javascript-timers

Question 1

What is a “callback” function?

Answer 1

a callback function is a function that is called in the argument of another function to complete a set of actions

Question 2

Besides adding an event listener callback function to an element or the document, what is one way to delay the execution of a JavaScript function until some point in the future?

Answer 2

setTimeout(callback function, delay in milliseconds)

Question 3

How can you set up a function to be called repeatedly without using a loop?

Answer 3

setInterval(callback function, delay in milliseconds)

Question 4

What is the default time delay if you omit the delay parameter from setTimeout() or setInterval()?

Answer 4

0 seconds

Question 5

What do setTimeout() and setInterval() return?

Answer 5

setTimeout() and setInterval return an intervalID which can be fed to clearInterval or clearTimeout which will put an early end to the respective functions that were being ran