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• 句法
• 形式定义
• 形式句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

border-image-width CSS property sets the width of an element's border image .

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

If this property's value is greater than the element's border-width , the border image will extend beyond the padding (and/or content) edge.

句法

/* Keyword value */
border-image-width: auto;
/* <length> value */
border-image-width: 1rem;
/* <percentage> value */
border-image-width: 25%;
/* <number> value */
border-image-width: 3;
/* vertical | horizontal */
border-image-width: 2em 3em;
/* top | horizontal | bottom */
border-image-width: 5% 15% 10%;
/* top | right | bottom | left */
border-image-width: 5% 2em 10% auto;
/* Global values */
border-image-width: inherit;
border-image-width: initial;
border-image-width: unset;
					

border-image-width property may be specified using one, two, three, or four values chosen from the list of values below.

• When one value is specified, it applies the same width to all four sides .
• When two values are specified, the first width applies to the top and bottom , the second to the left and right .
• When three values are specified, the first width applies to the top , the second to the left and right , the third to the bottom .
• When four values are specified, the widths apply to the top , right , bottom ，和 left in that order (clockwise).

值

<length-percentage>

The width of the border, specified as a <length> 或 <percentage> . Percentages are relative to the width of the border image area for horizontal offsets and the height of the border image area for vertical offsets. Must not be negative.

<number>

The width of the border, specified as a multiple of the corresponding border-width . Must not be negative.

auto

The width of the border is made equal to the intrinsic width or height (whichever is applicable) of the corresponding border-image-slice . If the image does not have the required intrinsic dimension, the corresponding border-width is used instead.

形式定义

初始值	1
适用于	all elements, except internal table elements when border-collapse is collapse . It also applies to ::first-letter .
继承	no
百分比	refer to the width or height of the border image area
计算值	as specified, but with relative lengths converted into absolute lengths
动画类型	by computed value type

形式句法

[ <length-percentage> | <number> | auto ]{1,4}
where 
<length-percentage> = <length> | <percentage>
					

范例

Tiling a border image

This example creates a border image using the following ".png" file, which is 90 by 90 pixels:

Thus, each circle in the source image is 30 by 30 pixels.

HTML

<p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy
   eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.
   At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren,
   no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
					

CSS

p {
  border: 20px solid;
  border-image: url("https://mdn.mozillademos.org/files/10470/border.png") 30 round;
  border-image-width: 16px;
  padding: 40px;
}
					

结果

规范

规范	状态	注释
CSS Backgrounds and Borders Module Level 3 The definition of 'border-image-width' in that specification.	候选推荐	初始定义

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
border-image-width	Chrome 完整支持 15	Edge 完整支持 12	Firefox 完整支持 13	IE 完整支持 11	Opera 完整支持 15	Safari 完整支持 6	WebView Android 完整支持 ≤37	Chrome Android 完整支持 18	Firefox Android 完整支持 14	Opera Android 完整支持 14	Safari iOS 完整支持 6	Samsung Internet Android 完整支持 1.0

图例

完整支持

完整支持

元数据

• 最后修改： Jul 24, 2020

相关话题

1. CSS
2. CSS 参考
3. CSS Backgrounds and Borders
4. 指南

   1. Resizing background images with background-size
   2. Using multiple backgrounds
5. 特性

   1. background
   2. background-attachment
   3. background-clip
   4. background-color
   5. background-image
   6. background-origin
   7. background-position
   8. background-position-x
   9. background-position-y
   10. background-repeat
   11. background-size
   12. border
   13. border-bottom
   14. border-bottom-color
   15. border-bottom-left-radius
   16. border-bottom-right-radius
   17. border-bottom-style
   18. border-bottom-width
   19. border-color
   20. border-image
   21. border-image-outset
   22. border-image-repeat
   23. border-image-slice
   24. border-image-source
   25. border-image-width
   26. border-left
   27. border-left-color
   28. border-left-style
   29. border-left-width
   30. border-radius
   31. border-right
   32. border-right-color
   33. border-right-style
   34. border-right-width
   35. border-style
   36. border-top
   37. border-top-color
   38. border-top-left-radius
   39. border-top-right-radius
   40. border-top-style
   41. border-top-width
   42. border-width
   43. box-shadow