Modern JavaScript from the Beginning - Second Edition - Promise Chaining

The video tutorial explains promise chaining in JavaScript, focusing on handling asynchronous tasks using .then and .catch methods. It demonstrates how to chain multiple .then calls to process resolved values and handle errors with .catch. The tutorial also covers returning values from .then and .catch, showing how these values can be accessed in subsequent .then calls. The video concludes with a brief mention of addressing callback hell in the next video.

What is the primary purpose of promise chaining?

• To create new promises

• To manage sequences of asynchronous tasks

• To avoid using callbacks

• To handle synchronous tasks

In promise chaining, what can be accessed in a subsequent 'then' method?

• The original promise

• The entire user object

• The value returned from the previous 'then'

• The error object

How can you obtain the length of a user's name in a promise chain?

• By using a 'catch' method

• By returning 'name.length' in a 'then' method

• By logging the user object

• By using a separate function

What happens when an error is caught in a promise chain?

• The error is ignored

• The 'then' methods before the 'catch' are skipped

• The 'catch' method is skipped

• The chain stops immediately

What can be done after handling an error in a promise chain?

• A new promise must be created

• The chain cannot continue

• The error must be rethrown

• The chain can continue with a new 'then' method