CSS Paged Media

@page toc {
  size: a4 portrait;
  @top-center {
    content: "Table of contents";
  }
}

@page foreword {
  size: a4 portrait;
  @top-center {
    content: "Foreword";
  }
}

@page introduction {
  size: a4 portrait;
  @top-center {
    content: "Introduction";
  }
}

@page conclusion {
  size: a4 portrait;
  @top-center {
    content: "Conclusion";
  }
}

@page chapter {
  size: a4 landscape;
  @top-center {
    content: "Chapter";
  }
}

fieldset {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  gap: 1rem;
  width: fit-content;
}
body {
  font: 1.1em sans-serif;
}

@media print {
  fieldset {
    display: none;
  }
  section {
    font-size: 2rem;
    font-family: "Roboto", sans-serif;
  }
  .chapter {
    border: tomato 2px solid;
  }
  [data-print="grouped"] > #toc,
  [data-print="paged"] > #toc {
    page: toc;
    font-family: "Courier New";
  }
  [data-print="grouped"] > #foreword,
  [data-print="paged"] > #foreword {
    page: foreword;
    font-family: "Courier New";
  }
  [data-print="grouped"] > #introduction,
  [data-print="paged"] > #introduction {
    page: introduction;
    font-family: "Courier New";
  }
  [data-print="grouped"] > #conclusion,
  [data-print="paged"] > #conclusion {
    page: conclusion;
    font-family: "Courier New";
  }
  [data-print="grouped"] > .chapter,
  [data-print="paged"] > .chapter {
    page: chapter;
  }
  [data-print="paged"] > .chapter {
    border: none;
    break-after: page;
  }
  .chapter > ul {
    columns: 2;
  }
}

<!-- print options in a fieldset -->
<fieldset id="printStyle">
  <legend>How would you like to print</legend>
  <label for="single">
    <input type="radio" id="single" name="type" value="single" checked />
    No Pages
  </label>
  <label for="grouped">
    <input type="radio" id="grouped" name="type" value="grouped" />Pages with
    Grouped Chapters
  </label>
  <label for="paged">
    <input type="radio" id="paged" name="type" value="paged" />
    Chapters Paged
  </label>
  <button id="print">Print</button>
</fieldset>

<!-- Content to be printed -->
<article id="print-area" data-print="single">
  <section id="toc">
    <h2>Table of contents</h2>
    <ul>
      <li>Foreword</li>
      <li>Introduction</li>
      <li>Chapter One - named pages</li>
      <li>Chapter Two - page orientation</li>
      <li>Chapter Three - page margins</li>
      <li>Conclusion</li>
    </ul>
  </section>
  <section id="foreword">
    <h2>Foreword</h2>
    <p>
      This book is all about how the CSS <code>@page</code> at-rule can help
      with printing HTML books.
    </p>
  </section>
  <section id="introduction">
    <h2>Introduction</h2>
    <p>
      This book is a concept to show how an <em>HTML</em> document can easily be
      printed out in pages.
    </p>
  </section>
  <section id="chapter1" class="chapter">
    <h2>Named pages</h2>
    <p>Lorem ipsum</p>
  </section>
  <section id="chapter2" class="chapter">
    <h2>Page Orientation</h2>
    <p>Lorem ipsum</p>
  </section>
  <section id="chapter3" class="chapter">
    <h2>Page Margins</h2>
    <p>There are 16 page margins that can be set:</p>
    <ul>
      <li>@top-left-corner</li>
      <li>@top-left</li>
      <li>@top-center</li>
      <li>@top-right</li>
      <li>@top-right-corner</li>
      <li>@left-top</li>
      <li>@left-middle</li>
      <li>@left-bottom</li>
      <li>@right-top</li>
      <li>@right-middle</li>
      <li>@right-bottom</li>
      <li>@bottom-left-corner</li>
      <li>@bottom-left</li>
      <li>@bottom-center</li>
      <li>@bottom-right</li>
      <li>@bottom-right-corner</li>
    </ul>
    <p>They can be used to show what appears in these parts of the margin</p>
  </section>
  <section id="conclusion">
    <h2>Conclusion</h2>
    <p>Now go ahead and write books.</p>
  </section>
</article>

const printArea = document.querySelector("#print-area");
const printButton = document.querySelector("#print");
const printOption = document.querySelector("#printStyle");

printOption.addEventListener("change", (event) => {
  if (event.target.value === "single") {
    printArea.dataset.print = "single";
  } else if (event.target.value === "grouped") {
    printArea.dataset.print = "grouped";
  } else {
    printArea.dataset.print = "paged";
  }
});

printButton.addEventListener("click", () => {
  window.print();
});

@page {
  size: landscape;
  margin: 2cm;
}

section {
  page-break-after: always;
  break-after: page;
}

@media print {
  button {
    display: none;
  }
}

body {
  font-family: "Helvetica", sans-serif;
  background-color: silver;
}

article {
  width: 100%;
}

section {
  display: grid;
  background-color: white;
  border-radius: 0.6rem;
  justify-items: center;
  padding: 1rem;
  width: 50%;
  print-color-adjust: exact;
  -webkit-print-color-adjust: exact;
  margin: 0 auto;
  margin-block-end: 1rem;
  border: 1px dashed;
}

<button>Print page</button>
<article>
  <section>
    <h2>Header one</h2>
    <p>Paragraph one.</p>
  </section>
  <section>
    <h2>Header two</h2>
    <p>Paragraph two.</p>
  </section>
  <section>
    <h2>Header three</h2>
    <p>Paragraph three.</p>
  </section>
</article>

const button = document.querySelector("button");

button.addEventListener("click", () => {
  window.print();
});