word-break-auto-phrase-overflow-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<link rel="help" href="https://drafts.csswg.org/css-text-4/#word-break-property">
<link rel="match" href="reference/word-break-auto-phrase-overflow-001-ref.html">
<!--
  This test assumes that all engines segment a Japanese text:
    楽しいドライブ
  to the following phrases:
    楽しい / ドライブ

  While assuming all engines segment this way looks fairly reasonable,
  segmenting differently doesn't necessarily mean a failure because the
  algorithm is UA dependent. Please add references if different.
-->
<style>
@font-face {
  font-family: mplus;
  src: url(/fonts/mplus-1p-regular.woff);
}
.container > div {
  font-family: mplus;
  word-break: auto-phrase;
  font-size: 10px;
  border: 1px solid;
}
</style>
<div class="container" lang="ja">
  <!-- Both phrases can fit to 7em, but the whole sentence doesn't. -->
  <div style="width: 7em">
    楽しいドライブ。</div>
  <!-- The 2nd phrase doesn't fit to `4em`, hence fallback to normal. -->
  <div style="width: 4em">
    楽しいドライブ。</div>
  <!-- Only one character can fit to `1em`, but no break before the period. -->
  <div style="width: 1em">
    楽しいドライブ。</div>
  <!-- Breaks even before the period if `overflow-wrap`. -->
  <div style="width: 1em; overflow-wrap: anywhere">
    楽しいドライブ。</div>
</div>

chromium/third_party/blink/web_tests/external/wpt/css/css-text/word-break/auto-phrase/word-break-auto-phrase-overflow-001.html