z-index is a CSS property that controls the vertical stacking order of elements on a web page.

z-index is a CSS property that controls the vertical stacking order of elements on a web page. It determines which elements appear in front of or behind other elements when they overlap.

The z-index property works by assigning a value to an element, with higher values appearing in front of lower values. Elements with the same z-index value are stacked according to their order in the HTML document, with later elements appearing on top of earlier ones.

The z-index property only works on positioned elements, which means that an element must have a position value of relative, absolute, or fixed for z-index to have any effect.

z-index is particularly useful for creating layered layouts, where certain elements need to appear in front of or behind other elements. For example, if you have a navigation bar that should always appear in front of other content, you can give it a higher z-index value than the rest of the content.

It's important to use z-index carefully and thoughtfully, as using high values for multiple elements can cause unexpected stacking order and overlap issues. In general, it's best to use z-index sparingly and only when necessary.

The z-index property works by assigning a value to an element, with higher values appearing in front of lower values. Elements with the same z-index value are stacked according to their order in the HTML document, with later elements appearing on top of earlier ones.

The z-index property only works on positioned elements, which means that an element must have a position value of relative, absolute, or fixed for z-index to have any effect.

z-index is particularly useful for creating layered layouts, where certain elements need to appear in front of or behind other elements. For example, if you have a navigation bar that should always appear in front of other content, you can give it a higher z-index value than the rest of the content.

It's important to use z-index carefully and thoughtfully, as using high values for multiple elements can cause unexpected stacking order and overlap issues. In general, it's best to use z-index sparingly and only when necessary.

Z-index is a CSS property that controls the vertical stacking order of elements that overlap with each other in the HTML document. It determines which element appears in front of the other when elements are positioned and overlapping.

Here is an example of how the Z-index property can be used in CSS:

div {
  position: absolute;
  width: 300px;
  height: 200px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  border: 1px solid #ccc;
  z-index: 1;
}

p {
  position: absolute;
  top: 100px;
  left: 100px;
  z-index: 2;
}

In the code snippet above, there are two elements: a div and a p element. Both elements are positioned absolutely, and the p element is layered on top of the div element using the z-index property. Because the p element has a higher z-index value, it appears in front of the div element.

In summary, z-index helps to control the overlapping of elements in your HTML document when they are positioned. It is particularly useful when creating layered effects, such as dropdown menus or pop-up modals.