The <rp> HTML element is used to provide fall-back parentheses for browsers that do not support display of ruby annotations using the <ruby> element. One <rp> element should enclose each of the opening and closing parentheses that wrap the <rt> element that contains the annotation's text.
On this page
<rp>: The Ruby Fallback Parenthesis element
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Attributes
This element only includes the global attributes.
Usage notes
- Ruby annotations are for showing pronunciation of East Asian characters, like using Japanese furigana or Taiwanese bopomofo characters. The 
<rp>element is used in the case of lack of<ruby>element support; the<rp>content provides what should be displayed in order to indicate the presence of a ruby annotation, usually parentheses. 
Examples
Using ruby annotations
This example uses ruby annotations to display the Romaji equivalents for each character.
html
<ruby>
  漢 <rp>(</rp><rt>Kan</rt><rp>)</rp> 字 <rp>(</rp><rt>ji</rt><rp>)</rp>
</ruby>
   Result
See the article about the <ruby> element for further examples.
Without ruby support
If your browser does not support ruby annotations, the result looks like this instead:
Technical summary
| Content categories | None. | 
|---|---|
| Permitted content | Text | 
| Tag omission | The end tag can be omitted if the element is immediately followed by an <rt> or another <rp> element, or if there is no more content in the parent element. | 
        
| Permitted parents | A <ruby> element. <rp> must be positioned immediately before or after an <rt> element. | 
        
| Implicit ARIA role | No corresponding role | 
| Permitted ARIA roles | Any | 
| DOM interface | HTMLElement | 
        
Specifications
| Specification | 
|---|
| HTML Standard  # the-rp-element  | 
      
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
rp | 
       5 | 79 | 38 | 5 | 15 | 5 | 4.4 | 18 | 38 | 14 | 4.2 | 1.0 | 
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
 https://developer.mozilla.org/en-US/docs/Web/HTML/Element/rp