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/CSS

tab-size

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

/* <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;
Initial value 8
Applies to block containers
Inherited yes
Media visual
Computed value the specified integer or an absolute length
Animation type a length
Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

Values

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

Formal syntax

<integer> | <length>

Examples

pre {
  tab-size: 4; /* Set tab size to 4 spaces */
}
pre {
  tab-size: 0; /* Remove indentation */
}
pre {
  tab-size: 2; /* Set tab size to 2 spaces */
}

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 21
21
This property is not yet animatable.
No 4
Prefixed
4
Prefixed
Prefixed Requires the vendor prefix: -moz-
See bug 737785 for the status of unprefixing this property.
Before Firefox 53, this property was not animatable.
No 15
15
10.5
Prefixed
Prefixed Requires the vendor prefix: -o-
6.1
<length> 42 No 53 No 29 No
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 4.4 ? ? 4
Prefixed
4
Prefixed
Prefixed Requires the vendor prefix: -moz-
See bug 737785 for the status of unprefixing this property.
Before Firefox 53, this property was not animatable.
24
24
11.5
Prefixed
Prefixed Requires the vendor prefix: -o-
7.1 ?
<length> 56 ? ? 53 37 No ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/tab-size