Dom -querying

Question 1

What is a “model”?

Answer 1

model of the page

Question 2

Which “document” is being referred to in the phrase Document Object Model?

Answer 2

tree structures

Question 3

What is the word “object” referring to in the phrase Document Object Model?

Answer 3

all the elements + attribute

Question 4

What is a DOM Tree?

Answer 4

model of that page

Question 5

Give two examples of document methods that retrieve a single element from the DOM.

Answer 5

1. getElementBy Id()

2. querySelector();

Question 6

Give one example of a document method that retrieves multiple elements from the DOM at once.

Answer 6

querySelectorAll()

Question 7

Why might you want to assign the return value of a DOM query to a variable?

Answer 7

don’t have to keep checking

Question 8

What console method allows you to inspect the properties of a DOM element object?

Answer 8

console.dir

Question 9

Why would a tag need to be placed at the bottom of the HTML content instead of at the top?

Answer 9

to access an the object of the DOM

Question 10

What does document.querySelector() take as its argument and what does it return?

Answer 10

selectors –> DOMstring

Return –> first matching

Question 11

What does document.querySelectorAll() take as its argument and what does it return?

Answer 11

selectors –> DOM string

return value –> nodelist