dom-manipulation

Question 1

What is the className property of element objects?

Answer 1

Property that gets and sets the className of an element.

Question 2

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

Answer 2

Using the className property.

Question 3

What is the textContent property of element objects?

Answer 3

Property that gets and sets the text content of an element.

Question 4

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

Answer 4

Using the textContent property.

Question 5

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

Answer 5

Generally, yes.

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

Because storing DOM locations in a variable prevents the browser from looking for the information.