CSS - tab-size

The tab-size CSS property is used to customize the width of a tab (U+0009) character.

Example

 

CSS
pre {
  tab-size: 4; /* Set tab size to 4 spaces */
}
CSS
pre {
  tab-size: 0; /* Remove indentation */
}
CSS
pre {
  tab-size: 99; /* Don't use tabs! */
}

Syntax  

CSS
/* <integer> values */
tab-size: 4;
tab-size: 0;

/* <length> values */
tab-size: 10px;
tab-size: 2em;

/* Global values */
tab-size: inherit;
tab-size: initial;
tab-size: unset;

Values

<integer>
The number of spaces in a tab. Must be nonnegative.
<length>
The width of a tab. Must be nonnegative.

Formal syntax

CSS
<a href="css/integer" title=""><integer></a> <a href="css/value_definition_syntax#single_bar" title="Single bar">|</a> <a href="css/length" title="Possible values: a number followed by'em', 'ex', 'ch', 'rem', 'px', 'cm', 'mm', 'in', 'vh', 'vw', 'vmin', 'vmax', 'pt', 'pc' or 'px', like 3px, 1.5cm, -0.5em or 0"><length></a>

Description  

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The tab-size CSS property is used to customize the width of a tab (U+0009) character.

Initial value8
Applies toblock containers
Inheritedyes
Mediavisual
Computed valuethe specified integer or an absolute length
Animatableno
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser Compatibility  

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 21 4.0 (2.0)-moz No support

10.60-o
15

 6.1
<length> 42 No support[1] No support No support No support
Feature Safari Mobile Opera Mini Opera Mobile Android
Basic support 7.1 5-o 11.5-o
24		 4.4

[1] Gecko doesn't implement this yet. See bug 943918.

See Also  

Specifications  

Specification Status Comment
CSS Text Level 3
The definition of 'tab-size' in that specification.		 Working Draft Initial definition

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/css/tab-size

CSS CSS Property Experimental Reference