JavaScript Promises
Promises are used to handle asynchronous operations in JavaScript. They are easy to manage when dealing with multiple asynchronous operations where callbacks can create callback hell leading to unmanageable code. Prior to promises events and callback functions were used but they had limited functionalities and created unmanageable code. Multiple callback functions would create callback hell that leads to unmanageable code. Also it is not easy for any user to handle multiple callbacks at the same time. Events were not good at handling asynchronous operations. Promises are the ideal choice for handling asynchronous operations in the simplest manner. They can handle multiple asynchronous operations easily and provide better error handling than callbacks and events. In other words also, we may say that, promises are the ideal choice for handling multiple callbacks at the same time, thus avoiding the undesired callback hell situation. Promises do provide a better chanc...