ruby-align

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.

Summary

The ruby-align CSS property defines the distribution of the different ruby elements over the base.

Initial valuespace-around
Applies toruby bases, ruby annotations, ruby base containers, ruby annotation containers
Inheritedyes
Mediavisual
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

/* Keyword values */
ruby-align: start;
ruby-align: center;
ruby-align: space-between;
ruby-align: space-around;

/* Global values */
ruby-align: inherit;
ruby-align: initial;
ruby-align: unset;

Values

start
Is a keyword indicating that the ruby will be aligned with the start of the base text.
center
Is a keyword indicating that the ruby will be aligned at the middle of the base text
space-between
Is a keyword indicating that the extra space will be distributed between the elements of the ruby.
space-around
Is a keyword indicating that the extra space will be distributed between the elements of the ruby, and around it.

Formal syntax

start | center | space-between | space-around

Examples

This HTML will render differently with each value of ruby-align:

<ruby>
  <rb>This is a long text to check</rb>
  <rp>(</rp><rt>short ruby</rt><rp>)</rp>
</ruby>

Ruby aligned at the start of the base text

ruby {
  ruby-align:start;
}

This gives the following result:

Ruby aligned at the center of the base text

ruby {
  ruby-align:center;
}

This gives the following result:

Extra space distributed between ruby elements

ruby {
  ruby-align:space-between;
}

This gives the following result:

Extra space distributed between and around ruby elements

ruby {
  ruby-align:space-around;
}

This gives the following result:

Specifications

Specification Status Comment
CSS Ruby Layout Module Level 1
The definition of 'ruby-align' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support No support 38 (38) No support[1] No support No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support No support 38.0 (38) No support[1] No support No support

[1] Since version 9 Internet Explorer implements an early draft of CSS Ruby where ruby-align had the following values: auto, left, center, right, distribute-letter, distribute-space, and line-edge. Here is a rough conversion table:

IE syntax Standard syntax
auto Don't use ruby-align
left Use start (in ltr scripts)
center center
right Use start (in rtl scripts)
distribute-letter No direct equivalent, use space-between or space-around
distribute-space space-around
line-edge No direct equivalent.

See also

Document Tags and Contributors

 Contributors to this page: Sebastianz, sequen7e, fscholz, teoli
 Last updated by: Sebastianz,