Fiber is a new feature from the React team that fundamentally changes the way React does its work. It has already been released and is being used in production apps, so it’s an important concept to understand. However, there are a few misconceptions around Fiber that can lead to confusion. To help clear up some of the confusion, let’s take a look at which of the following is not true about Fiber.
First, Fiber does not use server-side rendering. It is designed for use in the browser and takes advantage of single-threaded execution of the client-side component of a web application. Fiber does not use a virtual DOM, nor does it use traditional DOM optimizations. Instead, it uses a new reconciliation algorithm called “Time Slicing” that is more efficient than the traditional DOM optimizations.
Second, Fiber does not rely on React Native to create mobile applications. React Native is a separate framework for creating applications for mobile devices, and Fiber is only for use in the browser. So, if you’re looking to create a mobile app with React, React Native is the way to go.
Third, Fiber does not use HTML5. Instead, Fiber is a JavaScript-based library that is designed to work seamlessly with React. It works with a unique component-based model that allows for the encapsulation of all logic that is related to rendering a web page. The entire page state is managed by a single instance of React, and components are re-rendered on demand, as needed.
Finally, Fiber does not create HTML content directly. Instead, it uses JavaScript to define the logic and create the components that make up a web page. To create HTML content, React renders the components to a virtual DOM that is then converted into HTML and injected into the page.
In conclusion, Fiber is a powerful new feature that is designed to significantly increase the performance of React apps. It is not reliant on server-side rendering, React Native or HTML5, and does not create HTML content directly. Instead, it uses a component-based approach and JavaScript to create and manage the page state. Understanding this powerful feature is the key to creating great React apps.