it possesses the range of original modules for Android as well as for iOS, taken from the outside environment, however, the quantity of such elements is insufficient. At the same time, there is no guarantee that in-house created modules will remain valid in the further updates of the framework.
      4. Leaving off SDK amendments
     It is a well-known fact that React Native often back-pedals when SDK is upgraded by Android or iOS. The thing is the React Native development group have to associate the library with the latest software. Although these processes are conducted quickly, they are not able to amend each segment of Application Programming Interface simultaneously. This is a cause why the complete integration of React Native with latest versions of SDK is so slow.
 
     The famous & successful cases of ReactJS and React Native implementation
     Obviously, in terms of world-known projects, React JS is a leader being a key technology for such distinguished startups as Instagram, that aimed to make both web and mobile apps to get more users, Netflix, that is utilizing it along with Gibbon, and Airbnb, that shifted to ReactJS due to code reorganization simplicity and the possibility of its elements repeatable use. In turn, React Native was integrated by Bloomberg when creating the mobile application for a web magazine, and it stands to mention that Bloomberg seems to be really excited about having this technology.
 
      Conclusion
    In the context of productivity React is really sky-rocketing tech taking into account its progressing popularity in the developers’ societies and among the businesses that starting using it. As long as most of the other frameworks enhance user interface by increasing software effectiveness, “green as grass” and sometimes puzzle-headed React Native thrives into the transformation of the method for associating the application with the software as well as hardware. At the same time, ReactJS proposes outstanding possibilities in front-end web development improvement and upgrading.

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