z-index

Utilities for controlling the stack order of an element.

Quick reference

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

Source: https://tailwindcss.com/guide/z-index

Examples

Basic example

Use the z-<number> 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:

<!-- [!code classes:z-40,z-30,z-20,z-10,z-0] -->
<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:

<!-- [!code classes:-z-10] -->
<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-[<value>] syntax to set the z-index based on a completely custom value:

<div class="z-[999] ...">Lorem ipsum dolor sit amet...</div>
<div class="z-[calc(var(--index)+1)] ...">Lorem ipsum dolor sit amet...</div>

For CSS variables, you can also use the z-(<custom-property>) syntax:

<div class="z-(--my-z-index) ...">Lorem ipsum dolor sit amet...</div>

This is just a shorthand for z-[var(<custom-property>)] that adds the var() function for you automatically.

Responsive design

Prefix a z-index utility with a breakpoint variant like md: to only apply the utility at medium screen sizes and above:

<div class="z-0 md:z-50 ...">Lorem ipsum dolor sit amet...</div>

Learn more about using variants in the variants documentation.