Summary: Basics of Promises
Explore the basics of JavaScript promises by understanding their lifecycle states, methods like then, catch, and finally, and how to create promises using constructors and utility functions. This lesson helps you grasp how promises manage asynchronous operations effectively.
We'll cover the following...
We'll cover the following...
Summary
A promise is a placeholder for a value that may be provided later as the result of some asynchronous operation. Instead of assigning an event handler or passing a callback into a function, we can use a promise to represent the result of an operation.
Promises have three states: pending, fulfilled, and rejected. A promise starts in a pending (unsettled) state and becomes fulfilled on a successful ...
