background-size

Utilities for controlling the background size of an element's background image.

Quick reference

Class	Styles
bg-auto	background-size: auto;
bg-cover	background-size: cover;
bg-contain	background-size: contain;
bg-size-(<custom-property>)	background-size: var(<custom-property>);
bg-size-[<value>]	background-size: <value>;

Source: https://tailwindcss.com/guide/background-size

Examples

Filling the container

Use the bg-cover utility to scale the background image until it fills the background layer, cropping the image if needed:

<!-- [!code classes:bg-cover] -->
<div class="bg-[url(/img/mountains.jpg)] bg-cover bg-center"></div>

Filling without cropping

Use the bg-contain utility to scale the background image to the outer edges without cropping or stretching:

<!-- [!code classes:bg-contain] -->
<div class="bg-[url(/img/mountains.jpg)] bg-contain bg-center"></div>

Using the default size

Use the bg-auto utility to display the background image at its default size:

<!-- [!code classes:bg-auto] -->
<div class="bg-[url(/img/mountains.jpg)] bg-auto bg-center bg-no-repeat"></div>

Using a custom value

Use the bg-size-[<value>] syntax to set the background size based on a completely custom value:

<div class="bg-size-[auto_100px] ...">
  <!-- ... -->
</div>

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

<div class="bg-size-(--my-size) ...">
  <!-- ... -->
</div>

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

Responsive design

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

<div class="bg-auto md:bg-contain ...">
  <!-- ... -->
</div>

Learn more about using variants in the variants documentation.