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HTML 

              
                <head>
  <!-- head タグ内でスタイルの読み込み -->
  <link rel="stylesheet" type="text/css" href="https://unpkg.com/palt-typesetting@0.9.0/bundle/typesetter.min.css" />
</head>

<body>
  <p id="target">
    <span class="large en-section"
          >Typesetting Library for Proportional Spacing</span
      >

    <br /><br />──────<br /><br />

    <a
       href="https://github.com/yamatoiizuka/palt-typesetting"
       target="_balnk"
       >Palt Typesetting ↗︎</a
      >は、美しいテキスト表示を実現するためのJavaScriptライブラリです。和欧混植、およびツメ組み(font-feature-settings:
    'palt';)の版面設計において、最大限の力を発揮します。四分アキの自動挿入、カーニング<wbr />ルールの適用、英語のような単語区切りでの改行など、洗練された組版機能を提供します。

    <br /><br />──────<br /><br />

    <span class="en-section">
      <a
         href="https://github.com/yamatoiizuka/palt-typesetting"
         target="_balnk"
         >Palt Typesetting ↗︎</a
        >
      is a JavaScript library designed to achieve beautiful text rendering.
      It excels in mixed typesetting utilizing proportional spacing (enabled
      via font-feature-settings: 'palt';). This library offers sophisticated
      typesetting features, including automatic insertion of quarter em
      spaces, and application of kerning rules, and word-by-word line
      breaking similar to English text style.</span
      >

    <br /><br />─────<br /><br />

    Author: 飯塚大和（Yamato Iizuka）<br /><br />
    GitHub:
    <a href="https://github.com/yamatoiizuka" target="_balnk"
       >@yamatoiizuka</a
      ><br />
    Twitter: <a href="https://twitter.com/yamatoiizuka">@yamatoiizuka</a
    ><br />
    Website: <a href="https://yamatoiizuka.com" target="_blank">yamatoiizuka.com</a>

    <br /><br />

    <a href="https://palt.typesetting.jp" target="_balnk"
       >See an Interactive Demo ↗︎</a
      >
  </p>
  
  <!-- body 閉じタグの前でスクリプトの読み込み -->
  <script src="https://unpkg.com/palt-typesetting@0.9.0/bundle/typesetter.min.js"></script>
</body>
!

CSS 

              
                body {
  -webkit-font-smoothing: antialiased;
  margin: 5rem 3rem;
}

p {
  font-family: aktiv-grotesk, a-otf-gothic-bbb-pr6n, BlinkMacSystemFont, -system-ui, sans-serif;
  font-feature-settings: "palt";
  font-weight: 300;
  font-size: 1.4rem;
  line-height: 2;
  letter-spacing: 0.12em;
  color: rgb(9 9 11);
}

.large {
  font-size: 1.8rem;
}

/*
 * 共通のスタイリング
 */
.typesetting-wrapper {
  /*
   * Safari のフォントレンダリング対策。
   * 英数（.typesetting-latin）で -webkit-text-stroke を使う場合は必須。
   * text-stroke-weight > 0, text-stroke-color: transparent
   */
  -webkit-text-stroke: 0.01em transparent;
}

/*
 * 英数のみのスタイリング
 */
.typesetting-latin {
  /* フォントの拡大・縮小 */
  font-size: 104%;

  /* ベースラインの調整 */
  vertical-align: 0.02em;

  /*
   * 行間の調整。親要素 .typesetting-wrapper の行間と視覚的に合わせます。
   * [.typesetting-wrapper の line-height] ÷ [フォントの拡大率] - [ベースラインの調整値の絶対値] × 2 
   */
  line-height: calc(2 / 1.04 - 0.02 * 2);

  /* 文字間の調整 */
  letter-spacing: 0.05em;

  /* 文字の細らせ・太らせ */
  -webkit-text-stroke: 0.014em rgb(9 9 11);
}

/* 特例文字のスタイリング */
.typesetting-char-bracket {
  opacity: 0.4;
}

.en-section {
  line-height: 1.8;
}

.en-section .typesetting-latin {
  /*
   * 行間の調整。親要素 .typesetting-wrapper の行間と視覚的に合わせます。
   * [.typesetting-wrapper の line-height] ÷ [フォントの拡大率] - [ベースラインの調整値の絶対値] × 2 
   */
  line-height: calc(1.8 / 1.05 - 0.02 * 2);
}

a {
  color: rgb(9 9 11);
  text-decoration: underline;
  text-decoration-thickness: 0.04em;
  text-underline-offset: 0.25em;
}

a:hover {
  text-decoration: none;
}
!

JS 

              
                const options = {
  // 単語や助詞など、語単位での改行を行います。
  useWordBreak: true,

  // 英数を `.typesetting-latin` でラップします。
  wrapLatin: true,
  
    // 特例文字 `char` を `.typesetting-char-[label]` でラップします。
  wrapChars: [
    {
      char: '(',
      label: 'bracket',
    },
    {
      char: ')',
      label: 'bracket',
    },
  ],

  // 罫線などの分離禁則文字を `.typesetting-no-breaks` でラップし、文字間を 0 に設定します。
  noSpaceBetweenNoBreaks: true,

  // 四分アキスペースを自動で挿入します。
  insertThinSpaces: true,

  // 四分アキスペースの幅を設定します。
  thinSpaceWidth: "0.2em",

  // 特定の文字間のカーニングルールを設定します。
  kerningRules: [
    { between: ["美", "し"], value: 60 },
    { between: ["ス", "ト"], value: 120 },
    { between: ["イ", "ブ"], value: 20 },
    { between: ["ブ", "ラ"], value: -30 },
    { between: ["ラ", "リ"], value: 30 },
    { between: ["て", "、"], value: -60 },
    { between: ["す", "。"], value: -120 },
    { between: ["よ", "う"], value: 60 },
    { between: ["う", "な"], value: 40 },
    { between: ["さ", "れ"], value: 20 },
    { between: ["れ", "た"], value: -60 },
    { between: ["供", "し"], value: 40 },
    { between: ["し", "ま"], value: 70 },
  ],
};
const typesetter = new Typesetter(options);
typesetter.renderToSelector("#target");
!
999px

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