Promises | Promises,

: They help developers avoid " callback hell "—a messy situation where multiple functions are nested inside each other, making code hard to read and debug. 2. The Theological Guide: Biblical Promises

.catch() : Used for error handling if the promise is rejected. Promises, Promises

In programming, a is an object representing the eventual completion (or failure) of an asynchronous operation and its resulting value. Three States of a Promise : : They help developers avoid " callback hell