Facebook created React in 2011 as a declarative, efficient, and flexible open-source front-end JavaScript library.
It takes a component-based approach to creating reusable UI components, which is especially useful for single-page applications.
It is used to create web and mobile applications' interactive view layer.
Jordan Walke, a Facebook software engineer, created it. It was first used in Facebook's News Feed section in 2011, and it is now used in products like WhatsApp and Instagram.
