column-rule-width

The column-rule-width CSS property lets you set the width of the rule drawn between columns in multi-column layouts.

/* Keyword values */
column-rule-width: thin;
column-rule-width: medium;
column-rule-width: thick;
/* Length values */
column-rule-width: 1px;
column-rule-width: 2.5em;
/* Global values */
column-rule-width: inherit;
column-rule-width: initial;
column-rule-width: unset;

Initial value	`medium`
Applies to	multicol elements
Inherited	no
Media	visual
Computed value	the absolute length; `0` if the `column-rule-style` is `none` or `hidden`
Animation type	a length
Canonical order	the unique non-ambiguous order defined by the formal grammar

Syntax

A single <br-width> value.

Values

<br-width>: Is a <length> or one of the thin, medium or thick keyword describing the width of the rule separating two columns.

Formal syntax

<br-width>where 
<br-width> = <length> | thin | medium | thick

Example

#header {
  column-rule-width: thick;
}

Specifications

Specification	Status	Comment
CSS Multi-column Layout Module The definition of 'column-rule-width' in that specification.	Candidate Recommendation	Initial definition

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	(Yes)-webkit 50.0^[1]	(Yes)-webkit	3.5 (1.9.1)-moz 50.0 (50.0)^[2]	10	11.10	3.0 (522)-webkit

Feature	Android	Android Webview	Edge	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	?	? 50.0^[1]	(Yes)-webkit	(Yes) 50.0 (50.0)^[2]	?	?	?	? 50.0^[1]

[1] Unprefixed as of Chrome 50.

[2] Unprefixed as of Gecko 52, with prefixed aliases still available.