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 annotaion.

Formal definition

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

Browser compatibility

See also

• HTML Ruby elements: <ruby>, <rt>, <rp>, and <rtc>.
• CSS Ruby properties: ruby-align, ruby-merge.