Z Index – SushiWP

The Z-Index is a CSS (Cascading Style Sheets) property used in web development to control the stacking order of elements that overlap on a webpage. It helps determine which elements appear on top of others, much like stacking layers of paper on a desk; the piece of paper at the top of the stack is visible, while the papers underneath might be partially or completely hidden.

Each element on a webpage can be given a z-index value, which is a number. Higher numbers are placed closer to the front, meaning they appear on top of elements with lower numbers. For example, an element with a z-index of 5 will cover another element with a z-index of 2 if they overlap.

Using z-index is essential when you want to create complex layouts with elements that overlap each other, such as drop-down menus, modal dialogs, or custom tooltips. It gives developers the control to specify which parts of the interface should be visible over others, enhancing the usability and aesthetics of a webpage.

It’s important to note that z-index only works on positioned elements—those with a position value other than ‘static’, such as ‘relative’, ‘absolute’, ‘fixed’, or ‘sticky’. This property is a powerful tool in CSS, allowing for flexible and dynamic design schemes that can make web pages visually engaging and functional.