DOM Manipulation

Question 1

What is the className property of element objects?

Answer 1

Gets and sets the value of the class attribute of the specified element

Question 2

How do you update the CSS class attribute of an element using JavaScript?

Answer 2

element.className property = updated value

Question 3

What is the textContent property of element objects?

Answer 3

Sets or returns the text content of the specified node, and all its descendants

Question 4

How do you update the text within an element using JavaScript?

Answer 4

element.textContent property = new value

Question 5

Is the event parameter of an event listener callback always useful?

Answer 5

No

Question 6

Would this assignment be simpler or more complicated if we didn’t use a variable to keep track of the number of clicks?

Answer 6

More complicated

Question 7

Why is storing information about a program in variables better than only storing it in the DOM?

Answer 7

Do not have to do DOM lookups.
DO not have to worry about unexpected behavior of the browser