What is React JS?
- One-way data flow
Properties, a set of immutable values, are passed to a component's renderer as properties in its HTML tag. A component cannot directly modify any properties passed to it, but can be passed callback functions that do modify values. This mechanism's promise is expressed as "properties flow down; actions flow up".
- Virtual DOM
Another notable feature is the use of a "virtual Document Object Model," or "virtual DOM." React creates an in-memory data structure cache, computes the resulting differences, and then updates the browser's displayed DOM efficiently. This allows the programmer to write code as if the entire page is rendered on each change while the React libraries only render subcomponents that actually change.
- Architecture beyond HTML
The basic architecture of React applies beyond rendering HTML in the browser.
#Simple & Declarative
React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable and easier to debug.
#Learn Once, Write Anywhere
Develop new features in React without rewriting existing code. React can also render on the server using Node and power mobile apps using React Native.
#It's From Facebook
React has been developed by some of the brightest brains in computer science to solve scale problems for billions of users.
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