What is React Native? How does it work?
The thing with React is that it came at just the right time, when developers needed a solution for problems with heavy and scalable apps. React was created at Facebook in response to the load times for their advertising pages. A few changes, resulted in having to rewrite a lot of code and dumping it into the DOM. React changed this, allowing developers modify only segments of a code that was required, also drastically lowering the render rate on the server side. React hit the markets in 2013.
With mobile development taking the center stage and people shifting their usage to smartphones and tablets, rather than computers — it was becoming crucial to focus on mobile development as well. But there was another problem that needed tackling. Developing apps for the different OSes available was becoming tedious. Developers required to learn, master, write and maintain code for each individual OS. So, they would have create four versions of the same app, and they would differ across OSes. Apps built like this would differ from each other and/or compromised experience performance drastically.
What exactly is React Native?
Native forgoes the old ‘write once, run anywhere’ mantra and instead opts for ‘learn once, write anywhere.’
How Does it Work?
While the idea of writing Android and iOS apps sounds a little odd, it is quite possible in React because of the Virtual DOM feature. The Virtual DOM acts as a layer between the developer’s version of how it should look and the work done to actually render it on to the page. In order to render interactive user interfaces, the developer must actually edit the browser’s DOM, a step that is not only expensive but also requires a lot of time and energy.
This is how React Native simplifies things. Instead of rendering the entire website, it makes a note of the changes made to the website in its in-memory version of the DOM and then uses the minimal amount of application to render only the limited changes.
This saved up a lot of time and memory in performance and also made reloading faster. React Native took this a step further. The abstraction layer between the code and host platform opened up questions such as “what if React could render to a target other than the browser DOM?” Since, it already understands what the application looks like, developers tried to apply this strategy to smartphone apps.
While a lot of companies such as Netflix and Flipboard were already modifying React for multiple platforms, Facebook opened up this possibility for the general public in 2015. At the 2015 React
Conf, Facebook announced that React could now render natively to mobile platforms.
However, if you are a newbie and you want to learn this brilliant technology from scratch, you can definitely do so with Eduonix’s upcoming beginners to advance course on Indiegogo. Support and check out this amazing course and all other campaign details on the company’s Indiegogo campaign page.