Promise Chaining Javascript

• Promise chaining is the practice of attaching multiple .then() handlers to a promise to handle sequential asynchronous operations in a cleaner, more readable manner.
• Each .then() in the chain is executed after the previous promise is resolved, and it passes the result to the next .then()
• Each operation depends on the previous one & errors can be handled in a single .catch()
• Avoids Callback Hell Javascript

Example

getUserData(userId) 
	.then(user => getPosts(user))        // Pass user to getPosts
	.then(posts => getComments(posts))   // Pass posts to getComments
	.then(comments => {                  // 
		console.log(comments);           // Do something with comments
	})
	.catch(error => console.error(error));// Handle any errors