Borders
边框宽度
用于控制元素边框宽度的功能类。
| Class | Styles |
|---|---|
border | border-width: 1px; |
border-<number> | border-width: <number>px; |
border-(length:<custom-property>) | border-width: var(<custom-property>); |
border-[<value>] | border-width: <value>; |
border-x | border-inline-width: 1px; |
border-x-<number> | border-inline-width: <number>px; |
border-x-(length:<custom-property>) | border-inline-width: var(<custom-property>); |
border-x-[<value>] | border-inline-width: <value>; |
border-y | border-block-width: 1px; |
border-y-<number> | border-block-width: <number>px; |
border-y-(length:<custom-property>) | border-block-width: var(<custom-property>); |
border-y-[<value>] | border-block-width: <value>; |
border-s | border-inline-start-width: 1px; |
border-s-<number> | border-inline-start-width: <number>px; |
border-s-(length:<custom-property>) | border-inline-start-width: var(<custom-property>); |
border-s-[<value>] | border-inline-start-width: <value>; |
border-e | border-inline-end-width: 1px; |
border-e-<number> | border-inline-end-width: <number>px; |
border-e-(length:<custom-property>) | border-inline-end-width: var(<custom-property>); |
border-e-[<value>] | border-inline-end-width: <value>; |
border-t | border-top-width: 1px; |
border-t-<number> | border-top-width: <number>px; |
border-t-(length:<custom-property>) | border-top-width: var(<custom-property>); |
border-t-[<value>] | border-top-width: <value>; |
border-r | border-right-width: 1px; |
border-r-<number> | border-right-width: <number>px; |
border-r-(length:<custom-property>) | border-right-width: var(<custom-property>); |
border-r-[<value>] | border-right-width: <value>; |
border-b | border-bottom-width: 1px; |
border-b-<number> | border-bottom-width: <number>px; |
border-b-(length:<custom-property>) | border-bottom-width: var(<custom-property>); |
border-b-[<value>] | border-bottom-width: <value>; |
border-l | border-left-width: 1px; |
border-l-<number> | border-left-width: <number>px; |
border-l-(length:<custom-property>) | border-left-width: var(<custom-property>); |
border-l-[<value>] | border-left-width: <value>; |
divide-x | & > :not(:last-child) {
border-inline-start-width: 0px;
border-inline-end-width: 1px;
} |
divide-x-<number> | & > :not(:last-child) {
border-inline-start-width: 0px;
border-inline-end-width: <number>px;
} |
divide-x-(length:<custom-property>) | & > :not(:last-child) {
border-inline-start-width: 0px;
border-inline-end-width: var(<custom-property>);
} |
divide-x-[<value>] | & > :not(:last-child) {
border-inline-start-width: 0px;
border-inline-end-width: <value>;
} |
divide-y | & > :not(:last-child) {
border-top-width: 0px;
border-bottom-width: 1px;
} |
divide-y-<number> | & > :not(:last-child) {
border-top-width: 0px;
border-bottom-width: <number>px;
} |
divide-y-(length:<custom-property>) | & > :not(:last-child) {
border-top-width: 0px;
border-bottom-width: var(<custom-property>);
} |
divide-y-[<value>] | & > :not(:last-child) {
border-top-width: 0px;
border-bottom-width: <value>;
} |
divide-x-reverse | --tw-divide-x-reverse: 1; |
divide-y-reverse | --tw-divide-y-reverse: 1; |
示例
设置边框宽度
使用 border-{width} 功能类来设置元素所有边的边框宽度：
border
border-2
border-4
border-8
<div class="border border-indigo-600 ..."></div><div class="border-2 border-indigo-600 ..."></div><div class="border-4 border-indigo-600 ..."></div><div class="border-8 border-indigo-600 ..."></div>设置单边边框
使用 border-{t|r|b|l}-{width} 功能类来设置元素某一边的边框宽度：
border-t-4
border-r-4
border-b-4
border-l-4
<div class="border-t-4 border-indigo-500 ..."></div><div class="border-r-4 border-indigo-500 ..."></div><div class="border-b-4 border-indigo-500 ..."></div><div class="border-l-4 border-indigo-500 ..."></div>使用水平和垂直边框
使用 border-{x|y}-{width} 功能类来同时设置元素水平或垂直方向边的边框宽度：
border-x-4
border-y-4
<div class="border-x-4 border-indigo-500 ..."></div><div class="border-y-4 border-indigo-500 ..."></div>使用逻辑属性
使用 border-{s|e}-{width} 功能类来根据当前书写方向设置元素边框的宽度：
Left-to-right
Right-to-left
<div dir="ltr"> <div class="border-s-4 ..."></div></div><div dir="rtl"> <div class="border-s-4 ..."></div></div>边框分隔线
使用 divide-{x/y}-{width} 功能类来在一组元素之间添加分隔线：
01
02
03
<div class="grid grid-cols-3 divide-x-4"> <div>01</div> <div>02</div> <div>03</div></div>反转子元素顺序
如果你的元素是反向排序的（例如使用 flex-row-reverse 或 flex-col-reverse），请使用 divide-x-reverse 或 divide-y-reverse 功能类来确保边框添加到每个元素的正确侧：
01
02
03
<div class="flex flex-col-reverse divide-y-4 divide-y-reverse divide-gray-200"> <div>01</div> <div>02</div> <div>03</div></div>使用自定义值
Use the border-[<value>] syntax to set the border width based on a completely custom value:
<div class="border-[2vw] ..."> <!-- ... --></div>For CSS variables, you can also use the border-(length:<custom-property>) syntax:
<div class="border-(length:--my-border-width) ..."> <!-- ... --></div>This is just a shorthand for border-[length:var(<custom-property>)] that adds the var() function for you automatically.
响应式设计
Prefix a border-width utility with a breakpoint variant like md: to only apply the utility at medium screen sizes and above:
<div class="border-2 md:border-t-4 ..."> <!-- ... --></div>Learn more about using variants in the variants documentation.
