JavaScript Promises

In this video:
asyncOperation is a function that returns a promise. It simulates an asynchronous operation with a setTimeout function.
The Promise constructor takes a function with two arguments, resolve and reject. resolve is a function to be called when the operation is successful, and reject is a function to be called when there's an error.
The then method is used to handle the resolved value (success case), and the catch method is used to handle the rejected value (error case).
The finally method is optional and will be executed regardless of whether the promise is resolved or rejected.
You can chain multiple then and catch blocks for more complex asynchronous flows. Promises provide a clean way to handle asynchronous code and avoid callback hell.