What is Z-Index?
Z-index is a CSS property that allows you to specify the order of elements that are stacked on top of each other. It is a number that is used to determine the relative position of a given element compared to the other elements. The higher the number, the higher the element will be in the stacking order.
How Z-Index Works
The Z-index property works by assigning a number to an element that determines its relative position compared to other elements in the same stack. If two elements have the same Z-index value, the element that is defined last will be the one that appears on top. Elements with higher z-index values will always appear on top of elements with lower z-index values.
Let’s look at an example to better understand how Z-index works. Imagine you have two elements, a
, that are both positioned on the same plane. The
element has a z-index value of 3. In this case, the
element, since it has the higher z-index value.