dom-events

Question 1

Why do we log things to the console?

Answer 1

test and debugg our code

Question 2

What is the purpose of events and event handling?

Answer 2

to allow users to interact with the page and have that result in the page changing

Question 3

What do [] square brackets mean in function and method syntax documentation?

Answer 3

indicates optional

Question 4

What method of element objects lets you set up a function to be called when a specific type of event occurs?

Answer 4

.addeventListener()

Question 5

What is a callback function?

Answer 5

one that will be called by another function or object etc

Question 6

What object is passed into an event listener callback when the event fires?

Answer 6

the event object

Question 7

What is the event.target? If you weren’t sure, how would you check? Where could you get more information about it?

Answer 7

reference to the object onto which the event was dispatched. on mdn

Question 8

What is the difference between these two snippets of code?

element. addEventListener(‘click’, handleClick)
element. addEventListener(‘click’, handleClick())

Answer 8

the first one is a callback function and second one is calling the function. the second one immediately calls the function