Promise

The beauty of working with JavaScript's asynchronous events is that the program continues its execution, even when it doesn't have any value it needs to work that is in progress. Such scenarios are named as yet known values from unfinished work. This can make working with asynchronous events in JavaScript challenging.

Promises are a programming construct that represents a value that is still unknown. Promises in JavaScript enable us to write asynchronous code in a parallel manner to synchronous code.