Full Stack Web Development MASTERY Course - Novice to Expert - Generators in JavaScript

The video tutorial introduces the concept of generators in JavaScript, explaining their unique ability to pause and resume execution using the yield keyword. It covers the syntax for creating generator functions, the role of the yield keyword, and the next method for resuming execution. An example is provided to demonstrate how generator functions work, highlighting the use of the iterator object and the do-while loop to iterate through values.

What is a generator in JavaScript?

• A variable declaration

• A special kind of function

• A type of loop

• A method for error handling

What symbol is used to define a generator function in JavaScript?

• #

• %

• &

• *

What does the 'yield' keyword do in a generator function?

• Declares a variable

• Ends the function execution

• Starts a new function

• Pauses the function execution

What does the 'next' method return when called on a generator?

• A boolean indicating success

• An object with 'value' and 'done' properties

• An array of values

• A single value

In the context of generators, what does the 'done' property signify?

• The generator is undefined

• The generator is paused

• The generator has finished yielding values

• The generator has more values to yield

What is the purpose of the 'do-while' loop in the generator function example?

• To declare variables

• To iterate through generator values until 'done' is true

• To handle errors

• To execute code only once

What happens when the 'next' method is called on a generator for the third time in the example?

• It returns 'done' as true

• It throws an error

• It yields a new value

• It restarts the generator