border-image-outset

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since February 2017.

概述

border-image-outset 属性定义边框图像可超出边框盒的大小。

初始值0
适用元素all elements, except internal table elements when border-collapse is collapse. It also applies to ::first-letter.
是否是继承属性否
计算值as specified, but with relative lengths converted into absolute lengths
Animation typeby computed value type

语法

Formal syntax: 
border-image-outset = 
  [ <length [0,∞]> | <number [0,∞]> ]{1,4}  



/* border-image-outset: sides */
border-image-outset: 30%;

/* border-image-outset:垂直 水平 */
border-image-outset: 10% 30%;

/* border-image-outset: 顶 水平 底 */
border-image-outset: 30px 30% 45px;

/* border-image-outset:顶 右 底 左  */
border-image-outset: 7px 12px 14px 5px;

border-image-repeat: inherit;

值

sides

边框图像在四个方向超出边框盒的<length>或<number>数量。

horizontal

边框图像在水平方向（左和右）超出边框盒的<length>或<number>数量。

vertical

边框图像在垂直方向（上和下）超出边框盒的<length>或<number>数量。

top

边框图像在上方超出边框盒的<length>或<number>数量。

bottom

边框图像在下方超出边框盒的<length>或<number>数量。

边框图像在右方超出边框盒的<length>或<number>数量。

left

边框图像在左方超出边框盒的<length>或<number>数量。

inherit

四个方向的值都继承于父元素的该属性计算后值。

规范

Specification
CSS Backgrounds and Borders Module Level 3
# the-border-image-outset

浏览器兼容性

BCD tables only load in the browser