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I just heard that react-fiber is ready. What is the big differences between react and react-fiber? Is it worth it to learn the whole new concept for that differences ?
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As mentioned earlier, fiber represents the React element. While rendering for the first time, React goes through each of the React elements and creates a tree of fibers. (We will see how it creates this tree in later sections.) It creates a fiber for each individual React element, like in the example above.
What is “React Fiber”? Fiber is the new reconciliation engine in React 16. Its main goal is to enable incremental rendering of the virtual DOM.
React uses virtual DOM to enhance its performance. It uses the observable to detect state and prop changes. React uses an efficient diff algorithm to compare the versions of virtual DOM. It then makes sure that batched updates are sent to the real DOM for repainting or re-rendering of the UI.
React uses a heuristic algorithm called the Diffing algorithm for reconciliation based on these assumptions: Elements of different types will produce different trees. We can set which elements are static and do not need to be checked.
React Fiber is an ongoing reimplementation of React's core algorithm, it’s just a complete internal re-write of React.
React Fiber is a complete, backwards compatible rewrite of the React core.
The goal of React Fiber is to increase its suitability for areas like animation, layout, and gestures. Its headline feature is incremental rendering: the ability to split rendering work into chunks and spread it out over multiple frames.
React Fiber is a virtual stack frame, with React Fiber being a reimplementation of a stack frame specialised for React components. Each fiber can be thought of as a virtual stack frame where information from the frame is preserved in memory on the heap, and because info is saved on the heap, you can control and play with the data structures and process the relevant information as needed.
You can find an excellent explanation from Lin Clark in this video.
For more details please check the following links ,
1.What is React Fiber ?
2.React Fiber Architecture
3.What Does React 16 Mean for You?
Hopes this will help you !!
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React Fiber is an ongoing reimplementation of React's core algorithm. The main difference between react and react fiber are these new features :-
Incremental Rendering :- React v16.0 includes a completely rewritten server renderer. It’s really fast. It supports streaming, so you can start sending bytes to the client faster
Handle errors in the render API : To make class component an error boundary we define a new lifecycle method called componentDidCatch(error, info).
Return multiple elements from render : With this new feature in React v16.0 now we can also return an array of elements, and string from component’s render method.
Portals : Portals provide a first-class way to render children into a DOM node that exists outside the DOM hierarchy of the parent component.
Fragments : A common pattern in React is for a component to return multiple elements. Fragments let you group a list of children without adding extra nodes to the DOM.
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