Z-Index: CSS Property for Stacking Order of Elements

z-index is a CSS property that controls the stacking order of elements on a web page. It determines the order in which elements are displayed on top of one another, with higher z-index values appearing on top of lower ones.

The z-index property is used to position elements that overlap each other, such as images, text, and other content. By default, elements have a z-index value of 'auto', which means they are stacked in the order they appear in the HTML document.

To change the stacking order, you can use the z-index property and assign a value to it. Elements with a higher z-index value will appear on top of elements with a lower value. For example, if you want an image to appear on top of a text block, you can give the image a higher z-index value than the text block.

It's important to note that the z-index property only works on positioned elements, such as those with a position value of 'absolute', 'relative', or 'fixed'. Additionally, using high z-index values excessively can lead to confusing and hard-to-manage code, so it's important to use it judiciously.