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

.className

Question 3

What is the textContent property of element objects?

Answer 3

Allows you to receive the text content or change it

Question 4

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

Answer 4

element .text content assigned to a new value

Question 5

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

Answer 5

Allows for an object to contain information without being thrown on to a browser or page instantly
and set it to an action ( not always useful)

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 , we would have to write out every line for each number

Question 7

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