ruby-position

The ruby-position CSS property defines the position of a ruby element relatives to its base element. It can be positioned over the element (over), under it (under), or between the characters on their right side (inter-character).

Syntax

/* Keyword values */
ruby-position: over;
ruby-position: under;
ruby-position: inter-character;
ruby-position: alternate;

/* Global values */
ruby-position: inherit;
ruby-position: initial;
ruby-position: revert;
ruby-position: unset;

Values

over: Is a keyword indicating that the ruby has to be placed over the main text for horizontal scripts and right to it for vertical scripts.
under: Is a keyword indicating that the ruby has to be placed under the main text for horizontal scripts and left to it for vertical scripts.
inter-character: Is a keyword indicating that the ruby has to be placed between the different characters.
alternate: Is a keyword indicating that the ruby alternates between over and under, when there are multiple levels of annotation.

Formal definition

Initial value	`alternate`
Applies to	ruby annotations containers
Inherited	yes
Computed value	as specified
Animation type	discrete

Formal syntax

[ alternate || [ over | under ] ] | inter-character

Examples

Ruby positioned over the text

HTML

<ruby>
  <rb>超電磁砲</rb>
  <rp>（</rp><rt>レールガン</rt><rp>）</rp>
</ruby>

CSS

ruby {
    ruby-position:over;
}

Result

Ruby positioned under the text

HTML

<ruby>
  <rb>超電磁砲</rb>
  <rp>（</rp><rt>レールガン</rt><rp>）</rp>
</ruby>

CSS

ruby {
    ruby-position:under;
}

Result

Ruby alternate

HTML

<ruby>
  <rb>A<rb>B<rb>C</rb>
  <rtc>Above</rtc>
  <rtc>Below</rtc>
</ruby>

CSS

ruby {
    ruby-position: alternate; /* this is also the initial value */
}

Result

Specifications

Specification
CSS Ruby Annotation Layout Module Level 1 # rubypos

Browser compatibility

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