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<title>Dynamic break point change in ruby</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
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<link rel="help" href="https://drafts.csswg.org/css-ruby-1/#break-between">
<link rel="match" href="ruby-line-breaking-003-ref.html">
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#test {
border: 1px solid;
text-align: center;
}
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<div id="test">
<p><ruby><rb>一<rb>二<rb>三<rb>四<rb>五<rb>六<rb>七<rb>八</ruby></p>
<p><ruby><rbc>一</rbc><rbc>二</rbc><rbc>三</rbc><rbc>四</rbc><rbc>五</rbc><rbc>六</rbc><rbc>七</rbc><rbc>八</rbc></ruby></p>
</div>
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let div = document.getElementById("test");
document.body.offsetHeight;
test.style.width = "2.5em";
document.body.offsetHeight;
test.style.width = "4.5em";
document.body.offsetHeight;
test.style.width = "2.5em";
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