This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The <rt> HTML element specifies the ruby text component of a ruby annotation, which is used to provide pronunciation, translation, or transliteration information for East Asian typography. The <rt> element must always be contained within a <ruby> element.
<ruby> 漢 <rp>(</rp><rt>kan</rt><rp>)</rp> 字 <rp>(</rp><rt>ji</rt><rp>)</rp> </ruby>
ruby {
font-size: 2em;
}
See the article about the <ruby> element for more examples.
This element only includes the global attributes.
This example provides Romaji transliteration for the kanji characters within the <ruby> element:
<ruby> 漢 <rt>Kan</rt> 字 <rt>ji</rt> </ruby>
| Content categories | None. |
|---|---|
| Permitted content | Phrasing content. |
| Tag omission | The end tag may be omitted if the <rt> element is immediately followed by an <rt> or <rp> element, or if there is no more content in the parent element |
| Permitted parents | A <ruby> element. |
| Implicit ARIA role | No corresponding role |
| Permitted ARIA roles | Any |
| DOM interface | HTMLElement |
| Specification |
|---|
| HTML> # the-rt-element> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
rt |
5 | 12 | 38 | 15 | 5 | 18 | 38 | 14 | 4.2 | 1.0 | 4.4 | 4.2 |
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https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/rt