边界块初始颜色 | border-block-start-color

边框块-开始颜色

这是一种实验技术

由于该技术的规格不稳定，请查看各种浏览器的兼容性表格以供使用。还要注意，随着规范的变化，实验技术的语法和行为在未来版本的浏览器中可能会发生变化。

border-block-start-color 映射到依赖于要素的写作模式，方向性和文本方向的物理边框颜色的逻辑块开始边框的颜色。它对应于border-top-color，border-right-color，border-bottom-color，或border-left-color属性根据为定义的值writing-mode，direction和text-orientation。

border-block-start-color: blue;
border-block-start-color: #4c5d21;

相关属性是border-block-end-color，border-inline-start-color，和border-inline-end-color定义元素的其他边框颜色。

初始值	currentcolor
应用于	all elements
是否继承	no
适用媒体	visual
计算值	computed color
Animation type	discrete
规范顺序	the unique non-ambiguous order defined by the formal grammar

句法

价值

<'color'>参见 border-color

形式语法

<'color'>where 
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
where 
<rgb()> = rgb( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<rgba()> = rgba( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<hsl()> = hsl( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<hsla()> = hsla( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
where 
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>

例

HTML内容

<div>
  <p class="exampleText">Example text</p>
</div>

CSS内容

div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-lr;
  border: 10px solid blue;
  border-block-start-color: red;
}

规格

Specification	Status	Comment
CSS Logical Properties Level 1The definition of 'border-block-start-color' in that specification.	Editor's Draft	Initial definition

浏览器兼容性

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	No support	41.0 (41.0)1	No support	No support	No support

Feature	Android	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	No support	41.0 (41.0)1	No support	No support	No support