Quick JavaScript Crash Course - Modern and Advanced JavaScript - Introduction-Async Patterns, Promises

The video tutorial introduces new features in asynchronous programming, focusing on promises. It covers the new allSettled method and compares it with the existing promise.all method. Additionally, it introduces the promise.any method and compares it with the promise.race method. The tutorial aims to provide a comprehensive understanding of these new methods and their applications.

What is the primary focus of the new features introduced in the async section?

• Error handling

• Promises

• Synchronous programming

• Data structures

Which method allows you to wait for all promises to settle, regardless of their outcome?

• Promise.allSettled

• Promise.any

• Promise.race

• Promise.all

How does Promise.all differ from Promise.allSettled?

• Promise.all waits for all promises to resolve or reject, while Promise.allSettled waits for all to settle.

• Promise.all only works with resolved promises, while Promise.allSettled works with rejected ones.

• Promise.allSettled only works with promises that resolve.

• Promise.allSettled is faster than Promise.all.

Which method returns the first promise that fulfills, ignoring rejected ones?

• Promise.all

• Promise.any

• Promise.allSettled

• Promise.race

What is the key difference between Promise.any and Promise.race?

• Promise.any is faster than Promise.race.

• Promise.any returns the first fulfilled promise, while Promise.race returns the first settled promise.

• Promise.any waits for all promises to settle, while Promise.race waits for the first one.

• Promise.any is used for synchronous operations, while Promise.race is for asynchronous.