dom-manipulation

Question 1

What is the className property of element objects?

Answer 1

The className property of the Element contains the class name of an element and allow you set the class name.

Question 2

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

Answer 2

.className, another way is classList

Question 3

What is the textContent property of element objects?

Answer 3

the textContent property is the text content of the node and its descent ( get or set the text content)

Question 4

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

Answer 4

.textContent property on the element.

Question 5

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

Answer 5

not always, it’s useful but not always have to use it.

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

it would be more complicated

Question 7

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

Answer 7

we can have more control by using the stored information directly instead of the text content or the dom.