ReactJS is a component-based front-end library that is responsible only for the view layer of the application.
Each component in a React application is responsible for rendering a separate, reusable piece of HTML code.
ReactJS uses a virtual DOM based mechanism to fill data in HTML DOM, which works fast as it only changes individual DOM elements instead of reloading the complete DOM every time.
ReactJS is ideal for applications that change their data quickly and dynamically, and it can show the parts of the UI that are changing without re-rendering the whole page, making the user experience much faster
Some key features of ReactJS include:
- Easy to use: ReactJS is easy to use and integrate.
- Comprehensive component library: ReactJS provides a comprehensive collection of high-quality components out of the box.
- Virtual DOM: ReactJS uses a virtual DOM that makes it faster and more efficient than other libraries.
- Reusable components: ReactJS allows you to create reusable components that can be used across your application.
- Unidirectional data flow: ReactJS uses a unidirectional data flow that makes it easier to reason about your application and debug it.
To get started with ReactJS, you can follow the official tutorial on the ReactJS website.
The tutorial covers the fundamentals of React, including components, props, and state.
ReactJS also has integrations with other frameworks, such as Angular and Meteor, to help organize the UI layer alongside application logic.