<!DOCTYPE html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
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<html lang="ja">
<meta charset="utf-8">
<title>Reference: DIV append in 'display:ruby/block ruby'.</title>
<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
<style>
html,body {
  color:black; background-color:white; font:10px/1 monospace; padding:0; margin:0;
}

rbb, ruby { background:lightblue; text-overflow:ellipses; }
ruby { display: ruby; }
rbb { display: block ruby; }
grid { display: grid; }
.mbp {
  margin: 1px 3px 5px 7px;
  padding: 3px 5px 7px 1px;
  border-width: 3px 1px 7px 5px;
  border-style: solid;
}
rbc {
  display: ruby-base-container;
  unicode-bidi: isolate;
  font-size: 200%;
}
rtc {
  display: ruby-text-container;
  unicode-bidi: isolate;
  ruby-position: under;
}
x { display:block; width:3em; overflow:hidden; background:lightblue; }
</style>

<div>zzzzzzzzzzzz</div>
<ruby class=mbp>X<div>zzzzzzzzzzzz</div></ruby>
<grid>A<x class=mbp><rbb><div>zzzzzzzzzzzz</div></rbb></x>B</grid>
<grid>A<x class=mbp><rbb>X<div>zzzzzzzzzzzz</div></rbb></x>B</grid>
<grid>A<x><rbb>X<div>zzzzzzzzzzzz</div></rbb></x><x><rbb><rbc></rbc><div>zzzzzzzzzzzz</div></rbb></x>B</grid>
<grid>A<x><rbb><div>zzzzzzzzzzzz</div></rbb></x><x><rbb><rbc>X</rbc><div>zzzzzzzzzzzz</div></rbb></x>B</grid>
<ruby><rt><ruby>X<div>zzzzzzzzzzzz</div></ruby></rt><div>zzzzzzzzzzzz</div></ruby>
<ruby><rbc><ruby>X<div>zzzzzzzzzzzz</div></ruby></rbc><div>zzzzzzzzzzzz</div></ruby>
<ruby><rtc><ruby>X<div>zzzzzzzzzzzz</div></ruby></rtc><div>zzzzzzzzzzzz</div></ruby>
<x class=mbp><rbb><div>zzzzzzzzzzzz</div></rbb></x>
<x class=mbp><rbb>X<div>zzzzzzzzzzzz</div></rbb></x>
<x class=mbp><rbb><rt>X</rt><div>zzzzzzzzzzzz</div></rbb></x>
<x class=mbp><rbb><rb>X</rb><div>zzzzzzzzzzzz</div></rbb></x>

</html>