column-gap

Summary

The column-gap CSS property sets the size of the gap between columns for elements which are specified to be displayed as multi-column elements.

Initial value	`normal`
Applies to	multicol elements
Inherited	no
Media	visual
Computed value	the absolute length or the keyword `normal`
Animatable	yes, as a length
Canonical order	the unique non-ambiguous order defined by the formal grammar

Syntax

/* Keyword value */
column-gap: normal; 

/* <length> values */
column-gap: 3px;
column-gap: 2.5em;

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

Values

normal: Is a keyword indicating to use the browser-defined default spacing between columns. The specification, which most modern browsers follow, recommends that this be equal to a length of 1em.
<length>: Is a <length> value defining the size of the gap between columns. It must not be negative, but may be equal to 0.

Formal syntax

<length> | normal

Examples

.content-box {
  border: 10px solid #000000;
  column-count: 3;
  column-gap: 20px;
}

Specifications

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

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	(Yes)-webkit	1.5 (1.8)-moz^[1]	10	11.10	3.0 (522)-webkit
Unprefixed	50.0

Feature	Android	Android Webview	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	?	?	(Yes)	?	?	?	?
Unprefixed	No support	50.0					50.0

[1] Before Firefox 3 (Gecko 1.9), the default value associated to the normal keyword was 0 and not 1em.