Abstract: ReactJs is a front–end library developed by Facebook. It is used for handling the view layer for web and mobile applications. ReactJS allows creating reusable user interface components. It is currently one of the most popular JavaScript libraries and has a strong foundation and large community behind it. ReactJS is a declarative, efficient and flexible JavaScript library for building user interface. In model view controller architecture, React is the view which is responsible for how app looks and feels. React handles DOM gracefully, it composes complex UIs from small and isolated pieces of code called component.

Keyword: ReactJS, JavaScript, User interface, Component.

| DOI: 10.17148/IARJSET.2021.8229