background-size

background-size

用于控制元素背景图像背景大小的工具类。

Class Styles

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

bg-auto

background-size: auto;

bg-cover

background-size: cover;

bg-contain

background-size: contain;

bg-(length:<custom-property>)

background-size: var(<custom-property>);

bg-[<value>]

background-size: <value>;

示例

使用 bg-cover 工具类缩放背景图像，使其填满背景层，必要时裁剪图像：

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

使用 bg-contain 工具类将背景图像缩放至外边缘，而不裁剪或拉伸：

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

使用 bg-auto 工具类以默认大小显示背景图像：

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

Use the bg-[<value>] syntax to set the 背景图像大小 based on a completely custom value:

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

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

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

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

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.