Complete React Developer Course

React adheres to the declarative programming pattern. Developers design views for each state of an application, and React updates and renders components when data changes. This is in contrast with impresive programming

React code is made of entities called components, These components are modular and can be reused. React applications typically consist of many layers of components. The components are rendered to a root element in the Dom using the React DOM library. When rendering a component, values are passed between components through props (short for “properties”). Values internal to a component are called its state.

The two primary ways of declaring components in React are through function components and class components. Since React v16.8, using function components is the recommended way.

Function components, announced at React Conf 2018, and available since React v16.8, are declared with a function that accepts a single “props” argument and returns JSX. Function components can use internal state with the useState Hook.