How to use map function in React Js 12| map function in react js in hindi |Listing with map function

Listing with map function | ReactJS Tutorials in Hindi | Lists in ReactJS | React Map() function A map is a data collection type where data is stored in the form of pairs. It contains a unique key. The value stored in the map must be mapped to the key. We cannot store a duplicate pair in the map(). It is because of the uniqueness of each stored key. It is mainly used for fast searching and looking up data.