dom manipulation

Question 1

What is the className property of element objects?

Answer 1

allows you to grab or set the class of an element

Question 2

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

Answer 2

element.className = ‘class’

use += ‘ newClass’ to add instead of replace

Question 3

What is the textContent property of element objects?

Answer 3

Any text contained by the element

Question 4

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

Answer 4

element.textContent = ‘new text content’

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

DOM is only a model, variables are part of the code