dom-manipulation

Question 1

What is the className property of element objects?

Answer 1

selects and changes the value of the class attribute of specified elements

Question 2

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

Answer 2

using className property and selecting the CSS property

Question 3

What is the textContent property of element objects?

Answer 3

it selects and changes the text of the selected element and all its node

Question 4

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

Answer 4

textContent or innerText property

Question 5

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

Answer 5

generally useful but 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

because it may be more work and can’t depend on the DOM