轮廓宽度

示例

基本示例

使用 outline 或 outline-<number> 工具类，如 outline-2 和 outline-4 来设置元素的轮廓宽度：

<button class="outline outline-offset-2 ...">按钮 A</button>
<button class="outline-2 outline-offset-2 ...">按钮 B</button>
<button class="outline-4 outline-offset-2 ...">按钮 C</button>

聚焦时的应用

Prefix an outline-width utility with a variant like focus:* to only apply the utility in that state:

<button class="outline-offset-2 outline-sky-500 focus:outline-2 ...">保存更改</button>

Learn more about using variants in the variants documentation.

使用自定义值

Use the outline-[<value>] syntax to set the 轮廓宽度 based on a completely custom value:

<div class="outline-[2vw] ...">
  <!-- ... -->
</div>

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

<div class="outline-(length:--my-outline-width) ...">
  <!-- ... -->
</div>

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

响应式设计

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

<div class="outline md:outline-2 ...">
  <!-- ... -->
</div>

Learn more about using variants in the variants documentation.