<ruby>The <ruby> element produces small annotations that are rendered with its base text.htmlHTMLwidely2015-07-292018-01-29https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-rp-elementhttps://html.spec.whatwg.org/multipage/text-level-semantics.html#the-rt-elementhttps://html.spec.whatwg.org/multipage/text-level-semantics.html#the-ruby-elementrubyhttps://developer.mozilla.org/docs/Web/HTML/Reference/Elements/rphtml.elements.rphtml.elements.rthtml.elements.rubyhttps://nowyoucanuse.com/features--ruby.html