Advanced Javascript and DOM Manipulation

Question 1

Adding Event Listeners to a Button

Answer 1

.addEventListener( , );
 consists of a variety of different types to cause to execute the event listener
e.g. “click”
 usually a javascript function
Can also be an anonymous function

Question 2

Higher Order Functions and Passing Functions as…

Answer 2

Arguments

Question 3

How to play sounds on a website

Answer 3

Create a new Audio(< File Path >);
Call the .play(); of the audio object

Question 4

Javascript Objects

Answer 4

Javascript objects have one or more fields : data
Example:
var anand = { name : “Anand”, dob : “12/20/1993”}
Constructor
function (< Arguments > ) { }
Use the ‘new’ keyword to create an object

Question 5

Switch Statements

Answer 5

switch ( expression )
case < >:
Run the code for the case
break
default:
“Else statement”

Question 6

Keyboard Event Listener

Answer 6

document.addEventListener(‘keypress’, handler)

Question 7

Understanding Callbacks and How to Respond to Event Listener

// Callback function

Answer 7

Function that gets passed in as an input