What is chaining promises in JavaScript?

What is chaining promises in JavaScript?

Chaining promises allows you to execute asynchronous operations in sequence. Each promise returns a new promise.

Can you give me an example of how to chain promises?

Sure! Here's a simple example:

fetch('url1')
  .then(response => response.json())
  .then(data => fetch('url2'))
  .then(response => response.json())
  .then(data => console.log(data));

What happens if one of the promises fails?

If a promise in the chain fails, the subsequent promises will be skipped, and the error can be caught using a .catch() method.

How can I handle errors in chained promises?

You can handle errors by adding a .catch() at the end of the chain, which will catch any errors from the previous promises.