-webkit-border-before

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

The -webkit-border-before CSS property is a shorthand property for setting the individual logical block start border property values in a single place in the style sheet.

Constituent properties

This property is a shorthand for the following CSS properties:

Syntax

css
/* Border values */
-webkit-border-before: 1px;
-webkit-border-before: 2px dotted;
-webkit-border-before: medium dashed blue;

/* Global values */
-webkit-border-before: inherit;
-webkit-border-before: initial;
-webkit-border-before: revert;
-webkit-border-before: revert-layer;
-webkit-border-before: unset;

Values

One or more of the following, in any order:

<'border-width'>

See border-width

<'border-style'>

See border-style

<'color'>

See color

Description

The -webkit-border-before property maps to a physical border depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top, border-right, border-bottom, or border-left property depending on the values defined for writing-mode, direction, and text-orientation.

It relates to -webkit-border-after, -webkit-border-start, and -webkit-border-end, which define the other borders of the element.

The standard-track equivalent of this property is border-block-start.

Formal definition

Initial valueas each of the properties of the shorthand:
Applies toall elements
Inheritedyes
Percentagesas each of the properties of the shorthand:
Computed valueas each of the properties of the shorthand:
Animation typediscrete

Formal syntax

-webkit-border-before = 
  <'border-width'>  ||
  <'border-style'>  ||
  <color>           

<border-width> = 
  <line-width>{1,4}  

<border-style> = 
  <line-style>{1,4}  

<line-width> = 
  <length [0,∞]>  |
  thin            |
  medium          |
  thick           

<line-style> = 
  none    |
  hidden  |
  dotted  |
  dashed  |
  solid   |
  double  |
  groove  |
  ridge   |
  inset   |
  outset

Examples

Applying a border with vertical text

HTML

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

CSS

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

.exampleText {
  writing-mode: vertical-rl;
  -webkit-border-before: 5px dashed blue;
}

Result

Specifications

Not part of any standard, but it relates to the standards-track border-block-start property.

Browser compatibility

See also