Full Stack Web Development MASTERY Course - Novice to Expert - Visibility and Z-Index Property in CSS

This video tutorial covers the CSS properties of visibility and Z index, explaining the differences between visibility hidden and display none. It provides a practical demonstration of how to set up an HTML file with CSS, create boxes with different colors, and manipulate their visibility and stacking order using Z index. The tutorial emphasizes the importance of understanding the parent-child-sibling relationship in HTML and how the Z index affects element overlap.

What is the primary focus of the lecture discussed in the introduction?

• CSS Flexbox

• Visibility and Z-index properties

• JavaScript Functions

• CSS Grid

What is the purpose of creating an HTML file with internal CSS in this lecture?

• To demonstrate JavaScript functions

• To learn about HTML forms

• To set up boxes with different colors and sizes

• To create a responsive layout

Which CSS property will leave a blank space when an element is hidden?

• opacity: 0

• visibility: hidden

• display: none

• z-index: -1

What is the key difference between 'visibility: hidden' and 'display: none'?

• 'display: none' makes the element transparent

• 'visibility: hidden' leaves a blank space

• 'display: none' leaves a blank space

• 'visibility: hidden' removes the element completely

What does the Z-index property control in CSS?

• The color of an element

• The horizontal position of an element

• The vertical position of an element

• The stacking order of elements

Which axis is associated with the Z-index in CSS?

• Z-axis

• Y-axis

• X-axis

• W-axis

What must be changed for the Z-index property to work?

• The element's font size

• The element's position from static

• The element's border style

• The element's color

In the context of Z-index, what is the default rendering order of HTML elements?

• Bottom-up

• Left-right

• Top-down

• Right-left

How does the Z-index affect sibling elements?

• It modifies their border style

• It determines their stacking order

• It alters their font size

• It changes their color

What happens if a child element has a higher Z-index than its parent?

• The child element will stack above the parent

• The child element will be hidden

• The child element will inherit the parent's Z-index

• The child element will change color