z-index

Utilities for controlling the stack order of an element.

2025-04-12

Written by: tdtc

ClassStyles
z-<number>z-index: <number>;
z-autoz-index: auto;
z-[<value>]z-index: <value>;
z-(<custom-property>)z-index: var(<custom-property>);

Basic example

Use the z- utilities like z-10 and z-50 to control the stack order (or three-dimensional positioning) of an element, regardless of the order it has been displayed:

<div class="z-40 ...">05</div>
<div class="z-30 ...">04</div>
<div class="z-20 ...">03</div>
<div class="z-10 ...">02</div>
<div class="z-0 ...">01</div>

Using negative values

To use a negative z-index value, prefix the class name with a dash to convert it to a negative value:

<div class="...">05</div>
<div class="...">04</div>
<div class="-z-10 ...">03</div>
<div class="...">02</div>
<div class="...">01</div>

Using a custom value

Use the z-[] syntax to set the stack order based on a completely custom value:

<div class="z-[calc(var(--index)+1)] ...">
  <!-- ... -->
</div>

Ref