css/css-text/text-spacing-trim/text-spacing-trim-001-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<script src="support/variant-class.js"></script>
<style>
@font-face {
  font-family: halt-font;
  src: url('/fonts/noto/cjk/NotoSansCJKjp-Regular-subset-halt.otf');
}
#container {
  font-family: halt-font;
  font-size: 20px;
  text-spacing-trim: space-all;
}
.vrl {
  writing-mode: vertical-rl;
}
halt {
  font-feature-settings: 'halt' 1, 'vhal' 1;
}
</style>
<div id="container">
  <!-- Open + Open/Close/Middle -->
  <div>国（<halt>（</halt>国</div>
  <div>国（<halt>（（</halt>国</div>
  <div>国（）国</div>
  <div>国（・国</div>
  <div>国（　国</div>
  <!-- Close + Open/Close/Middle -->
  <div>国）<halt>（</halt>国</div>
  <div>国<halt>）</halt>）国</div>
  <div>国<halt>））</halt>）国</div>
  <div>国<halt>）</halt>・国</div>
  <div>国<halt>）</halt>　国</div>
  <!-- Middle + Open/Middle/Close -->
  <div>国・<halt>（</halt>国</div>
  <div>国・・国</div>
  <div>国・）国</div>
  <div>国　<halt>（</halt>国</div>
  <div>国　　国</div>
  <div>国　）国</div>
</div>