dom-events

Question 1

Why do we log things to the console?

Answer 1

Debugging, checking how things are working

Question 2

What is the purpose of events and event handling?

Answer 2

Making a page interactive

Question 3

Are all possible parameters required to use a JavaScript method or function?

Answer 3

no

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

A callback function is a function passed into another function as an argument, which is then invoked inside the outer function to complete some kind of routine or action.

Question 6

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

Answer 6

the event object which contains all information about that event

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

target property of event object is the point of interaction, (if you hover over an object, that would be the event.target).

Question 8

What is the difference between these two snippets of code?

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