dom-manipulation

Question 1

What is the className property of element objects?

Answer 1

The name of the class attribute it is being assigned.

Question 2

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

Answer 2

element.className = ‘name of class’;

Question 3

What is the textContent property of element objects?

Answer 3

The text or words the HTML or DOM element displays.

Question 4

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

Answer 4

element.textContent = ‘new string’;

Question 5

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

Answer 5

Mostly, yes. It returns all properties and values pertaining to the event.

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

Easier for reusability.