column-rule - CSS: Cascading Style Sheets 编辑

The column-rule shorthand CSS property sets the width, style, and color of the line drawn between columns in a multi-column layout.

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It is a shorthand property that sets the individual column-rule-* properties in a single, convenient declaration: column-rule-width, column-rule-style, and column-rule-color.

Note: As with all shorthand properties, any individual value that is not specified is set to its corresponding initial value (possibly overriding values previously set using non-shorthand properties).

Syntax

column-rule: dotted;
column-rule: solid 8px;
column-rule: solid blue;
column-rule: thick inset blue;

/* Global values */
column-rule: inherit;
column-rule: initial;
column-rule: unset;

The column-rule property is specified as one, two, or three of the values listed below, in any order.

Values

<'column-rule-width'>

Is a <length> or one of the three keywords, thin, medium, or thick. See border-width for details.

<'column-rule-style'>

See border-style for possible values and details.

<'column-rule-color'>

Is a <color> value.

Formal definition

Formal syntax

<'column-rule-width'> || <'column-rule-style'> || <'column-rule-color'>

Examples

Example 1

/* Same as "medium dotted currentcolor" */
p.foo { column-rule: dotted; }

/* Same as "medium solid blue" */
p.bar { column-rule: solid blue; }

/* Same as "8px solid currentcolor" */
p.baz { column-rule: solid 8px; }

p.abc { column-rule: thick inset blue; }

Example 2

HTML

<p class="content-box">
  This is a bunch of text split into three columns.
  Take note of how the `column-rule` property is used
  to adjust the style, width, and color of the rule
  that appears between the columns.
</p>

CSS

.content-box {
  padding: 0.3em;
  background: #ff7;
  column-count: 3;
  column-rule: inset 2px #33f;
}

Result

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Multiple-column Layout
• column-rule-style
• column-rule-width
• column-rule-color