border-block-width
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2021年4月.
CSS 属性 border-block-width 定义了元素的逻辑块向的边框宽度，并根据元素的书写模式、行内方向和文本朝向对应至实体边框宽度。根据 writing-mode、direction 和 text-orientation 所定义的值，此属性对应于 border-top-width 和 border-bottom-width，或者 border-left-width 和 border-right-width 属性。
尝试一下
border-block-width: thick; writing-mode: horizontal-tb; border-block-width: thick; writing-mode: vertical-rl; border-block-width: 4px; writing-mode: horizontal-tb; direction: rtl; <section class="default-example" id="default-example"> <div class="transition-all" id="example-element"> This is a box with a border around it. </div> </section> #example-element { background-color: palegreen; color: #000; border: 0 solid crimson; padding: 0.75em; width: 80%; height: 100px; unicode-bidi: bidi-override; } 另一方向的边框宽度可用 border-inline-width 设置，此属性会设置 border-inline-start-width 和 border-inline-end-width。
语法
css
/* 边框宽度值 */ border-block-width: 5px; border-block-width: thick; /* 全局值 */ border-block-width: inherit; border-block-width: initial; border-block-width: revert; border-block-width: revert-layer; border-block-width: unset; 取值
<'border-width'>-
边框宽度。见
border-width。
形式定义
形式语法
border-block-width =
<'border-top-width'>{1,2}
<border-top-width> =
<line-width>
<line-width> =
<length [0,∞]> |
thin |
medium |
thick
示例
竖排文本的边框宽度
HTML
html
<div> <p class="exampleText">示例文本</p> </div> CSS
css
div { background-color: yellow; width: 120px; height: 120px; } .exampleText { writing-mode: vertical-lr; border: 1px solid blue; border-block-width: 5px; } 结果
规范
| Specification |
|---|
| CSS Logical Properties and Values Level 1 # propdef-border-block-width |