Async & Await

The video tutorial introduces the async/await feature in JavaScript, part of the ES7 standard, and demonstrates its implementation in Chrome. It covers creating basic functions with async, using async with promises and setTimeout, handling errors in async functions, and applying async/await with the fetch API. The tutorial emphasizes the benefits of async/await in simplifying asynchronous code, making it more readable and manageable compared to traditional promise chaining.

What is the primary purpose of using async/await in JavaScript?

• To make functions run faster

• To handle asynchronous operations more easily

• To compile JavaScript code

• To improve browser compatibility

What happens when you add 'async' to a function?

• The function throws an error

• The function runs synchronously

• The function returns a promise

• The function becomes a generator

How can you handle the result of a promise returned by an async function?

• Using the '.then' method

• Using a for loop

• Using a callback function

• Using a try-catch block

What does the 'await' keyword do in an async function?

• It pauses the function execution until the promise is resolved

• It speeds up the function execution

• It converts the function into a promise

• It throws an error if the promise is rejected

How can you handle errors in an async function?

• By using a forEach method

• By using a while loop

• By using a switch statement

• By using a try-catch block

What is the advantage of using async/await with the fetch API?

• It simplifies the syntax compared to using multiple '.then' calls

• It makes the code run faster

• It automatically handles errors

• It requires less memory

When using async/await with fetch, what must you do to convert the response to JSON?

• Use the '.json()' method

• Use the '.arrayBuffer()' method

• Use the '.blob()' method

• Use the '.text()' method