This JavaScript code demonstrates how to use Promises to simulate an asynchronous coffee ordering process. A new Promise named coffeeorder is created to mimic an order being processed by a coffee machine. It resolves with a success message if the machine is available (coffeemeachine is true), or rejects with an error message if not.
After logging that the order has been placed, the promise is executed. If resolved, it logs the success message and chains another promise to simulate billing, which also resolves with the total amount. If the promise is rejected at any point, the error message is caught and logged. Regardless of the outcome, a final message thanking the customer is always displayed using the finally() block.